TY - PAT A1 - Riebel, Ulrich T1 - Vorrichtung und Verfahren zur Aerosolauf- oder Aerosolumladung in einen definierten Ladungszustand einer bipolaren Diffusionsaufladung mit Hilfe einer elektrischen Entladung im Aerosolraum N2 - Deutsche Patentanmeldung DBPA 103 48 217.1-54, vom 16.10.03 KW - Aerosole KW - elektrische Ladung KW - Neutralisation Y1 - 2003 ER - TY - JOUR A1 - Shen, Jianqi A1 - Riebel, Ulrich A1 - Breitenstein, Marcus T1 - Fundamentals of Transmission Fluctuation Spectrometry with Variable Spatial Averaging KW - Partikelmesstechnik Y1 - 2003 ER - TY - JOUR A1 - Stommel, Yves-Gorat A1 - Riebel, Ulrich T1 - Neutrale Aerosole ohne Radioaktivität KW - Aerosole Y1 - 2004 ER - TY - CHAP A1 - Leubner, Holger A1 - Mnich, Robert A1 - Riebel, Ulrich T1 - Entfernung von sauren Gasen durch Chemisorption in einer Precoatschicht N2 - Vortrag auf GVC-Fachausschusssitzung "Gasreinigung", Karlsruhe, 16.-17. Februar 2004 KW - Filtration KW - Precoat Y1 - 2004 ER - TY - CHAP A1 - Mnich, Robert A1 - Pertik, Tim A1 - Riebel, Ulrich T1 - Biologisch-Elektrische Gasreinigung (BEGA)t KW - Geruchsabscheidung KW - Gasreinigung Y1 - 2004 ER - TY - CHAP A1 - Mnich, Robert A1 - Leubner, Holger A1 - Riebel, Ulrich T1 - Gleichzeitige Abscheidung von Stäuben und sauren Gasen (HCl, SO2) an Alpha-FilterkerzenGleichzeitige Abscheidung von Stäuben und sauren Gasen (HCl, SO2) an Alpha-Filterkerzen KW - Gasreinigung KW - Sorption Y1 - 2004 ER - TY - CHAP A1 - Shen, Jianqi A1 - Riebel, Ulrich A1 - Guo, Xiaoai T1 - Transmission Fluctuation Spectrometry in Concentrated Suspensions: Particle-Particle Interaction KW - Partikelmesstechnik Y1 - 2004 ER - TY - CHAP A1 - Stommel, Yves-Gorat A1 - Riebel, Ulrich T1 - Characteristics of a new aerosol dilution system for volumetric flow rates between 0,2 and 1 l/min KW - Aerosol KW - Probenahme Y1 - 2004 ER - TY - CHAP A1 - Guo, Xiaoai A1 - Riebel, Ulrich A1 - Shen, Jianqi T1 - Particle Size Analysis by Transmission Fluctuation Spectrometry: Theory and Simulations on the Sparial Correlation Technique KW - Partikelmesstechnik Y1 - 2004 ER - TY - CHAP A1 - Guo, Xiaoai A1 - Riebel, Ulrich T1 - Particle size analysis by transmission fluctuation auto-correlation spectrometry N2 - Vortrag auf GVC-Fachausschusssitzung "Partikelmesstechnik", Braunschweig, 29.-30. März 2004 KW - Partikelmesstechnik Y1 - 2004 ER - TY - JOUR A1 - Shen, Jianqi A1 - Riebel, Ulrich T1 - Transmission fluctuation spectrometry in concentrated suspensions. Part one, Effects of the monolayer structure KW - Extinktion KW - Partikelmesstechnik Y1 - 2004 ER - TY - JOUR A1 - Shen, Jianqi A1 - Riebel, Ulrich T1 - Transmission fluctuation spectrometry in concentrated suspensions. Part two, Particle overlapping KW - Extinktion KW - Partikelmesstechnik Y1 - 2004 ER - TY - JOUR A1 - Shen, Jianqi A1 - Riebel, Ulrich T1 - Transmission Fluctuation Spectrometry in Concentrated Suspensions. Part Three: Measurements KW - Extinktion KW - Partikelmesstechnik Y1 - 2005 ER - TY - JOUR A1 - Mnich, Robert A1 - Riebel, Ulrich T1 - GVC-Fachausschuss "Gasreinigung" Y1 - 2004 ER - TY - CHAP A1 - Leubner, Holger A1 - Riebel, Ulrich T1 - Charakterisierung und Vergleichbarkeit von Abreinigungsimpulsen KW - Filter KW - Filtration KW - Gasreinigung KW - Abreinigung Y1 - 2002 ER - TY - PAT A1 - Riebel, Ulrich T1 - Vorrichtung zum Abreinigen von Elektroabscheidern und Verfahren zum Betreiben der Vorrichtung N2 - Deutsche Patentanmeldung DBPA 103 00 549.8, vom 09.01.2003 KW - Abreinigung KW - Elektroabscheider Y1 - 2003 ER - TY - PAT A1 - Riebel, Ulrich T1 - Vorrichtung und Verfahren zur kombinierten Abscheidung von Aerosolen, gasförmigen Komponenten und Gerüchen (Bio-elektrischer Geruchsabscheider) N2 - Deutsche Patentanmeldung DBPA 103 19 351.0, vom 29.04.2003 KW - Geruchsabscheidung KW - Aerosole Y1 - 2003 ER - TY - JOUR A1 - Leubner, Holger A1 - Riebel, Ulrich T1 - Druckstoßabreinigung textiler und starrer Filtermedien: Abreinigungsrelevante Parameter KW - Filter KW - Filtration KW - Filtermedien Y1 - 2003 ER - TY - JOUR A1 - Shen, Jianqi A1 - Riebel, Ulrich T1 - Particle Size Analysis by Transmission Fluctuation Spectrometry: Experimental Results obtained with a Gaussian Beam and Analog Signal Processing KW - Partikelmesstechnik KW - Extinktion Y1 - 2003 ER - TY - JOUR A1 - Leubner, Holger A1 - Riebel, Ulrich T1 - Pulse Jet Cleaning of Textile and Rigid Filter Media - Characteristic Parameters KW - Gas cleaning KW - Regenerable filters KW - Gasreinigung KW - Filterabreinigung Y1 - 2004 ER - TY - JOUR A1 - Stommel, Yves-Gorat A1 - Riebel, Ulrich T1 - A new corona discharge-based aerosol charger for submicron particles with low initial charge KW - aerosols KW - electric charge KW - Aerosole Y1 - 2004 ER - TY - JOUR A1 - Stommel, Yves-Gorat A1 - Riebel, Ulrich T1 - Corona-Neutralisation KW - Aerosole Y1 - 2004 ER - TY - JOUR A1 - Stommel, Yves-Gorat A1 - Riebel, Ulrich T1 - Aerosolneutralisation auf Basis von Corona-Entladung JF - Chemie - Ingenieur - Technik KW - Aerosole KW - Gasreinigung Y1 - 2004 SN - 0009-286X VL - 76 IS - 10 SP - 1512 EP - 1516 ER - TY - JOUR A1 - Stommel, Yves-Gorat A1 - Riebel, Ulrich T1 - Neutralisation von geladenen und ungeladenen sibmikronen Aerosolen mit Hilfe eines Corona-basierten elektrischen Neutralisators KW - Aerosole KW - Gasreinigung Y1 - 2005 ER - TY - CHAP A1 - Stommel, Yves-Gorat A1 - Riebel, Ulrich T1 - A corona-discharge based aerosol neutralisizer designed for use with the SMPS-system KW - Aerosole KW - Neutralisation KW - aerosols KW - neutralization Y1 - 2005 ER - TY - JOUR A1 - Leubner, Holger A1 - Mnich, Robert A1 - Riebel, Ulrich T1 - Precoatfiltration zur gleichzeitigen Abscheidung von Stäuben und sauren Gasen KW - Gasreinigung KW - Sorption Y1 - 2005 ER - TY - CHAP A1 - Shen, Jianqi A1 - Riebel, Ulrich A1 - Guo, Xiaoai T1 - Transmission Fluctuation Spectrometry with Spatial Correlation KW - Particle size analysis KW - multiphase flows KW - Partikelmesstechnik KW - Mehrphasenströmungen Y1 - 2005 ER - TY - JOUR A1 - Shen, Jianqi A1 - Guo, Xiaoai A1 - Riebel, Ulrich T1 - Measurements of particle-size distribution and concentration by transmission fluctuation spectrometry with temporal correlation KW - particle-size KW - transmission KW - spectrometry Y1 - 2005 ER - TY - JOUR A1 - Shen, Jianqi A1 - Riebel, Ulrich T1 - Scattering and Transmission by a Monolayer of Spheres: A Study on the Monolayer Structure KW - Particle-size KW - scattering KW - transmission Y1 - 2006 ER - TY - CHAP A1 - Guo, Xiaoai A1 - Riebel, Ulrich T1 - A TFS-based Technique for Measuring Particle Size Distribution and Concentration in Flowing Suspensions T2 - Fachtagung "Lasermethoden in der Strömungsmesstechnik", 6. – 8. September 2005, BTU Cottbus KW - particle size KW - suspension KW - particle concentration Y1 - 2005 UR - http://www.gala-ev.org/images/Beitraege/Beitraege%202005/pdf/45.pdf SP - 45-1 EP - 45-8 ER - TY - CHAP A1 - Stommel, Yves-Gorat A1 - Riebel, Ulrich T1 - Regelung eines auf Corona-Entladung basierten Aerosolneutralisators für die Anwendung in SMPS-Systemen N2 - Vortrag auf VDI-GVC-Fachausschuss Partikelmesstechnik 2006, Clausthal-Zellerfeld. KW - Aerosolneutratisation KW - corona Y1 - 2006 ER - TY - CHAP A1 - Stommel, Yves-Gorat A1 - Riebel, Ulrich T1 - Simulation der Partikelaufladung und -bewegung in einem Aerosolraum N2 - Vortrag auf VDI-GVC-Fachausschuss Gasreinigung 2006, Würzburg. KW - Partikelaufladung KW - Aerosolneutralisation KW - Simulation Y1 - 2006 ER - TY - CHAP A1 - Mnich, Robert A1 - Riebel, Ulrich T1 - Verbesserung der Quervermischung in einem biologisch-elektrischen Geruchsabscheider durch den elektrischen Wind N2 - Vortrag auf VDI-GVC-Fachausschuss Gasreinigung 2006, Würzburg. KW - Geruch KW - bio-elektrischer Geruchsabscheider Y1 - 2006 ER - TY - JOUR A1 - Stommel, Yves-Gorat A1 - Kirchhoff, Matthias A1 - Riebel, Ulrich T1 - Experimental results on the influence of concentrated liquid aerosols on the onset voltage of corona discharge KW - Aerosol KW - Corona discharge Y1 - 2006 ER - TY - JOUR A1 - Guo, Xiaoai A1 - Riebel, Ulrich T1 - Theoretical direct correlation function for two- dimensional fluids of monodisperse hard spheres Y1 - 2006 ER - TY - CHAP A1 - Lübbert, Christian A1 - Riebel, Ulrich T1 - Untersuchungen zu einem interferometrischen Streulichtmessverfahren zur Erfassung feinster Partikel N2 - Vortrag auf VDI-GVC-Fachausschuss Partikelmesstechnik 2006, Clausthal-Zellerfeld KW - Streulichmessung KW - feinste Partikel Y1 - 2006 ER - TY - CHAP A1 - Guo, Xiaoai A1 - Riebel, Ulrich A1 - Gellert, Marcus T1 - Experimental Investigation of Multiphase Flow Structure behind Bluff Body by LDA and TFS Technique N2 - Vortrag auf Kongress GALA 2006, Sept. 2006 KW - TFS KW - Multiphase flow Y1 - 2006 ER - TY - CHAP A1 - Guo, Xiaoai A1 - Riebel, Ulrich A1 - Gellert, Marcus A1 - Egbers, Christoph T1 - Experimental Investigation of Multiphase Flow Structure behind a Bluff Body by LDV and TFS Technique Y1 - 2006 ER - TY - CHAP A1 - Mnich, Robert A1 - Riebel, Ulrich T1 - Abscheidung von organischen Komponenten im Elektroabscheider durch Ozonolyse KW - biologische Abgasreinigung Y1 - 2007 ER - TY - JOUR A1 - Sommel, Yves-Gorat A1 - Riebel, Ulrich T1 - Comment on the Calculation of the Steady-State Charge Distribution on Aerosols <100 nm by Three Body Trapping Method in a Bipolar Ion Environment KW - Aerosol Y1 - 2007 ER - TY - GEN A1 - Morales Henríques, Carlos Javier A1 - Riebel, Ulrich A1 - Padrón, Alida A1 - Zuniga, Percy A1 - Sorrentino, José T1 - Use of Video Enhanced Microscopy for Characterization of Solid-Liquid-Liquid Mixtures Y1 - 2008 ER - TY - GEN A1 - Shen, Jianqi A1 - Yu, Bin A1 - Riebel, Ulrich A1 - Xu, Yamin A1 - Liu, Lei A1 - Guo, Xiaoai T1 - Fundamentals of Particle Size Analysis by Fluctuating Transmission Autocorrelation with an Extremely Narrow Beam Y1 - 2008 U6 - https://doi.org/10.1016/j.measurement.2006.11.021 ER - TY - JOUR A1 - Mnich, Robert A1 - Riebel, Ulrich A1 - Toshev, Plamen T1 - Bio-elektrische Gasreinigung mit "BEGA" KW - biologische Gasreinigung Y1 - 2008 ER - TY - CHAP A1 - Guo, Xiaoai A1 - Riebel, Ulrich T1 - Transmission Fluctuation Correlation Spectrometry for Measuring Particle Suspension and Flow Structures Y1 - 2007 ER - TY - CHAP A1 - Guo, Xiaoai A1 - Riebel, Ulrich T1 - Transmission Fluctuation Correlation Properties of Radiation through a Two-dimensional Hard-Sphere Monolayer, Poster. Y1 - 2007 ER - TY - CHAP A1 - Riebel, Ulrich A1 - Mnich, Robert A1 - Toshev, Plamen T1 - Biological-Electrical Gas Cleaner BEGA Y1 - 2007 ER - TY - CHAP A1 - Guo, Xiaoai A1 - Riebel, Ulrich T1 - Characterization of Multiphase Flow Structures and Particle Sizing by Evaluation of Statistical Light Transmission Fluctuation Y1 - 2007 ER - TY - VIDEO A1 - Riebel, Ulrich T1 - Demonstration der Feinstaubentstehung beim Betrieb von offenen Feuerstellen N2 - Auftritt im Regionalfernsehen RBB, April 2007 Y1 - 2007 ER - TY - CHAP A1 - Zanoun, El-Sayed A1 - Egbers, Christoph A1 - Guo, Xiaoai A1 - Riebel, Ulrich T1 - Experimental and Numerical Investigations of Isothermal Fluid-Particle Flows in Vertical Cuvette Y1 - 2007 ER - TY - JOUR A1 - Xu, Yamin A1 - Shen, Jianqi A1 - Cai, Xiaoshu A1 - Riebel, Ulrich A1 - Guo, Xiaoai T1 - Particle size analysis by transmission fluctuation spectrometry with band-pass filters N2 - particle size analysis transmission filter Y1 - 2008 ER - TY - GEN A1 - Bin, Yu A1 - Shen, Jianqi A1 - Xu, Yamin A1 - Riebel, Ulrich A1 - Guo, Xiaoai T1 - Mesurements on Particle Size Distribution and Concentration by Transmission Fluctuation Spectrometry with Temporal Correlation (TFS-TC). KW - Transmission Fluctuation Spectrometry Y1 - 2008 U6 - https://doi.org/10.1002/ppsc.200701128 ER - TY - JOUR A1 - Guo, Xiaoai A1 - Riebel, Ulrich T1 - Suspension Structure Effects on Transmission Fluctuation Spectrometry with Autocorrelation: Theoretical Prediction, Numerical Simulation and Experimental Verification KW - Transmission Fluctuation Spectrometry KW - Autocorrelation Y1 - 2008 N1 - Part. Part. Syst. Charact. ER - TY - GEN A1 - Morales Henríques, Carlos Javier A1 - Riebel, Ulrich A1 - Zavarce, L. A1 - Guzmán, N. M. T1 - Improving emulsion separation: the collector material concept KW - Emulsion KW - seperation Y1 - 2009 UR - Lat. Am. Appl. Res. 2009. http://www.laar.uns.edu.ar/accepted_Papers.htm. N1 - Lat. Am. Appl. Res. 2009. http://www.laar.uns.edu.ar/accepted_Papers.htm ER - TY - CHAP A1 - Riebel, Ulrich A1 - Wang, Shaoliang T1 - Ein selbsttest-fähiges Streulicht-Zählverfahren. Processnet FA Partikelmesstechnik N2 - Vortrag auf Processnet FA Partikelmesstechnik, 08.-10.03.2010 in Karlsruhe KW - Partikelmesstechnik KW - Streulichtmessverfahren Y1 - 2010 N1 - LS MVT ER - TY - CHAP A1 - Lebedynskyy, Volodymyr A1 - Riebel, Ulrich A1 - Junker, Jürgen T1 - Biologische Abgasreinigung mit dem Bioventilator. N2 - Poster auf der Fachtagung "Bioprozessorientiertes Anlagendesign" 10.-12.05.10 in Nürnberg KW - biologische Abgasreinigung Y1 - 2010 N1 - LS MVT ER - TY - CHAP A1 - Lübbert, Christian A1 - Riebel, Ulrich T1 - 1D-Simulation des Corona-Quenchings im Rohrelektroabscheider N2 - Vortrag auf Processnet FA Partikelmesstechnik, 17.-18.03.2010 in Dortmund. KW - Corona-Quenching KW - Elektroabscheider Y1 - 2010 N1 - LS MVT ER - TY - CHAP A1 - Lebedynskyy, Sergiy A1 - Riebel, Ulrich T1 - Biologische Abgasreinigung mit dem Biobentilator N2 - Vortrag auf Jahrestreffen der Prozessnet-FA "Biokraftstoffe", "Gasreinigung" u. "Paretikelmesstechnik", 30.-31.03.2009, Frankfurt am. M. KW - Abgasreinigung KW - Gerucksabsorption Y1 - 2010 N1 - LS MVT ER - TY - PAT A1 - Riebel, Ulrich A1 - Schwentner, Joachim T1 - Verfahren und Vorrichtung zum Abscheiden hochohmiger Stäube im Elektroabscheider Y1 - 2008 ER - TY - CHAP A1 - Lebedynskyy, Sergiy A1 - Lübbert, Christian A1 - Riebel, Ulrich T1 - Autogenic Space-Charge based Precipitator (ARA) KW - electrostatic precipitator Y1 - 2009 N1 - LS MVT ER - TY - CHAP A1 - Lübbert, Christian A1 - Riebel, Ulrich T1 - Corona-Quenching durch submikrone, hochkonzentrierte Aerosole im turbulenten Rohrelektroabscheider N2 - Vortrag auf Jahrestreffen der Prozessnet-FA "Biokraftstoffe", "Gasreinigung" u. "Paretikelmesstechnik", 30.-31.03.2009, Frankfurt am. M. KW - corona-Quenching KW - Aerosole KW - Elektroabscheider Y1 - 2009 N1 - LS MVT ER - TY - CHAP A1 - Lebedynskyy, Sergiy A1 - Riebel, Ulrich A1 - Mnich, Robert T1 - Autogener Raumladungs-Abscheider ARA N2 - Vortrag Jahrestreffen der Prozessnet-FA "Biokraftstoffe", "Gasreinigung" u. "Partikelmesstechnik", 30.-31.03.2009, Frankfurt am. M. KW - Raumladung KW - Elektroabscheider Y1 - 2009 N1 - LS MVT ER - TY - CHAP A1 - Lübbert, Christian A1 - Riebel, Ulrich T1 - Electrostatic Precipitator Operation at Corona Quenching Conditions - Theory, Simulation and Experiments KW - Corona Quenching Y1 - 2011 ER - TY - CHAP A1 - Riebel, Ulrich T1 - Design and Evaluation of Small Electrostatic Precipitators Y1 - 2011 ER - TY - CHAP A1 - Lübbert, Christian A1 - Riebel, Ulrich T1 - Modelle zu Beschreibung Staubabscheidung im Rohr-Draht-Elektroabscheider bei hohen teilchengebundenen Raumladungsdichten Y1 - 2010 ER - TY - CHAP A1 - Riebel, Ulrich T1 - Sampling and Measurement of Charged Aerosols. Aerosol Sampling and Measurement behind ESP's KW - Aerosol Y1 - 2010 ER - TY - GEN A1 - Riebel, Ulrich T1 - Gasreinigung - Neue Herausforderungen und neue Erkenntnisse für Filter, Wäscher und Co. KW - Gasreinigung KW - Filter KW - Wäscher Y1 - 2010 ER - TY - GEN A1 - Lübbert, Christian A1 - Riebel, Ulrich T1 - Electrostatic Precipitator Operation at Corona Quenching Conditions - Theory, Simulation and Experiments KW - Corona Quenching KW - Electrostatic precipitation Y1 - 2011 ER - TY - GEN A1 - Lübbert, Christian A1 - Riebel, Ulrich T1 - Corona Quenching - Elektroabscheider bei hohen Aerosolkonzentrationen KW - Corona Quenching KW - Aerosol KW - Elektroabscheider Y1 - 2011 ER - TY - GEN A1 - Riebel, Ulrich A1 - Lübbert, Christian A1 - Lebedynskyy, Sergiy T1 - Elektroabscheider – es gibt noch viel zu tun T2 - Chemie Ingenieur Technik KW - Elektroabscheider; Quench Y1 - 2012 SN - 0009-286X VL - 84 IS - 7 SP - 1099 EP - 1113 ER - TY - CHAP A1 - Aleksin, Yury A1 - Riebel, Ulrich A1 - Vora, Alpesh Laxman T1 - A New Understanding of Electrical Conduction through Highly Resistive Dusts and the Mechanism of Back Corona in Electrostatic Precipitators T2 - Partec 2013 Conference, April 23rd – 25th, 2012 Nürnberg Messe KW - Electrostatic Precipitators; Dust Y1 - 2013 UR - http://reg.mcon-mannheim.de/onlineprogramm-mmv/index.aspx?kongressid=53&Speach=ENG ER - TY - CHAP A1 - Vora, Alpesh Laxman A1 - Riebel, Ulrich T1 - Experimental study and numerical modeling of a microscopic level charge transport in high resistive single particle-particle contact and contact gap T2 - Partec 2013 Conference, April 23rd – 25th, 2012 Nürnberg Messe KW - charge transport in high resistive material KW - charge injection KW - drift-diffusion model Y1 - 2013 UR - http://reg.mcon-mannheim.de/onlineprogramm-mmv/index.aspx?kongressid=53&Speach=ENG ER - TY - CHAP A1 - Perwin, Jörg A1 - Riebel, Ulrich T1 - Optical Measurement Technique for In-situ Observation of Nanoparticle Precipitation in Plug Flow Reactors T2 - Partec 2013 Conference, April 23rd – 25th, 2012 Nürnberg Messe KW - Nanoparticles KW - Optical Measurement KW - In-situ Observation Y1 - 2013 UR - http://reg.mcon-mannheim.de/onlineprogramm-mmv/index.aspx?kongressid=53&Speach=ENG ER - TY - CHAP A1 - Lübbert, Christian A1 - Riebel, Ulrich T1 - Cleaning of Problem Aerosols: Modeling of Electrostatic Precipitator Operation with Corona Quenching T2 - Partec 2013 Conference, April 23rd – 25th, 2012 Nürnberg Messe KW - Electrostatic Precipitator KW - Corona Quenching Y1 - 2013 UR - http://reg.mcon-mannheim.de/onlineprogramm-mmv/index.aspx?kongressid=53&Speach=ENG ER - TY - PAT A1 - Riebel, Ulrich A1 - Lebedynskyy, Volodymyr T1 - Selbstregulierender bipolarer Agglomerator N2 - Europäisches Patent: Selbstregulierender bipolarer Agglomerator KW - Aerosole KW - Elektroabscheider KW - Agglomeration Y1 - 2013 ER - TY - PAT A1 - Riebel, Ulrich A1 - Aleksin, Yury T1 - Niederfrequent betriebener Elektroabscheider für hochohmige Stäube N2 - Deutsches Patent: Niederfrequent betriebener Elektroabscheider für hochohmige Stäube KW - Elektroabscheider KW - hochohmige Stäube Y1 - 2014 ER - TY - GEN A1 - Riebel, Ulrich A1 - Aleksin, Yury A1 - Vora, Alpesh Laxman T1 - Das Verhalten hochohmiger Stäube T2 - Chemie-Ingenieur-Technik KW - hochohmige Stäube Y1 - 2013 SN - 1522-2640 SN - 0009-286X VL - 85 IS - 3 SP - 235 EP - 244 ER - TY - CHAP A1 - Hartmann, Ingo A1 - Riebel, Ulrich A1 - Matthes, Mirjam A1 - Thiel, Christian A1 - Kohler, Heinz A1 - Groll, Andreas ED - Thrän, Daniela T1 - Demonstration von Maßnahmen zur Emissionsminderung an Biomasse-Kleinfeuerungen T2 - Effizient, umweltverträglich, dezentral - Neue Konzepte für die Nutzung von biogenen Festbrennstoffen, Teil 2 N2 - Maßnahmen zur Emissionsminderung an Biomasse-Kleinfeuerungen KW - Emissionminderung KW - Biomasse-Kleinfeuerungen Y1 - 2014 SP - 45 EP - 59 PB - DBFZ Leipzig CY - Leipzig ER - TY - GEN A1 - Matthes, Mirjam A1 - Hartmann, Ingo A1 - Groll, Andreas A1 - Riebel, Ulrich T1 - Investigation on application and performance of emission reduction measures at a pellet boiler T2 - Biomass conversion and biorefinery N2 - Investigation on application and performance of emission reduction measures at a pellet boiler KW - biomass Y1 - 2016 U6 - https://doi.org/10.1007/s13399-015-0187-1 SN - 2190-6815 VL - 6 IS - 3 SP - 301 EP - 313 ER - TY - CHAP A1 - Vora, Alpesh Laxman A1 - Riebel, Ulrich T1 - Experimental study and numerical modelling of a microscopic level charge transport in highly resistive dust layers T2 - Book of PARTEC 2016, International Congress on Particle Technology, April 19-21, 2016, Nürnberg, Germany KW - Electrostatic precipitator KW - Back corona KW - Dust resistivity KW - Highly resistive dusts Y1 - 2016 SN - 978-3-18-092283-6 SP - S. 579 PB - VDI Verlag CY - Düsseldorf ER - TY - CHAP A1 - Aleksin, Yury A1 - Riebel, Ulrich A1 - Kurtsiefer, Stefan T1 - A new approach for the electrostatic precipitation of highly resistive dusts T2 - Book of PARTEC 2016, International Congress on Particle Technology, April 19-21, 2016, Nürnberg, Germany N2 - A new approach for the electrostatic precipitation of highly resistive dusts KW - highly resistive dusts KW - back corona KW - electrostatic precipitator Y1 - 2016 SN - 978-3-18-092283-6 SP - S. 243 PB - VDI Verlag CY - Düsseldorf ER - TY - CHAP A1 - Stepputat, Jan A1 - Riebel, Ulrich A1 - Vora, Alpesh Laxman T1 - Experimental study of charge transport in highly resistive single particle-particle contact and contact gap T2 - Book of PARTEC 2016, International Congress on Particle Technology, April 19-21, 2016, Nürnberg, Germany N2 - Experimental study of charge transport in highly resistive single particle-particle contact and contact gap KW - highly resistive particles KW - electrostatic forces KW - non-ohmic KW - electret Y1 - 2016 SN - 978-3-18-092283-6 SP - S. 379 PB - VDI Verlag CY - Düsseldorf ER - TY - CHAP A1 - Riebel, Ulrich ED - Beckmann, Michael ED - Hurtado, Antonio T1 - Abgasreinigung im Umfeld der Energiewende – neue Aufgaben für den Elektroabscheider? T2 - Kraftwerkstechnik 2016 : Strategien, Anlagentechnik und Betrieb N2 - Abgasreinigung im Umfeld der Energiewende – neue Aufgaben für den Elektroabscheider KW - Elektroabscheider KW - Energiewende Y1 - 2016 SN - 978-3-934409-69-9 SP - 623 EP - 631 PB - SAXONIA CY - Freiberg ER - TY - CHAP A1 - Riebel, Ulrich T1 - Cleaning of highly concentrated aerosols : Electrastatic precipitations vs. bipolar agglomeration T2 - PARTEC 2016,International Congress on Particle Technology, April 19-21, 2016, Nürnberg, Germany, book of abstracts KW - agglomeration KW - electrostatic precipitation KW - dust cleaning Y1 - 2016 SN - 978-3-18-092283-6 PB - VDI-Verl. CY - Düsseldorf ER - TY - CHAP A1 - Riebel, Ulrich A1 - Aleksin, Yury A1 - Vora, Alpesh Laxman T1 - Non-ohmic properties of highly resistive dust layers – experimental studies and numerical modelling under OpenFOAM® T2 - ICESP XIV. International Conference on Electrostatic Precipitation 2016”, Wroclaw, Polen, 19.-23.09.2016 KW - Dust Resistivity Measurement KW - Back Corona KW - Dust Resistivity KW - ESP Y1 - 2016 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:co1-opus4-41823 ER - TY - GEN A1 - Aleksin, Yury A1 - Riebel, Ulrich A1 - Kurtsiefer, Rolf T1 - Abscheidung hochohmiger Stäube in einem Elektroabscheider mit niederfrequenter AC-Hochspannung (NIFRA) T2 - Chemie Ingenieur Technik N2 - Abscheidung hochohmiger Stäube in einem Elektroabscheider mit niederfrequenter AC-Hochspannung (NIFRA) KW - hoch-ohmige Stäube KW - Elektroabscheider KW - Staubwiderstand KW - NIFRA Y1 - 2016 UR - http://onlinelibrary.wiley.com/doi/10.1002/cite.201650129/full U6 - https://doi.org/10.1002/cite.201650129 SN - 1522-2640 VL - 88 IS - 9 SP - 1356 ER - TY - GEN A1 - Bacher, Christian A1 - Riebel, Ulrich A1 - Marschall, Simon A1 - Groll, Andreas T1 - Visualization of submicron aerosol agglomeration by laser-induced fluorescence T2 - Aerosol Science and Technology KW - Aerosol KW - agglomeration Y1 - 2017 U6 - https://doi.org/10.1080/02786826.2017.1339863 SN - 1521-7388 VL - 51 IS - 9 SP - 1093 EP - 1098 ER - TY - GEN A1 - Bacher, Christian A1 - Lebedynskyy, Volodymyr A1 - Riebel, Ulrich A1 - Fischer, Silvio T1 - Electrode Shape and Efficiency in wet wire-tube Electrostatic Precipitators at high aerosol concentration KW - Electrode Shape KW - Electrostatic Precipitator KW - aerosol concentration Y1 - 2017 UR - https://www.researchgate.net/publication/320490412 N1 - Jahrestreffen der ProcessNet-Fachgruppen Abfallbehandlung und Wertstoffrückgewinnung, Energieverfahrenstechnik, Gasreinigung, Hochtemperaturtechnik, Rohstoffe und Kreislaufwirtschaft 21.- 23.03.2017, DECHEMA-Haus, Frankfurt am Main ER - TY - GEN A1 - Aleksin, Yury A1 - Vora, Alpesh Laxman A1 - Riebel, Ulrich T1 - A new understanding of electric conduction in highly resistive dusts and bulk powders T2 - Powder Technology N2 - A new understanding of electric conduction in highly resistive dusts and bulk powders. KW - Dust resistivity KW - Electrets KW - Electrostatic precipitator KW - Highly resistive dusts KW - Back corona KW - Space charge Y1 - 2016 SN - 0032-5910 VL - 294 SP - 353 EP - 364 ER - TY - GEN A1 - Bacher, Christian A1 - Lebedynskyy, Volodymyr A1 - Fischer, Silvio A1 - Riebel, Ulrich T1 - Discharge electrode geometry and energy efficiency in a one-stage wire-tube electrostatic precipitator operating at high concentrations of submicron liquid aerosol T2 - Environmental Technology N2 - In order to help answering the question “Which electrode design is the best?”, the precipitation performance of a tubular ESP was determined for different electrode designs with special attention to specific energy consumption. Experiments were conducted in a wire-tube arrangement with a high loading of liquid submicron particles causing strong space charge effects, also known as corona quenching. The experiments are supplemented by numerical simulation results showing the effect of residence time and power consumption on separation efficiency. KW - gas cleaning KW - electrostatic precipitation KW - energy efficiency KW - electrode design KW - electrode shape KW - corona quenching KW - precipitation performance KW - particle removal Y1 - 2018 U6 - https://doi.org/10.1080/09593330.2018.1555613 SN - 0959-3330 SN - 1479-487X ER - TY - GEN A1 - Vora, Alpesh Laxman A1 - Stepputat, Jan A1 - Riebel, Ulrich T1 - Force and current in a contact gap between single highly resistive, particles: experimental observations T2 - Journal of Physics Communications N2 - In case of electrical conduction through highly resistive dust layers, the generation of electrostatic adhesion force is strongly coupled to the mechanism of electrical (current) transport in the solid. High field strengths lead to a significant increase of the adhesive force. Here, more insight into the underlying mechanisms is given by experiments on the microscopic scale. An experimental arrangement is described which allows to study a particle pair subject to a strong electric field. Both the current and the force between the particles (150 μm) can be measured as a function of voltage and gap distance. The results show an extremely complex behaviour of the contact for the case of highly resistive particles. For current transport, both gas discharges and thermionic field emission are observed, depending on the width of the contact gap and the field strength. For both the force and the current across the gap, a strongly non-linear behaviour with pronounced time effects is observed. KW - electret KW - micro discharge KW - charge trapping KW - Paschen law KW - Thermionic field emission KW - space charge effect KW - particle interaction Y1 - 2019 U6 - https://doi.org/10.1088/2399-6528/ab3e2b SN - 2399-6528 VL - 3 IS - 9 ER - TY - GEN A1 - Vora, Alpesh Laxman A1 - Stepputat, Jan A1 - Riebel, Ulrich T1 - Charge transfer between single highly resistive particles: Experiments and Numerical Simulation T2 - PARTEC, International Congress on Particle Technology, 2019, Nürnberg KW - highly resistive particles KW - Numerical Simulation Y1 - 2019 UR - https://www.partec.info/en/events/vortrag/charge-transfer-between-single-highly-resistive-particles-experiments-and-numerical-simulation/738560 ER - TY - GEN A1 - Medina Méndez, Juan Ali A1 - Schmidt, Heiko A1 - Riebel, Ulrich T1 - Towards a One-Dimensional Turbulence Approach for Electrohydrodynamic Flows T2 - 11th International Symposium on Turbulence and Shear Flow Phenomena (TSFP11), Southampton, UK, July 30 to August 2, 2019 N2 - The One-Dimensional Turbulence model is modified in this work for its application to a classical electrohydrodynamic (EHD) problem. Being the first study case, this work is focused on the influence of electrostatic fields and space charge on the velocity field inside a wire-plate Electrostatic Precipitator (ESP) with one-way-coupling dynamics. The study case is an attempt to replicate velocity profiles and Turbulent Kinetic Energy (TKE) budgets obtained in the Direct Numerical Simulation (DNS) carried out by Soldati and Banerjee (1998). Qualitative trends are confirmed in preliminary ODT results, thus showing the potential of the stochastic ODT modeling approach for other types of EHD flows. Y1 - 2019 UR - http://www.tsfp-conference.org/proceedings/2019/265.pdf ER - TY - GEN A1 - Medina Méndez, Juan Ali A1 - Schmidt, Heiko A1 - Riebel, Ulrich T1 - Towards a One-Dimensional Turbulence Approach for Electrohydrodynamic Flows Y1 - 2019 UR - https://www-docs.b-tu.de/fg-stroemungsmodellierung/public/Medina_2019_TSFPPoster2019.pdf ER - TY - GEN A1 - Medina Méndez, Juan Ali A1 - Schmidt, Heiko A1 - Riebel, Ulrich T1 - Extension of the One-Dimensional Turbulence model towards electrohydrodynamic variable density flows T2 - 17th European Turbulence Conference (ETC2019), 3-6 September 2019, Torino, Y1 - 2019 UR - https://www-docs.b-tu.de/fg-stroemungsmodellierung/public/Medina_2019_ETC2019ODTEHDPlate.pdf CY - Turin ER - TY - GEN A1 - Lebedynskyy, Volodymyr A1 - Riebel, Ulrich A1 - van der Zwaag, Till A1 - Haep, Stefan A1 - Kohnen, Boris T1 - Energetische Optimierung von Elektroabscheidern. Industriebeispiel HKM Duisburg T2 - Jahrestreffen der ProcessNet-Fachgruppen Mechanische Flüssigkeitsabtrennung und Gasreinigung, 14.-15. März 2019, Bamberg N2 - Elektroabscheider bewähren sich in Rauchgasreinigung als sehr robust und zuverlässig. Allerdings werden zahlreiche und nicht immer genau bekannte Parameter für eine sichere Auslegung von Elektroabscheidern benötigt. Eine nachträgliche Veränderung der Betriebsparameter kann zur Minderung der Zuverlässigkeit eines Elektroabscheiders führen. Das Rauchgas aus dem Stahlkonverter (HKM, Duisburg) wird in einem Nass-elektroabscheider von Partikeln befreit. Als HV-Elektroden kommen sog. „high emission electrodes“ zum Einsatz. Diese weisen eine sehr geringe Corona-Einsatz-spannung auf und erschöpfen die Leistungsreserven des HV-Trafos bereits bei mittleren Spannungen. Eine weitere Erhöhung der Spannung ist aufgrund der Strombegrenzung nicht möglich. Eine zweistufige auf das Aerosol abgestimmte HV-Elektrode wird entwickelt und im Technikums-Maßstab ausprobiert. Diese ermöglicht eine äußerst effiziente Nutzung des Corona-Stromes. Die Aufladung von Partikeln erfolgt damit fast ausschließlich im gequenchten Bereich, in dem die Gasionen ihre Ladung fast vollständig auf die Aerosolpartikeln übertragen. Eine deutlich höhere Betriebsspannung kann erreicht werden. Eine originale HKM Elektrode wird einer optimierten im Technikumsversuch gegenübergestellt. Der Betriebspunkt (Spannung und Strom) des HKM Elektro-abscheiders wird durch die Veränderung der Aerosol-Anzahlkonzentration und Größenverteilung nachgebildet. Abscheideleistungen bei einer typischen Betriebs-spannung sowie bei der maximalen Trafo-Leistung von 205 W pro Abscheiderohr werden erfasst. Die Versuche werden durch eigene Simulationsrechnungen unterstützt. Die Simulationsergebnisse stimmen mit den Messergebnissen sehr gut überein. Die optimierte Elektrode bringt folgende Vorteile gegenüber der originalen Elektrode: a) 2/3 der Energie werden bei einer gleichen Abscheidung eingespart. b) 9-fache Verbesserung der Abscheidung bei einem gleichen Energieeintrag. Eine technische Umsetzung der gewonnenen Kenntnisse steht in Aussicht. Y1 - 2019 UR - https://dechema.converia.de/frontend/index.php?page_id=6528 ER - TY - GEN A1 - Bürger, Patrick A1 - Riebel, Ulrich T1 - Characterization of flame-generated SiO2 aerosols and their utilization in research of high temperature electrostatic precipitation: A project outlook T2 - Jahrestreffen der ProcessNet-Fachgruppe Gasreinigung und des TAK Aerosoltechnik N2 - Gas-phase particle separation at significantly elevated temperatures is a scope since heat recovery units might be operated with higher efficiency and lower maintenance costs when fouling by particulate deposits could be reduced. However, this proves difficult for most separation techniques for numerous reasons (particle size limitations, material limitations, pressure difference limitations). While the upper temperature limit for standard electrostatic precipitators (ESP) operated at ambient pressure and with negative polarity is around 400°C, positive polarity theoretically should allow an operation with temperatures well above 600°C. However, there seems to be very little experience with high temperature ESPs even on the lab scale or small pilot scale. To close this apparent gap in electrostatic precipitation research our current project aims to investigate the characteristics of a SiO2 aerosol and the capabilities of an ESP dealing with said SiO2 aerosol at 600°C and above. The aerosol is produced by combustion of silicone oil (HMDSO) in a propane flame which leads to particle size distributions ranging from below 10 nm up to 400 nm. The median value of the distribution and the total number concentration is a function of the gaseous HMDSO amount introduced into the flame. Increasing the HMDSO supply shifts the median to larger particle diameters but also reduces the total number concentration, which is an interesting phenomenon to be looked into in more detail during the project since coagulation cannot explain this on its own. The observed high number concentrations at low HMDSO feed rates may involve thermal rebound which needs further investigation. Additionally, the bipolar charge distribution typical for flame-generated aerosols has to be considered when deriving an explanation for the observations. The next steps will be a more detailed characterization of the produced SiO2 aerosol and the operation of a high temperature ESP in wire-tube geometry. KW - electrostatic precipitation KW - SiO2 aerosols KW - aerosol science Y1 - 2018 U6 - https://doi.org/10.13140/RG.2.2.30701.95209 ER - TY - GEN A1 - Bürger, Patrick A1 - Riebel, Ulrich T1 - Behaviour of a flame-generated SiO2 aerosol in electrostatic precipitators at elevated temperatures: A back-corona investigation T2 - Jahrestreffen der ProcessNet-Fachgruppen Mechanische Flüssigkeitsabtrennung und Gasreinigung N2 - The removal of high-resistivity dusts from gas flows using electrostatic precipitators (ESPs) is challenging and requires counter-measures to suppress back-corona and subsequent particle re-entrainment. The critical dust layer thickness for the occurrence of back-corona may vary by several orders of magnitude depending on the specific dust resistivity, dust layer porosity, particle size, humidity and operating temperature. Despite the difficulties at elevated operating temperatures, processes involving highly resistive dusts (e.g. oxidic materials) may benefit significantly from utilizing high temperature ESPs (HT-ESPs). This is because the specific resistivity of materials like SiO2, Al2O3 and other oxides decreases below the critical value of 10^11 Ω*cm at higher temperatures. Currently, the separation of oxidic nanoparticle products relies on cloth filters which require exhaust gas quenching prior to dust removal. Using heat exchangers instead to recover excess heat is not feasible due to severe scale formation. Therefore, the development of a reliable HT-ESP would allow heat exchange at clean gas conditions reducing operating costs of the overall process. During preliminary experiments for our ongoing investigation of HT-ESPs, the behaviour of a flame-generated SiO2 aerosol was studied at 200°C in a wire-tube configuration. In order to reach a better understanding of the back-corona, measurements of the particle size distribution, particle charge distribution and electric current were conducted for both polarities. Strong effects are found even though the dust layer thickness is a few μm only. While the separation efficiency decreases rapidly after a critical dust layer thickness is reached, the current uptake increases significantly (up to a factor of 20), and a large number of inversely charged particles is found in the clean gas. These effects may indicate a large-scale back-corona. A detailed discussion will be given on the basis of aerosol size and mobility distributions, SEM images and resistivity measurements of the dust layer. We gratefully acknowledge the financial support for this project (EFRE-StaF 23035000) by the European Fund for Regional Development. KW - electrostatic precipitation KW - SiO2 aerosols KW - back corona KW - highly resistive dusts KW - gas cleaning Y1 - 2019 U6 - https://doi.org/10.13140/RG.2.2.34057.39528 ER - TY - GEN A1 - Bürger, Patrick A1 - Riebel, Ulrich T1 - Electrostatic Charging and Precipitation of Nanoparticles in Technical Nitrogen: Highly Efficient Diffusion Charging by Hot Free Electrons T2 - Jahrestreffen der ProcessNet-Fachgruppen Computational Fluid Dynamics und Gasreinigung N2 - Electrostatic charging and deposition of a liquid nano-aerosol was studied in dry air and in technical (3.6 % O2) nitrogen. The experiments have shown that electronic charging of aerosols can be important in technical scale electrostatic precipitators (ESPs). Already at operation voltages just slightly above the corona onset voltage, the contribution of the free electrons to the overall current is estimated to be around 50 %. Due to the high temperature of free electrons, diffusion charging by free electrons allows to reach exceptionally high particle charge and extremely high precipitation efficiency. A strongly simplified theoretical model was developed, which gives a good prediction of particle charge based on averaged values of particle diameter, current density, electric field strength, electron temperature and residence time. The ion mobilities were determined by fitting the current-voltage characteristics with a modified Townsend (Monrolin et al. 2018) equation and are significantly higher than the values typically used to describe diffusion charging in air. This may be ascribed to the very dry gas phase and the short average lifespan of the ions under ESP conditions, which is in the order of 1 ms. From the practical point of view, electronic charging might be relevant in a number of technical applications, including high temperature ESPs, ESP applications in dry and oxygen-free gases and pulsed corona systems. We gratefully acknowledge the financial support for this project (EFRE-StaF 23035000) by the European Fund for Regional Development. Monrolin, N., Praud, O., Plouraboué, F. 2018. Revisiting the positive DC corona discharge theory: Beyond Peek's and Townsend's law. Phys. Plasmas 25, 063503; doi: 10.1063/1.5031780. KW - electrostatic precipitation KW - electronic charging KW - free electrons KW - electron temperature KW - corona discharge KW - diffusion charging Y1 - 2020 U6 - https://doi.org/10.13140/RG.2.2.35735.11687 ER - TY - GEN A1 - Bürger, Patrick A1 - Riebel, Ulrich T1 - Electrostatic charging and precipitation of nanoparticles in technical nitrogen: Highly efficient diffusion charging by hot free electrons T2 - Journal of Aerosol Science N2 - Electrostatic charging and deposition of a liquid nano-aerosol was studied in dry air and in technical (3.6 % O2) nitrogen. The experiments have shown that electronic charging of aerosols can be important in technical scale electrostatic precipitators (ESPs). Already at operation voltages just slightly above the corona onset voltage, the contribution of the free electrons to the overall current is estimated to be around 50 %. Due to the high temperature of free electrons, diffusion charging by free electrons allows to reach exceptionally high particle charge and extremely high precipitation efficiency. A strongly simplified theoretical model was developed, which gives a good prediction of particle charge based on averaged values of particle diameter, current density, electric field strength, electron temperature and residence time. The ion mobilities were determined by fitting the current-voltage characteristics with a modified Townsend (Monrolin et al. 2018) equation and are significantly higher than the values typically used to describe diffusion charging in air. This may be ascribed to the very dry gas phase and the short average lifespan of the ions under ESP conditions, which is in the order of 1 ms. From the practical point of view, electronic charging might be relevant in a number of technical applications, including high temperature ESPs, ESP applications in dry and oxygen-free gases and pulsed corona systems. KW - electrostatic precipitation KW - corona discharge KW - free electrons KW - electron temperature KW - ion mobility KW - diffusion charging Y1 - 2020 U6 - https://doi.org/10.1016/j.jaerosci.2019.105495 SN - 1879-1964 SN - 0021-8502 IS - 141 ER - TY - GEN A1 - Bacher, Christian A1 - Riebel, Ulrich T1 - Investigation of electrohydrodynamically enhanced turbulence in wire-tube electrostatic precipitators for enhanced mass and heat transfer T2 - ICESP 2018, Charlotte, USA, 9-11 October 2018 N2 - Enhanced heat and mass transfer due to electrohydrodynamically induced flow in electrostatic precipitators provides a potential opportunity for versatile new applications in the process industry. After a short review of the physical fundamentals it is explained why measurements of the pressure gradient play an important role in the design principles for this technology. Its external influence by operating parameters like voltage polarity and aerosol conditions will also be shown. In the second part, the feasibility of enhanced mass and heat transfer is demonstrated based on laboratory measurements. In combination with the previously discussed pressure gradient measurements, methods for simplified engineering concepts like equivalent mean flow velocities or turbulent diffusion coefficients are shown. The topic is rounded off by outlining a potential use in decentralized power generation. Y1 - 2018 UR - https://www.isesp.org/education ER - TY - GEN A1 - Bacher, Christian A1 - Riebel, Ulrich A1 - Lebedynskyy, Volodymyr A1 - Fischer, Silvio T1 - Discharge electrode geometries and energy efficiency in one-stage electrostatic precipitators at high aerosol concentration T2 - ICESP 2018, Charlotte, USA, 9-11 October 2018 N2 - In order to help answering the question “Which electrode design is the best?”, the precipitation performance of a tubular ESP was determined for different electrode designs with special attention to specific energy consumption. Experiments were conducted in a wire-tube arrangement with a high loading of liquid submicron particles. The experiments are supplemented by numerical simulation results showing the effect of residence time and power consumption on separation efficiency. By combining the own experimental results with seemingly contradicting statements of the literature, the authors provide also some general guidelines for discharge electrode design when designing or upgrading electrostatic precipitator plants. Y1 - 2018 UR - https://www.isesp.org/education ER -