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Chemically unstable gases - flammability of ethylene oxide mixtures in sterilization processes

  • For the assessment of explosion hazards by industrial sterilization processes with ethylene oxide (EO), the flammability regions of 3-component systems EO/nitrogen/air, EO/carbon dioxide/air and EO/water vapor/air were determined. The tests were performed at temperatures of 20 °C and 100 °C and at pressures of 40 kPa and 100 kPa in accordance with the standard test method EN 1839-B. The observed flammability regions are similar in shape and typical for mixtures with ethylene oxide. According to the molecular heat capacities the regions get larger with nitrogen and smaller with carbon dioxide. They become larger with increasing pressure and increasing temperature. Using experimental data a semi-empirical model was created that allows the calculation of flammability limits of process gases in sterilization processes. Such process gases can consist of EO, nitrogen, carbon dioxide, water vapor and air. The model is based on the assumption that the adiabatic flame temperatures along theFor the assessment of explosion hazards by industrial sterilization processes with ethylene oxide (EO), the flammability regions of 3-component systems EO/nitrogen/air, EO/carbon dioxide/air and EO/water vapor/air were determined. The tests were performed at temperatures of 20 °C and 100 °C and at pressures of 40 kPa and 100 kPa in accordance with the standard test method EN 1839-B. The observed flammability regions are similar in shape and typical for mixtures with ethylene oxide. According to the molecular heat capacities the regions get larger with nitrogen and smaller with carbon dioxide. They become larger with increasing pressure and increasing temperature. Using experimental data a semi-empirical model was created that allows the calculation of flammability limits of process gases in sterilization processes. Such process gases can consist of EO, nitrogen, carbon dioxide, water vapor and air. The model is based on the assumption that the adiabatic flame temperatures along the boundary curves of a flammability region have a certain temperature profile that is nearly independent of the type of the inert gas. The adiabatic flame temperatures were calculated by using the “Gaseq” Code. Using a temperature profile calculated from only one experimental system EO/inert gas/air it is possible to predict the flammability limits of systems with other inert gases or of process gases containing several inert gases.zeige mehrzeige weniger

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Metadaten
Autor*innen:Volkmar Schröder, Enis AskarORCiD, Hatice Aydan Acikalin, J. Steinbach
Dokumenttyp:Beitrag zu einem Sammelband
Veröffentlichungsform:Verlagsliteratur
Sprache:Englisch
Titel des übergeordneten Werkes (Englisch):Proceedings of the 2008 AIChE Spring National Meeting
Jahr der Erstveröffentlichung:2008
Herausgeber (Institution):American Institute of Chemical Engineers
Verlag:AIChE
Verlagsort:New York
Ausgabe/Heft:247
Erste Seite:1
Letzte Seite:8
Freie Schlagwörter:Explosion protection; Flammability limits; Gas mixtures; Process safety; Sterilization
Veranstaltung:AIChE 100 - Spring National Meeting
Veranstaltungsort:New Orleans, Louisiana, USA
Beginndatum der Veranstaltung:2008-04-06
Enddatum der Veranstaltung:2008-04-10
ISBN:978-0-8169-1023-6
Bemerkung:
Serientitel: P / AIChE, American Institute of Chemical Engineers – Series title: P / AIChE, American Institute of Chemical Engineers
Verfügbarkeit des Dokuments:Physisches Exemplar in der Bibliothek der BAM vorhanden ("Hardcopy Access")
Bibliotheksstandort:Sonderstandort: Publica-Schrank
Datum der Freischaltung:19.02.2016
Referierte Publikation:Nein
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