35633
2016
eng
1074
1078
4
3
article
Elsevier Ltd.
1
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Inverse calibration routine for linear soil gas sensors
Gas sensors in linear form based on the measuring principle of gas selective permeability through a membrane were developed and introduced for the detection and quantification of gas concentrations. A current field study focuses on measuring CO2 concentrations for a spatially distributed monitoring of subsurface CO2 gas storage sites in near real time. A 400 m² test site and a corresponding laboratory system were built up to characterize, validate, and optimize the sensor. A calibration routine was developed, which can be applied subsequently to underground installation. First measurement results indicate the potential of the method.
Materials Today: Proceedings
doi:10.1016/j.matpr.2016.03.051
http://www.sciencedirect.com/science/article/pii/S221478531600256X
2214-7853
32nd Danubia Adria Symposium on Advances in Experimental Mechanics
Starý Smokovec, Slovakia
22.09.2015
25.09.2015
05.09.2016
Patrick P. Neumann
S. Ebert
D. Lazik
Matthias Bartholmai
eng
uncontrolled
Linear sensor
eng
uncontrolled
Distributed sensor
eng
uncontrolled
Subsurface monitoring
eng
uncontrolled
Gas storage areas
eng
uncontrolled
Membrane-based gas sensing
eng
uncontrolled
Calibration
Analytische Chemie
Angewandte Physik
Sanitär- und Kommunaltechnik; Umwelttechnik
Verlagsliteratur
Datei im Netzwerk der BAM verfügbar ("Closed Access")
35425
2016
eng
330
341
47
2016
article
Elsevier B.V.
1
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Characteristic length measurement of a subsurface gas anomaly - A monitoring approach for heterogeneous flow path distributions
Geogenic gases from natural sources, carbon dioxide (CO2) from a geological repository (carbon capture and storage - CCS) or a leaking gas pipeline can present serious risks in industrial and urban areas. To extend the lead time for risk treatment in such critical regions, reliable detection of gases within the shallow subsurface is required to observe critical gas accumulations before degassing into the atmosphere.
A near real-time monitoring approach is introduced to determine the volumetric expansion of a leakinggas in the subsurface. Considering the pressure relaxation with the ambient air pressure, the approach enables the forecasting of the final size of a pressurized gas body in terms of characteristic lengths. According to theoretical basics, such a characteristic length, which enables us to perform a gas (safety) measurement based on a purely geometrical measure, behaves independently of subsurface properties,i.e., it enables a reliable quantification of the escaping gas irrespective of its heterogeneous or changingflow path distribution. A field test for a 10 l/min pinhole leakage injected into a 10 m long, 0.4 m wide, 0.95 m deep soil-filled trench that was equipped with linear sensors shows the lateral-vertical volumetric gas expansion along these sensors, and demonstrates the applicability of the characteristic length approach.
International Journal of Greenhouse Gas Control
10.1016/j.ijggc.2016.02.008
1750-5836
20.07.2016
D. Lazik
S. Ebert
Patrick P. Neumann
Matthias Bartholmai
eng
uncontrolled
Monitoring
eng
uncontrolled
Carbon capture and storage
eng
uncontrolled
Leakage
eng
uncontrolled
Quantification
eng
uncontrolled
Subsurface
eng
uncontrolled
CO2
Angewandte Physik
Verlagsliteratur
Datei im Netzwerk der BAM verfügbar ("Closed Access")