P1.5.2 Combined Amperometric/Field-Effect Sensor for the Detection of Dissolved Hydrogen in Biogas Reactors

Event
14th International Meeting on Chemical Sensors - IMCS 2012
2012-05-20 - 2012-05-23
Nürnberg/Nuremberg, Germany
Chapter
P1.5 FET-based Sensors
Author(s)
C. Huck, A. Poghossian, M. Schöning - Institute of Nano- and Biotechnologies (INB), Aachen University of Applied Sciences (Germany) and Peter Grünberg Institute (PGI-8), Research Centre Jülich GmbH (Germany), P. Wagner - Institute for Materials Research (IMO), Hasselt University (Belgium)
Pages
1028 - 1031
DOI
10.5162/IMCS2012/P1.5.2
ISBN
978-3-9813484-2-2
Price
free

Abstract

A one-chip integrated combined amperometric/field-effect sensor for monitoring the dissolved hydrogen (H2) concentration has been developed for biogas applications. The combination of two different transducer principles might allow a more accurate and reliable measurement of dissolved H2 as an early warning indicator of digester failures. The proposed approach has been demonstrated by simultaneous amperometric/field-effect measurements of dissolved H2 concentration in electrolyte solutions. Both, the amperometric and the field-effect transducer show a linear response in the H2 concentration range from 0.1 to 3% v/v with a slope of 198.4 ± 13.7 nA / %v/v and 14.9 ± 0.5 mV / %v/v, respectively.

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