3.3.4 Development and characterization of a highly selective hydrogen sensor system

20. GMA/ITG-Fachtagung Sensoren und Messsysteme 2019
2019-06-25 - 2019-06-26
Nürnberg, Germany
3.3 Sensoren für eine moderne Wasserstoffwirtschaft
P. Sood, J. Zosel, M. Mertig, W. Oelßner, A. Klockow - Kurt-Schwabe-Institut für Mess- und Sensortechnik e.V. Meinsberg, Wladheim (Deutschland), O. Herrmann, M. Woratz - ACI Analytical Control Instruments GmbH, Berlin (Deutschland)
264 - 270


Distributed use of hydrogen (H2) has grown with its increasing application in the mobility and energy sector. The need for highly sensitive, selective, long-term stable and miniaturized H2 sensor systems is essential for the safety and quality management of a future H2 supply chain. The present contribution reports on the development and characterization of a H2 sensor system based on a solid-electrolyte flow-through cell (8 mol.-% yttria-stabilized zirconia, YSZ) operated in coulometric mode and combined with gas chromatographic (GC) pre-separation. Miniaturization of system components and results on parametric characterization are provided. A valve injection system for gas sampling was developed as a stainless steel 3D-printed valve manifold with miniaturized solenoid valves. The GC column oven (heating/cooling module) was accomplished using resistive heating and forced convective cooling of an cylindrical carrier. Both design concepts are reported together with results of their performance. A commercial solid electrolyte coulometric detector (SEC) was characterized under different operating conditions, i.e. at different detector temperatures, oxygen partial pressures, injected H2 concentrations and carrier gas flowrates, to gain insights into the essential sensor parameters like H2 peak attributes, accuracy and long-term stability.