The objective of the proposed anode-offgas recycling (AOGR) concept is to increase the overall electrical efficiency of a propane-based power system with a 300 Wel solid oxide fuel cell (SOFC) stack beyond normal system configuration with partial oxidation (POX) to syngas. Recycling the anode-offgas partially into the reformer provides steam, carbon dioxide and heat for a combined endothermic steam and dry reforming of the propane, thus replacing the POX reaction. Compared to POX mode, the AOGR concept yields considerably more fuel gas for the SOFC from the same amount of propane. The generated fuel gas is nitrogen-free, thus increasing the SOFC performance additionally. An innovative reformer/burner-reactor allows the internal usage of the anode-offgas heat without additional heat transfer units. The hot-gas injector uses the propane bottle pressure to recycle anode-offgas to the reformer. The transition from POX mode, necessary for the system startup, to the AOGR mode requires enhanced control strategies, developed with the support of dynamic simulation. Critical parameters for the system are the minimal oxygen to carbon (O/C) ratio for carbon-free reformer operation, the SOFC power output and fuel utilization, and the injector performance at a given system backpressure. The concept implementation by an interdisciplinary team of researchers resulted in evaluated process units like injector, reformer, SOFC stack, a dynamic model and controls. The experimental investigation of the whole system will follow soon.
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ASME 2009 7th International Conference on Fuel Cell Science, Engineering and Technology
June 8–10, 2009
Newport Beach, California, USA
Conference Sponsors:
- Advanced Energy Systems Division
ISBN:
978-0-7918-4881-4
PROCEEDINGS PAPER
Using Anode-Offgas Recycling for a Propane Operated Solid Oxide Fuel Cell
Ralph-Uwe Dietrich,
Ralph-Uwe Dietrich
CUTEC-Institut GmbH, Clausthal-Zellerfeld, Germany
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Andreas Lindermeir,
Andreas Lindermeir
CUTEC-Institut GmbH, Clausthal-Zellerfeld, Germany
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Jana Oelze,
Jana Oelze
CUTEC-Institut GmbH, Clausthal-Zellerfeld, Germany
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Christian Spitta,
Christian Spitta
Zentrum fu¨r Brennstoffzellentechnik (ZBT) GmbH, Duisburg, Germany
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Michael Steffen,
Michael Steffen
Zentrum fu¨r Brennstoffzellentechnik (ZBT) GmbH, Duisburg, Germany
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Shaofei Chen,
Shaofei Chen
Institut fu¨r Wa¨rme- und Brennstofftechnik der Technische Universita¨t Braunschweig (IWBT), Braunschweig, Germany
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Christian Schlitzberger
Christian Schlitzberger
Institut fu¨r Wa¨rme- und Brennstofftechnik der Technische Universita¨t Braunschweig (IWBT), Braunschweig, Germany
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Ralph-Uwe Dietrich
CUTEC-Institut GmbH, Clausthal-Zellerfeld, Germany
Andreas Lindermeir
CUTEC-Institut GmbH, Clausthal-Zellerfeld, Germany
Jana Oelze
CUTEC-Institut GmbH, Clausthal-Zellerfeld, Germany
Christian Spitta
Zentrum fu¨r Brennstoffzellentechnik (ZBT) GmbH, Duisburg, Germany
Michael Steffen
Zentrum fu¨r Brennstoffzellentechnik (ZBT) GmbH, Duisburg, Germany
Shaofei Chen
Institut fu¨r Wa¨rme- und Brennstofftechnik der Technische Universita¨t Braunschweig (IWBT), Braunschweig, Germany
Christian Schlitzberger
Institut fu¨r Wa¨rme- und Brennstofftechnik der Technische Universita¨t Braunschweig (IWBT), Braunschweig, Germany
Paper No:
FuelCell2009-85043, pp. 217-223; 7 pages
Published Online:
February 17, 2010
Citation
Dietrich, R, Lindermeir, A, Oelze, J, Spitta, C, Steffen, M, Chen, S, & Schlitzberger, C. "Using Anode-Offgas Recycling for a Propane Operated Solid Oxide Fuel Cell." Proceedings of the ASME 2009 7th International Conference on Fuel Cell Science, Engineering and Technology. ASME 2009 7th International Conference on Fuel Cell Science, Engineering and Technology. Newport Beach, California, USA. June 8–10, 2009. pp. 217-223. ASME. https://doi.org/10.1115/FuelCell2009-85043
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