Open AccessEffect of internal hydrocarbon reforming during coupled operation of a biomass gasifier with hot gas cleaning and SOFC stacks
Author(s) -
Fischer Felix,
Hauser Michael,
Hauck Maximilian,
Herrmann Stephan,
Fendt Sebastian,
Jeong Hyeondeok,
Lenser Christian,
Menzler Norbert H.,
Spliethoff Hartmut
Publication year - 2019
Publication title -
energy science and engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.638
H-Index - 29
ISSN - 2050-0505
DOI - 10.1002/ese3.334
Subject(s) - anode , stack (abstract data type) , syngas , wood gas generator , materials science , tar (computing) , solid oxide fuel cell , renewable energy , hydrocarbon , chemical engineering , waste management , environmental science , chemistry , electrode , catalysis , organic chemistry , engineering , electrical engineering , computer science , programming language , coal
In the context of energy transition and climate change, a combination of highly efficient modern solid oxide fuel cells ( SOFC ) and thermo‐chemical conversion of biogenic residues could complement other intermittent renewable sources such as wind and solar. In order to reduce required gas cleaning efforts and to increase the process efficiency, the influence of hydrocarbons on SOFC performance is experimentally investigated in this study. For the first time, the operation of Ni/ YSZ anode‐supported cells in Jülich F10 stacks is performed with pre‐reformed and with bio‐syngas containing full hydrocarbon content at realistic current densities. Sulfur and other impurities were removed in both cases. No degradation could be observed within normal operation on clean gas. With the tar reformer bypassed, the pressure drop over the stack increased due to severe carbon deposition on the anode substrate and the nickel current collector mesh inside the SOFC stack, so that operation had to be terminated after five hours. This behavior is different from single‐cell tests, where electrochemical degradation is the limiting factor. The results show that improvements are not only necessary for cell materials and that future research must also consider other stack components.