Journal
CHEMPLUSCHEM
Volume 86, Issue 6, Pages 889-903Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/cplu.202100196
Keywords
biogas; carbon dioxide methanation; heterogeneous catalysis; microchannel reactors; nickel
Categories
Ask authors/readers for more resources
The study reported direct methanation of CO2 over ceria- and alumina-supported nickel catalysts in the feed stream containing methane and traces of H2S. The results showed that ceria-supported nickel catalyst exhibited higher conversion at 350 degrees Celsius, while the introduction of trace amounts of H2S led to rapid decrease in CO2 conversion and CH4 selectivity.
Direct methanation of CO2 over ceria- and alumina-supported nickel catalysts in the feed stream containing methane and traces of H2S is reported. Stability tests for 20 h at 350 and 600 degrees C with a packed-bed reactor showed high resistance of the catalysts to sintering processes. Higher conversion at 350 degrees C was observed for ceria supported nickel catalyst. Thermodynamic analysis indicated that CO2 contained in biogas can be converted to methane without carbon formation under specific reaction conditions. An introduction of CH4 to CO2-H-2 feed stream led to the decrease in CO2 conversion and CH4 selectivity. An introduction of the trace amounts of H2S into the feed stream led to the fast drop of CO2 conversion and CH4 selectivity; higher durability (20 %) was observed for Al2O3 than CeO2 supported catalysts. An improved performance of catalysts coated onto high-pressure microchannel microreactors for the direct CO2 methanation reaction applying model biogas mixture was demonstrated.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available