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Effect of Metal‐Support Interactions in Mixed Co/Al Catalysts for Dry Reforming of Methane
Author(s) -
Horlyck Jonathan,
Sara Marina,
Lovell Emma C.,
Amal Rose,
Scott Jason
Publication year - 2019
Publication title -
chemcatchem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.497
H-Index - 106
eISSN - 1867-3899
pISSN - 1867-3880
DOI - 10.1002/cctc.201900638
Subject(s) - carbon dioxide reforming , catalysis , methane , oxide , metal , chemical engineering , selectivity , syngas , catalyst support , chemistry , methane reformer , inorganic chemistry , materials science , steam reforming , organic chemistry , hydrogen production , engineering
Composite Co/Al oxide materials were prepared via flame spray pyrolysis and examined as catalysts for the dry reforming of methane. The interaction between the metal (Co) and the support (Al‐oxide) was regulated by varying the Co : Al ratio and its influence on catalyst performance studied. The synthesis of materials with a Co content of 30 mol % (Co 3 Al 7 ) promoted the formation of readily reduced and highly‐dispersed Co particles. This, in combination with a high relative surface basicity, contributed to Co 3 Al 7 delivering a high and stable activity towards the dry reforming reaction. The formation of bulk Co 3 O 4 particles, which exhibit weak interactions with the support material, in samples with a Co content of 50 (Co 5 Al 5 ) and 70 mol % (Co 7 Al 3 ) caused rapid catalyst deactivation via coking. The findings demonstrate the importance of metal‐support interactions between the Co catalyst and Al‐oxide support for the activity and selectivity in the dry reforming of methane. Highly dispersed Co deposits and high support basicity, induced by an ideal FSP Co : Al synthesis ratio, are key to delivering an active and stable catalyst for the dry reforming of methane.