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Modeling of surface intermediates under forced periodic conditions applied to CO 2 methanation
Author(s) -
Marwood Michel,
Doepper Ralf,
Renken Albert
Publication year - 1996
Publication title -
the canadian journal of chemical engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.404
H-Index - 67
eISSN - 1939-019X
pISSN - 0008-4034
DOI - 10.1002/cjce.5450740516
Subject(s) - methanation , formate , carbon dioxide , adsorption , methane , hydrogen , carbon monoxide , absorption (acoustics) , carbonate , chemistry , phase (matter) , carbon fibers , materials science , inorganic chemistry , chemical physics , catalysis , organic chemistry , composite material , composite number
Forced oscillations of the carbon dioxide concentration in a hydrogen feed were applied to the carbon dioxide methanation reaction with simultaneous gas phase and surface analysis. The response of the gas phase and surface species to these repeated dynamic conditions show a time shift following the sequence CO 2 → formate → CO → methane, but can be modeled by a simple model involving one single adsorbed surface intermediate and a reservoir in equilibrium with this intermediate. The dynamic behavior of this intermediate is very close to the variation of the IR absorption band associated with formate and carbonate species.