Kinetic Modeling of Dehydrogenation of Isobutane on Chromia/Alumina Catalyst

Autor:	Sanna M.K. Airaksinen, M. Elina Harlin, A. Outi I. Krause
Rok vydání:	2002
Předmět:	Reaction mechanism General Chemical Engineering Inorganic chemistry General Chemistry Activation energy Industrial and Manufacturing Engineering Chromia Catalysis Reaction rate chemistry.chemical_compound Adsorption chemistry Isobutane Organic chemistry Dehydrogenation
Zdroj:	Industrial & Engineering Chemistry Research. 41:5619-5626
ISSN:	1520-5045 0888-5885
DOI:	10.1021/ie020371j
Popis:	The kinetics of isobutane dehydrogenation was studied on a chromia/alumina catalyst developed for fluidized-bed operation. The dehydrogenation activity measurements were carried out in a laboratory-scale plug-flow reactor at 520−580 °C under atmospheric pressure. Several kinetic models were derived from different mechanisms, and the suitability of the models in describing the rate of the dehydrogenation reaction was tested. The results of the kinetic modeling suggested that the rate-determining step is isobutane adsorption, possibly on a pair of chromium and oxygen ions. A satisfactory description of the reaction rate depended on inclusion of the isobutene and hydrogen adsorption parameters in the mathematical model. The activation energy of the dehydrogenation reaction was estimated to be 133−142 kJ/mol.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::3398218815f74eff6c059124dd9d1684 https://doi.org/10.1021/ie020371j Zobrazit plný text záznamu