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Chemical kinetic modeling of i‐butane and n‐butane catalytic cracking reactions over HZSM‐5 zeolite
Author(s) -
Roohollahi Gholamreza,
Kazemeini Mohammad,
Mohammadrezaee Alireza,
Golhosseini Reza
Publication year - 2012
Publication title -
aiche journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.958
H-Index - 167
eISSN - 1547-5905
pISSN - 0001-1541
DOI - 10.1002/aic.12750
Subject(s) - butane , zeolite , cracking , catalysis , fluid catalytic cracking , kinetic energy , chemistry , isobutane , chemical engineering , organic chemistry , materials science , engineering , physics , quantum mechanics
Abstract A chemical kinetic model for i ‐butane and n ‐butane catalytic cracking over synthesized HZSM‐5 zeolite, with SiO 2 /Al 2 O 3 = 484, and in a plug flow reactor under various operating conditions, has been developed. To estimate the kinetic parameters of catalytic cracking reactions of i ‐butane and n ‐butane, a lump kinetic model consisting of six reaction steps and five lumped components is proposed. This kinetic model is based on mechanistic aspects of catalytic cracking of paraffins into olefins. Furthermore, our model takes into account the effects of both protolytic and bimolecular mechanisms. The Levenberg–Marquardt algorithm was used to estimate kinetic parameters. Results from statistical F‐tests indicate that the kinetic models and the proposed model predictions are in satisfactory agreement with the experimental data obtained for both paraffin reactants. © 2011 American Institute of Chemical Engineers AIChE J, 58: 2456–2465, 2012