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Reactors, Kinetics, and Catalysis
Olefin production by cofeeding methanol and n-butane: Kinetic modeling considering the deactivation of HZSM-5 zeolite
Article first published online: 29 NOV 2010
DOI: 10.1002/aic.12471
Copyright © 2010 American Institute of Chemical Engineers (AIChE)
Additional Information
How to Cite
Mier, D., Gayubo, A. G., Aguayo, A. T., Olazar, M. and Bilbao, J. (2011), Olefin production by cofeeding methanol and n-butane: Kinetic modeling considering the deactivation of HZSM-5 zeolite. AIChE J., 57: 2841–2853. doi: 10.1002/aic.12471
Publication History
- Issue published online: 9 SEP 2011
- Article first published online: 29 NOV 2010
- Accepted manuscript online: 19 OCT 2010 09:40AM EST
- Manuscript Revised: 1 OCT 2010
- Manuscript Received: 23 JUN 2010
Funded by
- Department of Education, Universities, and Research of the Basque Government. Grant Number: GIC07/24-IT-220-07
- Ministry of Science and Innovation of the Spanish Government. Grant Number: Project CTQ2007-66571/PPQ
- Abstract
- Article
- References
- Cited By
Keywords:
- kinetic model;
- HZSM-5 zeolite;
- methanol;
- n-butane cracking;
- MTO process;
- catalyst deactivation
Abstract
The joint transformation of methanol and n-butane fed into a fixed-bed reactor on a HZSM-5 zeolite catalyst has been studied under energy neutral conditions (methanol/n-butane molar ratio of 3/1). The kinetic scheme of lumps proposed integrates the reaction steps corresponding to the individual reactions (cracking of n-butane and MTO process at high-temperature) and takes into account the synergies between the steps of both reactions. The deactivation by coke deposition has been quantified by an expression dependent on the concentration of the components in the reaction medium, which is evidence that oxygenates are the main coke precursors. The concentration of the components in the reaction medium (methanol, dimethyl ether, n-butane, C2![[BOND]](http://onlinelibrarystatic.wiley.com/undisplayable_characters/00f8ff.gif)
C4 paraffins, C2C4 olefins, C5C10 lump, and methane) is satisfactorily calculated in a wide range of conditions (between 400 and 550°C, up to 9.5 (g of catalyst) h (mol CH2)−1 and with a time on stream of 5 h) by combining the equation of deactivation with the kinetic model of the main integrated process. © 2010 American Institute of Chemical Engineers AIChE J, 2011