A Mechanistic Model on Catalyst Deactivation by Coke Formation in a CSTR Reactor

Journal article


Zhao, D., Muhammad, I, Makwashi, N., Ahmed, T and Manos, G. (2023). A Mechanistic Model on Catalyst Deactivation by Coke Formation in a CSTR Reactor. Processes. 11 (3), pp. 944-962. https://doi.org/10.3390/pr11030944
AuthorsZhao, D., Muhammad, I, Makwashi, N., Ahmed, T and Manos, G.
Abstract

A mechanistic model on catalyst deactivation by coke formation in a continuous stirred tank reactor (CSTR) has been developed in the paper. Catalyst deactivation by coke formation was treated as a surface reaction. Four reaction mechanisms representing coke formation through different routes were proposed. The evolved system of ordinary differential equations (ODEs) was solved numerically using MATLAB. This approach was validated by applying it to the skeletal isomerization of 1-pentene over ferrierite. Simulation results were compared qualitatively to those
obtained from the literature. Simulation results indicated that coke formation is an extremely rapid process with fast formation of coke components on the strongest acid sites leading to final coke. The coke deposition is slower at higher residence times resulting in more stable product formation and weaker deactivation. The results obtained from this work revealed that the developed model is indeed able to successfully demonstrate the most essential features of catalyst deactivation by coke formation and are in agreement with the findings in the literature. Future work is aimed to extend the study to different reactors such as a plug flow reactor, in addition to analysis of the reaction system’s
sensitivity to variables such as temperature and pressure.

Keywordsmechanistic modelling; catalyst deactivation; coke formation; CSTR; catalytic cracking
Year2023
JournalProcesses
Journal citation11 (3), pp. 944-962
PublisherMDPI
ISSN2227-9717
Digital Object Identifier (DOI)https://doi.org/10.3390/pr11030944
Web address (URL)https://www.mdpi.com/journal/processes
Publication dates
Print20 Mar 2023
Publication process dates
Accepted13 Mar 2023
Deposited29 Mar 2023
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