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Simultaneous estimation of kinetics and catalysts activity during cracking of 1,3,5-tri-isopropyl benzene on FCC catalyst

Paper ID Volume ID Publish Year Pages File Format Full-Text
54401 47008 2014 8 PDF Available
Title
Simultaneous estimation of kinetics and catalysts activity during cracking of 1,3,5-tri-isopropyl benzene on FCC catalyst
Abstract

•Catalyst activity has been measured independently during cracking of a hydrocarbon.•A methodology to estimate kinetic rates were without any additional equation for coke deposition was developed.•Available micropores, place of active sites, are function of coke content only.•A laboratory CREC-Riser Simulator, very precise, was used for the experiments.

Catalytic cracking reactions, performed on commercial catalysts, are difficult to follow because of the simultaneous deactivation of the catalyst as consequence of coke deposition on catalyst surfaces during cracking of hydrocarbon molecules. In this work, a model for catalyst deactivation in terms of fouling because of blockage of micropores of the catalyst is used to estimate activity independently of reaction rates; later cracking kinetic rates of a model compound are estimated. It was found that the expected low energy of coke deposition reactions dominate the process, however these reactions are not easy to estimate a priori because of the definition of coke as a lumped entity. A comprehensive model of a CREC-Riser simulator Reactor is developed in order to consider mass balances for each specific operating condition. Three temperatures and two contact times are used to evaluate frequency factors and activation energies of the reactions that take place during the catalytic cracking of 1,3,5-tri-isopropyl benzene in two cases, with catalyst coming from an industrial unit and with catalyst pre-coked in laboratory. A methodology to separate activity and apparent kinetics in this kind of reactions is proposed.

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Keywords
Catalytic cracking; Catalyst activity; Coke deposition; CREC-Riser Simulator; Effectiveness factor; Micropores.
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Simultaneous estimation of kinetics and catalysts activity during cracking of 1,3,5-tri-isopropyl benzene on FCC catalyst
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Publisher
Database: Elsevier - ScienceDirect
Journal: Catalysis Today - Volumes 220–222, March 2014, Pages 178–185
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us