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Catalytic transformation of C7–C9 methyl benzenes over USY-based FCC zeolite catalyst

Paper ID Volume ID Publish Year Pages File Format Full-Text
43859 45992 2006 11 PDF Available
Title
Catalytic transformation of C7–C9 methyl benzenes over USY-based FCC zeolite catalyst
Abstract

Catalytic transformation of three methyl benzenes (toluene, m-xylene, and 1,2,4-trimethylbenzene) has been investigated over USY-based FCC zeolite catalyst in a novel Riser Simulator at different operating conditions. The effect of reaction conditions on the variation of isomerization to disproportionation products ratio (I/D), distribution of trimethylbenzene (TMB) isomers (1,3,5-to-1,2,3-) and values of p-xylene/o-xylene (P/O) ratios are reported. The sequence of reactivity of the three alkyl benzenes was found to decrease as the number of methyl group per benzene ring decreases, as follows: 1,2,4-trimethylbenzene > m-xylene > toluene. This is true at all temperatures investigated over the USY zeolite. Toluene was found unreactive in our reaction condition. Effectiveness factor (ηss) of both 1,2,4-TMB and m-xylene have been estimated. While m-xylene's ηss was close to unity at all condition, 1,2,4-TMB's ηss was less than that of m-xylene. The effectiveness factor was estimated from the quasi-steady state approximation modeling of the experimental data involving a decay function based on “Time on Stream” (TOS). Based on the present study, it was found that the number of methyl groups has the most important role on the reactivity of 1,2,4-TMB, m-xylene and toluene over Y-based catalyst.

Keywords
FCC zeolite catalyst; USY; Toluene; m-Xylene; Disproportionation; Isomerization
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Catalytic transformation of C7–C9 methyl benzenes over USY-based FCC zeolite catalyst
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volume 305, Issue 1, 17 May 2006, Pages 21–31
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