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Catalytic Transformation Of C-7-C9 Methyl Benzenes Over USY-Based FCC Zeolite Catalyst

Al-Khattaf, S and Tukur, N.M. and Al-Amer, Samir and Al-Mubaiyedh, U.A. Catalytic Transformation Of C-7-C9 Methyl Benzenes Over USY-Based FCC Zeolite Catalyst. APPLIED CATALYSIS A-GENERAL, 305. pp. 21-31.

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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 pxylene/ 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 (eta(ss)) of both 1,2,4-TMB and m-xylene have been estimated. While m-xylene's eta(ss) was close to unity at all condition, 1,2,4-TMB's eta(ss) 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.



Item Type:Article
Subjects:Computer
Divisions:College Of Computer Sciences and Engineering > Systems Engineering Dept
Creators:Al-Khattaf, S and Tukur, N.M. and Al-Amer, Samir and Al-Mubaiyedh, U.A.
Email:UNSPECIFIED, UNSPECIFIED, samirha@kfupm.edu.sa, UNSPECIFIED
ID Code:2569
Deposited By:SHAIKH ARIFUSALAM
Deposited On:14 Jun 2008 13:31
Last Modified:12 Apr 2011 13:12

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