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Title: Isomerization of ethylbenzene and m-xylene on zeolites

Abstract

Simultaneous isomerizstion of ethylbenzene and m-xylene on zeolite catalysts, including Pt/mordenite, Pt/USY, Pt/ZSM-5, and Pd/ZSM-5, was studied. Experimental results indicated that Pt/ZSM-5 was the superior catalyst for these reactions. Pd/ZSM-5 is better than Pt/USY, although, both are good enough for the reactions, in comparison with Pt/mordenite. A kinetic model with plausible reaction paths was proposed for the isomerization. The estimated reaction rate constants and activation energies indicated that the transformation of m-xylene to o- or p-xylene might be limited by the mass-transfer rate of the diphenylmethane-type intermediate, and the formation of o-xylene from ethylbenzene could be restricted by the smaller protonated cyclopropane intermediate.

Authors:
; ;
Publication Date:
Research Org.:
Dept. of Chemical Engineering, National Tsing Hua Univ., Hsinchu (TW)
OSTI Identifier:
6046597
Resource Type:
Journal Article
Journal Name:
Ind. Eng. Chem. Res.; (United States)
Additional Journal Information:
Journal Volume: 27:6
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; BENZENE; ISOMERIZATION; XYLENES; ZEOLITES; CATALYTIC EFFECTS; ACTIVATION ENERGY; CATALYSTS; CHEMICAL REACTIONS; ETHYL RADICALS; EXPERIMENTAL DATA; MASS TRANSFER; MORDENITE; PROPANE; PROTONS; ALKANES; ALKYL RADICALS; ALKYLATED AROMATICS; AROMATICS; BARYONS; DATA; ELEMENTARY PARTICLES; ENERGY; FERMIONS; HADRONS; HYDROCARBONS; INFORMATION; INORGANIC ION EXCHANGERS; ION EXCHANGE MATERIALS; MATERIALS; MINERALS; NUCLEONS; NUMERICAL DATA; ORGANIC COMPOUNDS; RADICALS; SILICATE MINERALS; 400201* - Chemical & Physicochemical Properties; 400101 - Activation, Nuclear Reaction, Radiometric & Radiochemical Procedures

Citation Formats

Hsu, Y S, Lee, T Y, and Hu, H C. Isomerization of ethylbenzene and m-xylene on zeolites. United States: N. p., 1988. Web. doi:10.1021/ie00078a008.
Hsu, Y S, Lee, T Y, & Hu, H C. Isomerization of ethylbenzene and m-xylene on zeolites. United States. https://doi.org/10.1021/ie00078a008
Hsu, Y S, Lee, T Y, and Hu, H C. 1988. "Isomerization of ethylbenzene and m-xylene on zeolites". United States. https://doi.org/10.1021/ie00078a008.
@article{osti_6046597,
title = {Isomerization of ethylbenzene and m-xylene on zeolites},
author = {Hsu, Y S and Lee, T Y and Hu, H C},
abstractNote = {Simultaneous isomerizstion of ethylbenzene and m-xylene on zeolite catalysts, including Pt/mordenite, Pt/USY, Pt/ZSM-5, and Pd/ZSM-5, was studied. Experimental results indicated that Pt/ZSM-5 was the superior catalyst for these reactions. Pd/ZSM-5 is better than Pt/USY, although, both are good enough for the reactions, in comparison with Pt/mordenite. A kinetic model with plausible reaction paths was proposed for the isomerization. The estimated reaction rate constants and activation energies indicated that the transformation of m-xylene to o- or p-xylene might be limited by the mass-transfer rate of the diphenylmethane-type intermediate, and the formation of o-xylene from ethylbenzene could be restricted by the smaller protonated cyclopropane intermediate.},
doi = {10.1021/ie00078a008},
url = {https://www.osti.gov/biblio/6046597}, journal = {Ind. Eng. Chem. Res.; (United States)},
number = ,
volume = 27:6,
place = {United States},
year = {Wed Jun 01 00:00:00 EDT 1988},
month = {Wed Jun 01 00:00:00 EDT 1988}
}