Isomerization of ethylbenzene and m-xylene on zeolites

Journal Article · Wed Jun 01 00:00:00 EDT 1988 · Ind. Eng. Chem. Res.; (United States)

DOI:https://doi.org/10.1021/ie00078a008· OSTI ID:6046597

Hsu, Y S; Lee, T Y; Hu, H C

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.

• Research Organization: Dept. of Chemical Engineering, National Tsing Hua Univ., Hsinchu (TW)
• OSTI ID: 6046597
• Journal Information: Ind. Eng. Chem. Res.; (United States), Vol. 27:6
• Country of Publication: United States
• Language: English

Related Subjects

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