Isomerization of ethylbenzene and m-xylene on zeolites
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), Journal Name: Ind. Eng. Chem. Res.; (United States) Vol. 27:6; ISSN IECRE
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
400101 -- Activation
Nuclear Reaction
Radiometric & Radiochemical Procedures
400201* -- Chemical & Physicochemical Properties
ACTIVATION ENERGY
ALKANES
ALKYL RADICALS
ALKYLATED AROMATICS
AROMATICS
BARYONS
BENZENE
CATALYSTS
CATALYTIC EFFECTS
CHEMICAL REACTIONS
DATA
ELEMENTARY PARTICLES
ENERGY
ETHYL RADICALS
EXPERIMENTAL DATA
FERMIONS
HADRONS
HYDROCARBONS
INFORMATION
INORGANIC ION EXCHANGERS
ION EXCHANGE MATERIALS
ISOMERIZATION
MASS TRANSFER
MATERIALS
MINERALS
MORDENITE
NUCLEONS
NUMERICAL DATA
ORGANIC COMPOUNDS
PROPANE
PROTONS
RADICALS
SILICATE MINERALS
XYLENES
ZEOLITES