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Indexed by:期刊论文

Date of Publication:2012-08-05

Journal:CATALYSIS COMMUNICATIONS

Included Journals:SCIE、EI、Scopus

Volume:25

Page Number:18-21

ISSN No.:1566-7367

Key Words:Coking benzene; Nano-sized ZSM-5 zeolites; Catalyst stability; Y2O3

Abstract:The ethylation of coking benzene with ethanol over nano-sized ZSM-5 zeolites modified with Y2O3, La2O3 and CeO2 was investigated in a fixed-bed reactor. Nano-sized ZSM-5 zeolite modified with Y2O3 was more stable than the other two samples during the reaction. The results from NH3-TPD. Py-IR, and TG-DTA show that the strong Bronsted acid sites were eliminated, consequently suppressing coke deposits during the reaction. Combined with the results from H-1 NMR and Xe-129 NMR spectra, it is concluded that the hydrated Yttrium ions with small size reached deep location in zeolite channel. (C) 2012 Elsevier B.V. All rights reserved.