Release Time:2019-03-10  Hits:

Indexed by: Journal Article

Date of Publication: 2007-03-01

Journal: CATALYSIS COMMUNICATIONS

Included Journals: EI、SCIE

Volume: 8

Issue: 3

Page Number: 324-328

ISSN: 1566-7367

Key Words: acid site; acid strength; activity; toluene disproportionation; NH3-TPD

Abstract: The acid amount and acid strength of nanoscale HZSM-5 and modified HZSM-5 were studied. It has been shown that only acid sites with acid strength H-0 <= +2.27 are related to the catalytic activity in toluene disproportionation. The acid sites with acid strength H-0 <= -3.0 are easily passivated and the acid site with acid strength -3.0 < H-0 <= +2.27 are the body of valid acid site in modified HZSM-5. The concentration of acid site did not linearly relate to the reactivity in toluene disproportionation. (c) 2006 Elsevier B.V. All rights reserved.