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论文类型：期刊论文

发表时间：2007-03-01

发表刊物：CATALYSIS COMMUNICATIONS

收录刊物：SCIE、EI

卷号：8

期号：3

页面范围：324-328

ISSN号：1566-7367

关键字：acid site; acid strength; activity; toluene disproportionation; NH3-TPD

摘要：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.