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Chemcial Industry and Engineering 2013, Vol. 30 Issue (3) :33-37    DOI:
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Catalytic Activity of Modified HZSM-5 on Hydration of Cyclohexene
 LI  Ya-Nan, WANG  Bao-He, ZHU  Jing
R&D Center for Petrochemical Technology, Key Laboratory for Green Chemical Technology of State Education Ministry, Tianjin University

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Abstract A method of modify HZSM-5 by using niobium oxalate ammonium is introduced. We studied the surface acidity of Nb/HZSM-5 with different Nb content and the catalytic activity of cyclohexene hydration reaction. XRD and BET characterization results showed that: niobic acid had been highly dispersed, when Nb2O5 was added to HZSM-5 with suitable amount, the modified Nb/HZSM-5 showed a preservation of the zeolite structure; Py-TPD showed that the introduce of the niobium avoiding the dehydroxylation of zeolite which led acid reduction, and also increased the framework stability of zeolite catalyst. Loading with 6%(wt%)Nb2O5, calcined at 450 ℃ for 4 h got the highest catalytic activity, which the conversion of cyclohexene was 14.7% and the selectivity of cyclohexanol was 99.7%.
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LI Ya-Nan
WANG Bao-He
ZHU Jing
KeywordsNb/HZSM-5 catalyst   niobium oxalates ammonium   cyclohexene hydration   cyclohexanol     
Received 2012-05-30;
Corresponding Authors: 汪宝和,电话:(022)27403763,E-mail:wangbh@tju.edu.cn。     Email: wangbh@tju.edu.cn
About author: 李雅楠(1988-),女,硕士,从事环己烯水合催化剂的研究。
Cite this article:   
LI Ya-Nan, WANG Bao-He, ZHU Jing.Catalytic Activity of Modified HZSM-5 on Hydration of Cyclohexene[J]  Chemcial Industry and Engineering, 2013,V30(3): 33-37
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