Adsorption behavior and mechanism of VO-OEP on modified kaolinite

LIU Zhang-Yong; Zhang-Yu-Zhen; CHA Qiang-Fang; ZHANG Xiao-Yang; LIU Dong

Volume 38 Issue 01

Feb. 2010

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LIU Zhang-Yong, Zhang-Yu-Zhen, CHA Qiang-Fang, ZHANG Xiao-Yang, LIU Dong. Adsorption behavior and mechanism of VO-OEP on modified kaolinite[J]. Journal of Fuel Chemistry and Technology, 2010, 38(01): 63-68.

Citation:

LIU Zhang-Yong, Zhang-Yu-Zhen, CHA Qiang-Fang, ZHANG Xiao-Yang, LIU Dong. Adsorption behavior and mechanism of VO-OEP on modified kaolinite[J]. Journal of Fuel Chemistry and Technology, 2010, 38(01): 63-68.

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Adsorption behavior and mechanism of VO-OEP on modified kaolinite

State Key Laboratory of Heavy Oil Processing, Heavy Oil Research Institute, China University of Petroleum(East China), Dongying 257061, China

Received Date: 2009-04-19
Rev Recd Date: 2009-07-26
Publish Date: 2010-02-28

Abstract

Abstract

The acid modified kaolinite and Mo supported on acid modified kaolinite were used as the adsorbents for VO-OEP in cyclohexane. The adsorption behavior as well as adsorption mechanism were investigated thermodynamically. The results show that the adsorption process follows the Langmuir′s isotherms, indicating a monolayer VO-OEP adsorbed on the modified kaolinite. The adsorption of VO-OEP on the modified kaolinite is exothermic in nature with the adsorption heat exceeding 40kJ/mol, which illustrates that chemical bonds are formed between VO-OEP and the modified kaolinite by adsorption.
- VO-OEP,
- modified kaolinite,
- adsorption,
- thermodynamics