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Sulphur reduction in fluid catalytic cracking using a kaolin in situ crystallization catalyst modified with vanadium

Published online by Cambridge University Press:  09 July 2018

Ya-Li Dai ,
Shu-Qin Zheng  and
Dong Qian
Ya-Li Dai
Affiliation:
College of Chemistry and Chemical Engineering, Central South University, Changsha 410083, Hunan, China Department of Chemistry and Chemical Engineering, Hunan Institute of Science and Technology, Yueyang 414000, Hunan, China
Shu-Qin Zheng
Affiliation:
Department of Chemistry and Chemical Engineering, Hunan Institute of Science and Technology, Yueyang 414000, Hunan, China
Dong Qian*
Affiliation:
College of Chemistry and Chemical Engineering, Central South University, Changsha 410083, Hunan, China State Key Laboratory of Powder Metallurgy, Changsha 410083, PR China
*
*E-mail: qiandong6@vip.sina.com
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Abstract

Sulphur reduction catalysts represent a viable option for S reduction in the fluid catalytic cracking (FCC) process. In this paper, a kaolin in situ crystallization catalyst was modified with vanadium and evaluated in a fixed fluid bed (FFB) reactor. The relation between the acidity of the catalyst, the S reduction rate and the catalyst activity is discussed. The results show that increasing weak Lewis acid acidity favours S reduction in the FCC process. Increasing the V content enhances the weak Lewis acidity, so causing the S reduction rate to increase. The kaolin in situ crystallization catalyst modified with 0.6 wt.% of V leads to a 34.5% reduction in the S content of the liquid product. Comprehensive evaluation of the FFB results and the S reduction ability indicates that the catalyst modified with 0.45 wt.% V provided the best performance.

Keywords

kaolinin situ crystallization catalystvanadium modificationaciditysulphur reductionfluid catalytic cracking (FCC)
Type
Research Article
Information
Clay Minerals , Volume 44 , Issue 3 , September 2009 , pp. 281 - 288
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 2009

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