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Acid and aluminium modification of sepiolite and its application in FCC catalysis

Published online by Cambridge University Press:  09 July 2018

Shu-Qin Zheng ,
Yong Han ,
Xiao-Hong Huang ,
Ya-Li Dai ,
Dong Qian ,
Jian-Ce Zhang  and
Shao Ren
Shu-Qin Zheng*
Affiliation:
Department of Chemistry and Chemical Engineering, Hunan Institute of Science and Technology, Yueyang 414000, Hunan, PR China
Yong Han
Affiliation:
Department of Chemistry and Chemical Engineering, Hunan Institute of Science and Technology, Yueyang 414000, Hunan, PR China College of Chemistry and Chemical Engineering, Central South University, Changsha 410083, Hunan, PR China
Xiao-Hong Huang
Affiliation:
Department of Chemistry and Chemical Engineering, Hunan Institute of Science and Technology, Yueyang 414000, Hunan, PR China College of Chemistry and Chemical Engineering, Central South University, Changsha 410083, Hunan, PR China
Ya-Li Dai
Affiliation:
Department of Chemistry and Chemical Engineering, Hunan Institute of Science and Technology, Yueyang 414000, Hunan, PR China College of Chemistry and Chemical Engineering, Central South University, Changsha 410083, Hunan, PR China
Dong Qian
Affiliation:
College of Chemistry and Chemical Engineering, Central South University, Changsha 410083, Hunan, PR China State Key Laboratory of Powder Metallurgy, Changsha 410083, PR China
Jian-Ce Zhang
Affiliation:
Department of Chemistry and Chemical Engineering, Hunan Institute of Science and Technology, Yueyang 414000, Hunan, PR China
Shao Ren
Affiliation:
Department of Chemistry and Chemical Engineering, Hunan Institute of Science and Technology, Yueyang 414000, Hunan, PR China
*
*E-mail: zhengshuqin37@yahoo.com.cn
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Abstract

The effects of acid and Al concentration, type of Al salt, treatment temperature and time of removal of Mg from sepiolite have been investigated, as has the use of modified sepiolite as an active fluid catalytic cracking (FCC) matrix. The samples were characterized by N2 adsorption and X-ray diffraction. Mg removal from sepiolite increased with increasing acid and Al ion concentration, treatment time and temperature. The temperature had the greatest impact on Mg removal. After acid and Al modification, 29% of the Mg was removed. When using the modified sepiolites as active matrices in FCC catalysts, the specific surface area, pore volume and mesoporous pore volume of the catalysts increased and they exhibited excellent performance in resisting the effects of heavy-metals as a result of the introduction of Mg oxide from the modified sepiolite.

Keywords

sepioliteacid modificationaluminium modificationFCC catalystmatrix
Type
Research Article
Information
Clay Minerals , Volume 45 , Issue 1 , March 2010 , pp. 15 - 22
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 2010

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