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Chemistry in Industry : Journal of Chemists and Chemical Engineers of Croatia, Vol. 58 No. 11, 2009.

Original scientific paper

Possibility of Using Sepiolite as the Matrix of FCC Catalysts

Shu-qin Zheng ; Hunan Institute of Science and Technology, Yueyang, Hunan, China
Yong Han ; Hunan Institute of Science and Technology, Yueyang, Hunan, China; College of Chemistry and Chemical Engineering, Central South University, Changsha, Hunan, China
Xiao-hong Huang ; Hunan Institute of Science and Technology, Yueyang, Hunan, China; College of Chemistry and Chemical Engineering, Central South University, Changsha, Hunan, China
Dong Qian ; College of Chemistry and Chemical Engineering, Central South University, Changsha, Hunan, China
Ke-wen Tang ; Hunan Institute of Science and Technology, Yueyang, Hunan, China
Jian-hui Yan ; Hunan Institute of Science and Technology, Yueyang, Hunan, China
Shao Ren ; Hunan Institute of Science and Technology, Yueyang, Hunan, China

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Abstract

The effect of acid concentration, time and temperature of modification on the magnesium removal from sepiolite modified by hydrochloric acid, sulfuric acid and nitric acid and on its effectiveness as an active matrix for FCC catalysts, were investigated. The modified sepiolite was characterized by XRD, SEM and N2 adsorption. The results show that the removal of magnesium, specific surface area, and pore specific volume of modified sepiolite are improved with increasing acid concentration, treating time and treating temperature. Hydrochloric acid appears preferable to the modification of sepiolite. The suitable acid modification conditions of sepiolite for FCC catalysts are 80 for 2.5 h with 1 mol L-1 HCl acid, under which the removal of magnesium in sepiolite is 27 %. With the modified sepiolite as an active matrix for FCC catalysts, the specific surface area, pore specific volume and mesopore pore specific volume of the catalysts can increase effectively, the catalysts exhibit excellent heavy-metal resisting performance and better cracking properties as a result of the introduction of magnesium oxide from the modified sepiolite.

Keywords

sepiolite; acid modification; FCC catalyst; matrix

Hrčak ID:

42974

URI

https://hrcak.srce.hr/42974

Publication date:

10.11.2009.

Article data in other languages: croatian

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