Chem. J. Chinese Universities ›› 2017, Vol. 38 ›› Issue (1): 72.doi: 10.7503/cjcu20160533

• Physical Chemistry • Previous Articles     Next Articles

Alkylation Desulfurization of FCC Gasoline over Brönsted-Lewis Organic-inorganic Heteropoly Acid Catalyst

YU Fengli1, WANG Qingyu1, LI Guixiao1, YUAN Bing1, XIE Congxia1,*(), YU Shitao2   

  1. 1. State Key Laboratory Base of Eco-chemical Engineering
    2. College of Chemical Engineering, Qingdao University of Science and Technology, Qingdao 266042, China
  • Received:2016-07-25 Online:2017-01-10 Published:2016-12-12
  • Contact: XIE Congxia E-mail:xiecongxia@126.com
  • Supported by:
    † Supported by the National Natural Science Foundation of China(No. 21476120), the Emphasis Development Plan of Shandong Province, China(No. 2015GGX107008) and the Taishan Scholars Projects of Shandong Province, China(No. ts201511033).

Abstract:

A series of Brönsted-Lewis organic-inorganic heteropoly acids was synthesized and used for catalyzing alkylation desulfurization of model fluid catalytic cracking(FCC) gasoline. Among these prepared Brönsted-Lewis organic-inorganic heteropoly acids, Sm0.33[MIM-PS]HPW12O40 has the highest acid strength and exhibits the best catalytic activity for the alkylation of three thiophenic sulfides including thiophene(T), 2-methyl thiophene(2-MT) and 3-methyl thiophene(3-MT) in model FCC gasolines. The effects of the dosage of the catalyst, reaction temperature and reaction time on the conversions of three thiophenic sulfides catalyzed by Sm0.33[MIM-PS]HPW12O40 were investigated. The selected optimal conditions as follows: the mass ratio of the catalyst to model FCC gasoline 1:50, reaction temperature 125 ℃ and reaction time 1 h. Under the optimal conditions, T, 2-MT and 3-MT all can be nearly completely transformed. The recyclability of the catalyst Sm0.33[ MIM-PS]HPW12O40 was investigated. The results show the catalyst exhibits very excellent recyclability. Under the above selected reaction conditions, the catalytic activity of Sm0.33[MIM-PS]HPW12O40 for the alkylation of three thiophenic sulfides nearly remains unchanged during 12 recycles.

Key words: Alkylation desulfurization, FCC gasoline, Thiophenic sulfide, Brönsted-Lewis heteropoly acid

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