硅胶催化双氧水甲酸氧化噻吩类化合物的研究

CIESC Journal

• RESEARCH NOTES • 上一篇

硅胶催化双氧水甲酸氧化噻吩类化合物的研究

陈兰菊^a,b; 郭绍辉^a; 赵地顺^b

^a State Key Lab of Heavy Oil Processing, China University of Petroleum, Beijing 102249, China
^b Department of Chemistry, Hebei University of Science and Technology, Shijiazhuang 050018, China

收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2006-12-28 发布日期:2006-12-28
通讯作者: 陈兰菊

Oxidation of thiophenes over silica gel in hydrogen peroxide/formic acid system

CHEN Lanju^a,b; GUO Shaohui^a; ZHAO Dishun^b

^a State Key Lab of Heavy Oil Processing, China University of Petroleum, Beijing 102249, China
^b Department of Chemistry, Hebei University of Science and Technology, Shijiazhuang 050018, China

Received:1900-01-01 Revised:1900-01-01 Online:2006-12-28 Published:2006-12-28
Contact: CHEN Lanju

摘要/Abstract

摘要： Thiophene (C4H4S) and 3-methylthiophene(3-MC4H4S) are typical thiophenenic sulfur compounds that exist in fluid catalytic cracking (FCC) gasoline. Oxidation of C4H4S and 3-MC4H4S were conducted in hydrogen peroxide (H2O2) and formic acid system over a series of silica gel loaded with metal oxide. The silica gel loaded with copper and cobalt (1:1) oxide was found very active for the model compound oxidation using H2O2/formic acid, while the silica gel unloaded with metal oxide was less active. The sulfur removal rate of thiophenes was different as solvent was changed. And the conversation of C4H4S and 3-MC4H4S was improved at higher temperature, but reduced when olefin was added. The sulfur removal rate of model sulfur compounds was enhanced when the phase transfer catalyst emulsifier polyethylene glycol octyl phenyl ether or tetrabutylammonium bromide(TBAB) was added. The sulfur removal rate of simulated gasoline containing 524μg•ml－1 sulfur reached 90%. Interestingly, in a H2O2 and formic acid system with the addition of TBAB, a bromine substitution trend appeared in the oxidation of thiophenes, suggesting the influence of TBAB.

关键词: oxidative desulfurization;silica gel;thiophene;3-methylthiophene

Abstract: Thiophene (C4H4S) and 3-methylthiophene(3-MC4H4S) are typical thiophenenic sulfur compounds that exist in fluid catalytic cracking (FCC) gasoline. Oxidation of C4H4S and 3-MC4H4S were conducted in hydrogen peroxide (H2O2) and formic acid system over a series of silica gel loaded with metal oxide. The silica gel loaded with copper and cobalt (1:1) oxide was found very active for the model compound oxidation using H2O2/formic acid, while the silica gel unloaded with metal oxide was less active. The sulfur removal rate of thiophenes was different as solvent was changed. And the conversation of C4H4S and 3-MC4H4S was improved at higher temperature, but reduced when olefin was added. The sulfur removal rate of model sulfur compounds was enhanced when the phase transfer catalyst emulsifier polyethylene glycol octyl phenyl ether or tetrabutylammonium bromide(TBAB) was added. The sulfur removal rate of simulated gasoline containing 524μg•ml－1 sulfur reached 90%. Interestingly, in a H2O2 and formic acid system with the addition of TBAB, a bromine substitution trend appeared in the oxidation of thiophenes, suggesting the influence of TBAB.

Key words: oxidative desulfurization, silica gel, thiophene, 3-methylthiophene

陈兰菊, 郭绍辉, 赵地顺. 硅胶催化双氧水甲酸氧化噻吩类化合物的研究[J]. CIESC Journal.

CHEN ,Lanju, ,GUO ,Shaohui, ZHAO ,Dishun. Oxidation of thiophenes over silica gel in hydrogen peroxide/formic acid system[J]. .

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硅胶催化双氧水甲酸氧化噻吩类化合物的研究

Oxidation of thiophenes over silica gel in hydrogen peroxide/formic acid system

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