过氧化氢-甲酸氧化模拟柴油脱硫试验及其动力学分析  

Oxidative desulfurization of a model diesel fuel using an H_2O_2-formic acid system and its kinetic analysis

作　　者：马雪琦[1] 冯流[1] 钟起隆[1] 

机构地区：[1]北京化工大学化学工程学院,北京100029

出　　处：《北京化工大学学报（自然科学版）》2010年第3期9-13,共5页Journal of Beijing University of Chemical Technology(Natural Science Edition)

基　　金：国家自然科学基金(20777007);北京市教委重点学科建设项目(环境工程)

摘　　要：以正辛烷-二苯并噻吩模拟柴油,进行过氧化氢-甲酸氧化脱硫试验和动力学研究。结果表明,过氧化氢-甲酸体系能够有效氧化模拟柴油中的二苯并噻吩,生成二苯并噻吩砜。影响脱硫率的因素顺序为:甲酸用量>温度>过氧化氢用量。优化条件为:V(模拟柴油)∶V(H2O2)∶V(HCOOH)=100∶1∶10,40℃下反应1 h,硫的质量分数可由1.14×10-3降至1.14×10-5,脱硫率为99.01%。该条件下计算动力学参数得反应级数1.055 4,速率常数5.15×10-2(μg/g)1-n.min-1。The oxidative desulfurization of a model diesel fuel（which was prepared by mixing n-octane and dibenzothiophene（DBT）） has been carried out using H2O2-HCOOH.Formic acid showed better catalytic ability than other acids,with DBT in the model diesel fuel being converted into a polar substance that was shown to be dibenzothiophene sulfone.The sensitivity of desulfurization efficiency to the experimental parameters decreased in the order HCOOH content〉temperature〉H2O2 content,according to orthogonal tests.Furthermore,when reacting for 1 h at 40 ℃ and atmospheric pressure,with the addition of 1% volume fraction of H2O2 and 10% HCOOH,the mass fraction of sulfur was reduced from 1.14×10^-3 to 1.14×10^-5 without any the need for any extraction,and the desulfurization efficiency reached 99.01%.A kinetic study under these conditions showed that the reaction order was 1.0554,and the rate constant was 5.15×10^-2（μg/g）^1-n·min^-1.

关 键 词：过氧化氢 甲酸 脱硫 模拟柴油 动力学 

分 类 号：TE624.5[石油与天然气工程—油气加工工程]