无机路易斯酸脱除模拟焦化粗苯中噻吩的研究  

Removal of Thiophene from Simulated Coking Crude Benzene Using Inorganic Lewis Acids

作　　者：梁田 龙晓 宋浩 沈喜洲[1] LIANG Tian;LONG Xiao;SONG Hao;SHEN Xizhou(School of Chemical Engineering and Pharmacy,Wuhan Institute of Technology,Wuhan 430205,China;SINOPEC Research Institute of Petroleum Processing,Beijing 100083,China)

机构地区：[1]武汉工程大学化工与制药学院,湖北武汉430205 [2]中国石化石油化工科学研究院,北京100083

出　　处：《武汉工程大学学报》2022年第4期377-383,共7页Journal of Wuhan Institute of Technology

基　　金：沈喜洲焦氏粗苯脱吡啶中间放大试验(010338)。

摘　　要：为消除焦化粗苯中噻吩类硫化物对生产纯苯质量所带来的影响,研究开发了脱除苯中噻吩的非加氢技术,考察了无机路易斯酸种类、模拟原料组成、反应时间、摩尔比以及反应温度对噻吩脱除率的影响,并对其表观反应动力学进行研究。结果表明,在六种无机路易斯酸FeCl_(3)、CoCl_(2)、ZnCl_(2)、NiCl_(2)、CuCl_(2)、CuCl中,FeCl_(3)对模拟焦化粗苯中噻吩有较好的脱除效果,且在其它实验条件相同时,FeCl_(3)对不同组成模拟焦化粗苯中噻吩的脱除率由低到高顺序依次为噻吩/苯,噻吩/甲苯,噻吩/苯-甲苯-二甲苯。噻吩脱除率随反应时间(0~70 min)、氯化铁与噻吩摩尔比[(1∶1)~(8∶1)]和反应温度(10~70℃)的增加而增加,反应时间为20 min、FeCl_(3)与噻吩摩尔比5∶1、温度70℃为最佳反应条件,其噻吩脱除率为94.69%。在328.15~348.15 K温度范围内,符合一级表观反应动力学,其表观反应指前因子和表观反应活化能为19.214 h^(-1)和10.230 kJ·mol^(-1)。To eliminate the adverse effect of thiophenic compounds on the quality of pure benzene produced by coking crude benzene,a non-hydrogenation technology for removing thiophene from coking crude benzene was developed.The effects of type of inorganic lewis acids,composition of simulated coking crude benzene,reaction time,molar ratio and temperature on thiophene removal rate were investigated,and the apparent reaction kinetic of sulfide removal process was studied accordingly.The results showed that among six inorganic lewis acids(including FeCl_(3),CoCl_(2),ZnCl_(2),NiCl_(2),CuCl_(2),CuCl),FeCl_(3)has a better efficiency on the removal of thiophene from simulated coking crude benzene.Utilizing FeCl_(3)to remove thiophene from simulated coking crude benzene with different composition(under the same experimental condition),the order of thiophene removal rate is thiophene/benzene-toluene-xylene>thiophene/toluene>thiophene/benzene.Moreover,the thiophene removal rate increases with the increase of reaction time(0-70 min),molar ratios[(1∶1)-(8∶1)]and temperatures(10-70℃).The removal rate is 94.69%under the optimal conditions with reaction time of 20 min,molar ratio of 5∶1 and temperatures of 70℃.Furthermore,the reaction between thiophene and FeCl_(3)is in accordance with the first-order apparent kinetic equation within 328.15-348.15 K,and the apparent pre-exponential factor and the apparent activation energy are 19.214 h^(-1) and 10.230 kJ·mol^(-1),respectively.

关 键 词：三氯化铁 噻吩 焦化 粗苯 

分 类 号：TQ524[化学工程—煤化学工程]