改性Y型分子筛对FCC汽油脱硫性能的研究  

Performance of adsorptive desulfurization for FCC gasoline over modified Y zeolites

作　　者：董世伟[1] 秦玉才[2] 阮艳军[1] 王源[1] 于文广[1] 张磊[1] 范跃超[1] 宋丽娟[1,2] 

机构地区：[1]辽宁石油化工大学石油化工催化科学与技术重点实验室,辽宁抚顺113001 [2]中国石油大学(华东)化学化工学院,山东青岛266555

出　　处：《燃料化学学报》2013年第3期341-346,共6页Journal of Fuel Chemistry and Technology

基　　金：国家自然科学基金(20976077;21076100);国家重点基础研究发展规划(973计划;2007CB216403);辽宁省高校创新团队支持计划

摘　　要：采用液相离子交换法制备了Cu(I)Y、NiY、CeY分子筛,利用XRD、ICP/MS、N2吸附脱附等技术对其物化性质进行了表征,使用固定床技术和色谱-硫化学发光检测(SCD)偶联技术系统考查了改性Y分子筛对FCC汽油的选择性吸附脱硫性能,着重探讨了FCC汽油选择性吸附脱硫过程中硫化物的脱除规律。结果表明,不同金属阳离子改性的Y分子筛对FCC汽油中不同硫化物选择性有所不同,对CeY分子筛:2-甲基-5-乙基噻吩<噻吩<C3硫醇<C2噻吩<2或3-甲基噻吩<苯并噻吩<3,4-二甲基噻吩≈2,3,4-三甲基噻吩<四氢噻吩,而NiY与Cu(I)Y选择性相同:C3硫醇<2-甲基-5-乙基噻吩<C2噻吩<2或3-甲基噻吩<噻吩<苯并噻吩<3,4-二甲基噻吩≈2,3,4-三甲基噻吩<四氢噻吩,改性Y分子筛对噻吩及小分子烷基取代噻吩类硫化物的选择性较差。Cu（I） Y, NiY and CeY zeolites were prepared by liquid phase ion exchange and characterized by means of XRD, ICP/MS and N2 physisorption. Properties of selective adsorptive desulfurization of FCC gasoline on the adsorbents have been investigated by fixed-bed adsorption experiment and GC-SCD technique, especially the removal selectivity of the sulfur compounds in the oils. The results indicated that the removal selectivities of the sulfur compounds in the gasoline were quite discrepant for different adsorbents, among which, CeY had the sequence of 2-ethyl-5-methylthiophene 〈 thiophene 〈 C3 mercaptan 〈 C2-thiophene 〈 2 or 3-methylthiophene 〈 benzothiophene〈3,4-dimethylthiophene ~ 2,3,4-trimethylthiophene 〈tetrahydrothiophene, while Cu （I） Y and NiY had similar sulfur selectivities with the sequence of C3 mercaptan〈2-ethyl-5-methylthiophene〈C2-thiophene〈 2 or 3-methylthiophene 〈 thiophene 〈 benzothiophene 〈 3,4-dimethylthiophene 2, 3,4-trimethylthiophene 〈 tetrahydrothiophene. Additionally, it was found that modified Y zeolites had poor removal selectivities of thiophenes and small alkylthiophene molecules.

关 键 词：Y分子筛 FCC汽油 吸附脱硫 吸附选择性 

分 类 号：TE624.5[石油与天然气工程—油气加工工程]