烯烃对Ce(Ⅳ)Y分子筛选择性吸附脱硫的影响  

EFFECT OF OLEFINS ON THE ADSORPTIVE DESULFURIZATION OF MODEL FUEL WITH Ce(Ⅳ)Y ZEOLITE

作　　者：王洪国[1] 宋丽娟[1,2] 靳玲玲[2] 孙兆林[1,2] 

机构地区：[1]中国石油大学化学化工学院,东营257061 [2]辽宁石油化工大学辽宁省石油化工重点实验室

出　　处：《石油炼制与化工》2009年第8期46-49,共4页Petroleum Processing and Petrochemicals

基　　金：国家自然科学基金项目(No.20476042和No.20776064);国家重点基础研究计划(973项目)(2007CB216403)

摘　　要：以含噻吩的模拟油为原料,考察不同烯烃类型及含量对Ce(Ⅳ)Y分子筛选择性吸附脱硫性能的影响。静态脱硫试验结果表明,当模拟油中存在微量的烯烃(0.03%)时,对Ce(Ⅳ)Y的脱硫效果影响较小;随着烯烃含量的增加,Ce(Ⅳ)Y分子筛的深度脱硫能力显著降低。在相同烯烃含量时,不同烯烃类型对Ce(Ⅳ)Y分子筛的脱硫效果影响程度由大到小的顺序为:1,5-己二烯>环己烯>1-己烯≈1-辛烯。吸附前后Ce(Ⅳ)Y分子筛样品的FT-IR分析结果表明,噻吩通过两种吸附模式作用在Ce(Ⅳ)Y分子筛上,Ce(Ⅳ)Y分子筛能够选择性吸附含微量烯烃(0.03%)的模拟油中的噻吩;而对烯烃含量高(3%)的模拟油脱硫时,分子筛直接和烯烃的双键发生强相互作用,占据吸附剂的活性位,导致Ce(Ⅳ)Y分子筛脱硫性能显著降低。The influence of olefin compounds on the selective adsorption desulfurization of thiophene containing model fuels was investigated using CeY zeolite as adsorbent. The static desulfurization results showed that the effect of minor olefin（0. 03%）in model fuel on the desulfurization was not significant. However, with the increase of olefin content in the model fuel, the deep desulfurization function of Ce （ Ⅳ ） Y zeolite reduced significantly. The effect of various olefin compounds on the desulfurization was varied and was found to follow the order of 1,5-hexadiene〉cyelohenxene〉1- hexenem ≈1-octene. FT-IR spectra of the Ce（Ⅳ）Y zeolite samples prior and post to thiopbene adsorption showed that there are two kinds of adsorption patterns on the Ce（ Ⅳ ）Y zeolite： when the olefin content in model fuel was minor（less than 0.03 %）, thiophene molecules were selectively adsorbed on Ce（ Ⅳ ）Y via S-M interaction; when olefin content in model fuel was over 3 %, the direct interaction of olefin double bond and Ce（Ⅳ）Y zeolite resulted in the occupation of absorbent active sites,which might be the main cause of decreasing desulfurization function of Ce（Ⅳ）Y zeolite.

关 键 词：分子筛 Ce改性 脱硫 烯烃 FT-IR 

分 类 号：TE624.5[石油与天然气工程—油气加工工程]