甲醇存在时异丁硫醇在HZSM-5分子筛上的转化反应研究  

Study on the transformation reaction of iso-butyl mercaptan in the presence of methanol

作　　者：于慧征[1] 罗立文[1] 李虎[1] 吕仁庆[1] 夏道宏[1] 

机构地区：[1]中国石油大学化学化工学院重质油国家重点实验室,山东东营257061

出　　处：《化工科技》2006年第2期16-19,共4页Science & Technology in Chemical Industry

基　　金：重质油国家重点实验室开放课题(E030407-2);教育部优秀青年教师资助计划项目(20011863)

摘　　要：在固定床微型反应器中,以异丁硫醇为研究对象,通过其在不同反应条件和稀土改性 HZSM-5分子筛中的一系列反应,探讨其催化转化反应及规律。在HZSM-5及改性催化剂催化条件下, 异丁硫醇在较低温度250℃下就可以有较高的转化率(70％),当温度达到350℃时,异丁硫醇完全转化,生成产物主要为硫化氢;稀土镧负载量对其转化率有较大影响,w(La2O3)=1．0％时有较好的效果; 甲醇的加入对异丁硫醇的转化率有一定提高,甲醇与苯的体积比为0．2时对异丁硫醇转化较为有利,但其液相反应产物趋于复杂,选择性有所降低。The catalytic desulfurization rule of model organic compound iso-butyl mercaptan over HZSM-5 （molar ratio of silica-to-alumina is 25） in the presence of methanol was studied in fixed bed micro-reactor. The experimental results showed that there was a better conversion （70%） for iso-butyl mercaptan at a lower temperature of 250℃, iso-butyl mercaptan was basically converted completely to main product of H2S when reaction temperature was reached 350 ℃ ;There were greater effect of La-modified mount on iso-butyl mercaptan conversion and better conversion while La203 content is 1.0 % in La-HZSM-5 zeolite;There was certain improvement of iso-butyl mercaptan for the addition of methanol, it was favorable for the transformarion of iso-butyl mercaptan and there were more volmne ratio of methanol-to-benzene was 0.2.

关 键 词：甲醇 异丁硫醇 HZSM.5分子筛 La改性 脱硫 

分 类 号：TE624[石油与天然气工程—油气加工工程]