水热处理时间对甲醇制丙烯工业催化剂性质及反应性能的影响  

Effect of Different Hydrothermal Treatment Time on the Performance of Catalyst for Methanol to Propylene

作　　者：齐静[1] 庄壮[1] 王林[1] 关翀 

机构地区：[1]神华宁夏煤业集团有限责任公司煤制油化工研发中心,宁夏银川750411

出　　处：《化学反应工程与工艺》2017年第5期409-414,共6页Chemical Reaction Engineering and Technology

基　　金：国家国际科技合作专项项目<高效甲醇制丙烯过程合作研究>(2015DFA40660)

摘　　要：采用X射线衍射(XRD)、N_2吸附-脱附和NH3程序升温脱附(NH_3-TPD)等方法对经过不同水热处理时间处理后的甲醇制丙烯(MTP)ZSM-5分子筛催化剂的晶相、孔结构和酸性进行了表征,并考察了不同水热处理时间对该工业催化剂的MTP催化性能的影响。结果表明,经过水热处理,催化剂的晶相结构未发生明显改变,引入的介孔特征随着处理时间的延长而越发明显,酸强度变化不明显,但弱酸量与总酸量均出现了下降。性能评价表明,随着水热处理时间的延长,催化剂单程寿命明显缩短,产物中丙烯的质量分数略有增加,水热处理72 h时丙烯平均选择性较高,为44.45%。X-ray diffraction （XRD）, N2 adsorption-desorption and NH3 temperature programmed desorption（NH3-TPD） methods were used to characterize the crystal phase, pore structure and acidity of the methanol-to-propylene （MTP） ZSM-5 zeolite catalysts treated with different hydrothermal treatments. The effects of different hydrothermal treatment time on the catalytic performance of the industrial catalyst for MTP were investigated. The results showed that the crystal structure of the catalyst did not change significantly after hydrothermal treatment. The mesopore characteristics introduced were more obvious with the extension of treatment time, but the acid strength did not change obviously. However, the amount of weak acid and total acid decreased. The performance evaluation showed that with the prolongation of hydrothermal treatment, the life time of one-way catalyst was obviously shortened, the propylene content in the product slightly increased, and the average selectivity of propylene was 44.45% after hydrothermal treatment for 72 h.

关 键 词：甲醇制 丙烯催化剂 ZSM-5分子 筛水热处理 时间 

分 类 号：TQ031.5[化学工程] TQ221.212