微孔-双介孔核壳型HZSM-5@BMMs催化甲醇芳构化  

Studies on Micro-bimodal Mesoporous Core-shell HZSM-5@BMMs Catalyst for Methanol to Aromatics

作　　者：王璐 许立兴 李剑[1] 任浩楠 楚爽 王丽娟 杨丽娜[1] WANG Lu;XU Li-xing;LI JianI;REN Hao-nan;CHU Shuang;WANG Li-juanl;YANG Li-na(,College of Petrochemical Engineering,Liaoning Shihua University,Fushun 113001,Liaoning,China;Fushun Petrochemical Corporation Catalyst Plant,Fushun 113001,Liaoning,China)

机构地区：[1]辽宁石油化工大学石油化工学院,辽宁抚顺113001 [2]抚顺石化公司催化剂厂,辽宁抚顺113001

出　　处：《精细化工》2018年第9期1562-1566,1588,共6页Fine Chemicals

基　　金：辽宁省高等学校杰出青年学者成长计划(LJQ2015062);辽宁省科学技术厅项目(20170540585);辽宁省教育厅项目(L2015296,L2016018);抚顺市科技计划项目(FSKJHT201376)~~

摘　　要：采用外延法，以HZSM-5为核，双介孔分子筛BMMs为壳制备了多级孔核壳型HZSM-5@BMMs甲醇芳构化（MTA）催化剂。采用XRD、BET、NH3．TPD、SEM和TEM对催化剂进行了表征。结果表明：HZSM-5@BMMs具有明显的核壳结构和微孔．双介孔多级孔孔道，孔径集中分布于O．9、2．2和5．3rim，其比表面积（510．8m2／g）和孔容（0．399cm3／g）均高于HZSM-5的比表面积（408．4m2／g）和孔容（0．190cm3／g），而酸量（0．573mmol／g）和酸强度均低于HZSM-5的酸量（0．883mmol／g）和酸强度。相同反应条件下HZSM-5@BMMs寿命比HZSM-5增加38h，最高芳烃收率为25．7％，最高BTX（轻质芳烃：苯、甲苯、二甲苯）选择性为55．3％。A hierarchical porous HZSM-5@BMMs catalyst for methanol to aromatics （MTA） was synthesized by epitaxial growth method using bimodal mesoporous BMMs as shell and HZSM-5 zeolite as core. The obtained catalyst was characterized by XRD, BET, NH3-TPD, SEM and TEM. The results indicated that HZSM-5@BMMs had an obvious core-shell structure with micro-bimodal mesoporous structure and the pore size mainly concentrated in 0.9, 2.2 and 5.3 nm. The specific surface area and pore volume of HZSM-5@BMMs were 510.8 m2/g and 0.399 cm3/g, respectively, higher than those of HZSM-5 （408.4 m2/g, 0.190 cm3/g）. However, the acid amount of HZSM-5@BMMs was 0.573 mmol/g, which was lower than that of HZSM-5 （0.883 mmol/g）. In addition, the acid intensity of HZSM-5@BMMs was lower than that of HZSM-5. It was shown that the longevity of HZSM-5@BMMs in MTA under the same condition was 38 h longer than that of HZSM-5, and the highest yield of aromatics and the selectivity of BTX （light aromatics： benzene, toluene, xylene） on HZSM-5@BMMs were 25.7% and 55.3%, respectively.

关 键 词：HZSM-5 BMMs 多级孔 核壳 甲醇芳构化 催化技术 

分 类 号：TQ246[化学工程—有机化工]