MWW分子筛上1-己烯的异构化  

Isomerization of n-Hexene Over MWW Type Zeolite

作　　者：房东[1] 黄崇品[1] 孙秀良[1] 陈标华[1] 

机构地区：[1]北京化工大学化工资源有效利用国家重点实验室,北京100029

出　　处：《化学反应工程与工艺》2008年第1期7-11,共5页Chemical Reaction Engineering and Technology

基　　金：国家重点基础研究发展规划"973"项目资助(2004CB217804)

摘　　要：制备了MWW系列的HMCM-22,HMCM-36和HITQ-2分子筛催化剂,并分别进行了X射线衍射(XRD),N2吸脱附,NH3程序升温脱附(TPD),红外光谱(IR)表征。在脉冲反应器上评价了上述分子筛对1-己烯在流化催化裂化(FCC)条件下异构化反应的催化性能,并与HZSM-5分子筛进行了对比。结果表明,MWW系列分子筛的异构化能力较强,MCM-36和ITQ-2由于具有较大的比表面积和孔容,因而异构化能力又高于MCM-22;HZSM-5分子筛具有更多的强酸中心,芳构化和裂解能力强,对异构化反应不利。上述分子筛异构化能力由强到弱排列顺序为:HITQ-2>HMCM-36>HMCM-22>HZSM-5。MWW type of HMCM-22, HMCM-36 and HITQ-2 zeolites were prepared and characterized by X-ray diffraction （XRD）, N2 adsorption isotherms, temperature programmed desorption of ammonia （TPD） and infrared spectra （IR）. The n-hexene isomerization over MWW type zeolites and HZSM-5 were investigated in a pulse micro-reactor under fluid catalytic cracking （FCC） condition. It was found that all MWW type zeolites investigated possessed excellent catalytic performance for the isomerization of n-hexene comparing with HZSM-5. Owing to their large accessible external surfaces, HMCM-36 and HITQ-2 ulteriorly exhibited higher isomerization activity and selectivity than HMCM-2. HZSM-5 showed high active of aromatization and cracking for n-hexene, which could be attributed to its large amount of strong acid sites. The isomerization ability of zeolites was in the order of HITQ-2〉HMCM-36〉HMCM-22〉HZSM-5.

关 键 词：分子筛催化剂 1-己烯 异构化 芳构化 裂解 

分 类 号：TE624.47[石油与天然气工程—油气加工工程] TQ221.217[化学工程—有机化工]