Synthesis of a new meso/microporous composite molecular sieve of MCM-41/mordenite

作     者：WANGShan DOUTao LIYuping ZHANGYing YANZichun LIXiaofeng 

作者机构：InstituteofSpecialChemicalsTaiyuanUniversityofTechnologyTaiyuan030024China InstituteofSpecialChemicalsTaiyuanUniversityofTechnologyTaiyuan030024China//TheCNPCKeyLaboratoryofCatalysisUniversityofPetroleumBeijing102249China TheCNPCKeyLaboratoryofCatalysisUniversityofPetroleumBeijing102249China 

出 版 物：《Chinese Science Bulletin》 (中国科学通报)

年 卷 期：2005年第50卷第12期

页      面：1180-1184页

核心收录：

学科分类：08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 

基　　金：supported by the National Natural Science Foundation of China(Grant Nos.20173039 and 20476060) the National Basic Research Program of China(Grant No.2004CB2 17806) the Petrochina Chemical Company Limiled 

主　　题：发光沸石 合成分子网 MCM.41 二级建筑 

摘      要：An MCM-41/mordenite composite with two- fold porous structure and stepwise-distributed acidity was prepared for the first time by using zeolite mordenite as the silica-alumina source. The composite molecular sieve has been investigated and compared with a mechanical mixture of mordenite and MCM-41 for their structure, acidity and catalytic activity by means of XRD, N2 adsorption and desorption, HRTEM, DTG, NH3-TPD and catalytic reaction. The characterization results show that the structure and property of the composite molecular sieve are quite different from those of the mechanical mixture, which might be ascribed to the incorporation of secondary building units characteristic of zeolite mordenite into the mesoporous walls of the composite which gives rise to the thicker mesoporous walls, the higher hydrothermal stability and more strong acid sites. Furthermore, the new strategy could be used as a new general method for the preparation of catalysts for the reaction system with multifold large molecules, and the results were well confirmed by the dealkylation of C10+ aromatic hydrocarbon.