| Synthesis of a new meso／microporous composite molecular sieve of MCM-41／mordenite |
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| 作者姓名： | WANGShan DOUTao LIYuping ZHANGYing YANZichun LIXiaofeng |
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| 作者单位： | [1]InstituteofSpecialChemicals,TaiyuanUniversityofTechnology,Taiyuan030024,China [2]InstituteofSpecialChemicals,TaiyuanUniversityofTechnology,Taiyuan030024,China／／TheCNPCKeyLaboratoryofCatalysis,UniversityofPetroleum,Beijing102249,China [3]TheCNPCKeyLaboratoryofCatalysis,UniversityofPetroleum,Beijing102249,China |
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| 摘 要： | An MCM-41/mordenite composite with twofold 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.
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| 关 键 词： | 发光沸石 合成分子网 MCM．41 二级建筑 |
| 收稿时间： | 2004-08-19 |
Synthesis of a new meso/ microporous composite molecular sieve of MCM-41/ mordenite |
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| WANGShan DOUTao LIYuping ZHANGYing YANZichun LIXiaofeng.Synthesis of a new meso/ microporous composite molecular sieve of MCM-41/ mordenite[J].Chinese Science Bulletin,2005,50(12):1180-1184. |
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| Authors: | Shan Wang Tao Dou Yuping Li Ying Zhang Zichun Yan Xiaofeng Li |
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| Institution: | WANG Shan1, DOU Tao1,2, LI Yuping1, ZHANG Ying2, YAN Zichun1 & LI Xiaofeng 1 1. Institute of Special Chemicals, Taiyuan University of Technology, Taiyuan 030024, China; 2. The CNPC Key Laboratory of Catalysis, University of Petroleum, Beijing 102249, China |
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| Abstract: | 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. |
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| Keywords: | zeolite mordenite composite molecular sieve MCM-41 secondary building units |
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