Journal of South China University of Technology (Natural Science Edition) ›› 2007, Vol. 35 ›› Issue (6): 86-90,115.

• Chemistry & Chemical Engineering • Previous Articles     Next Articles

Comparison of Synthesis of Meso-Pore Zeolite M CM -41 by Microwave Crystallization , Room-Temperature Crystallization and Hydrothermal Crystallization

Xia Qi-bin1  Chen Hui-yong1  Xi Hong-xia1  Li Zhong1  Wang Huan2   

  1. 1. Key Laboratory of Enhanced Heat Transfer and Energy Conservation of the Ministry of Education , South ChinaUniv. of Tech. , Guangzhou 510640 , Guangdong , China; 2. Dept. of Chemical Engineering ,Hong Kong Univ. of Science and Tech. , Clear Water Bay , Hong Kong , China
  • Received:2006-07-25 Online:2007-06-25 Published:2007-06-25
  • Contact: 夏启斌(1974-)，博士，讲师，主要从事环境能源材料研究. E-mail:qbxia@scut. edu.cn
  • About author:夏启斌(1974-)，博士，讲师，主要从事环境能源材料研究.
  • Supported by:

    国家自然科学基金资助项目(20476031) ;广东省自然科学基金资助项目(04020120 )

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Abstract:

Meso-pore zeolite MCM - 41 was synthesized by means of microwave crystallization , room-temperature crystallization and hydrothermal crystallization. Then , the operation parameters of these three methods and the physical properties of the resulted MCM-41 were compared in detail. Experimental results suggest that (1) MCM-41 prepared via microwave crystallization possesses better properties than that prepared via room-temperature crystallization, even better than that prepared via the traditional hydrothermal crystallization j (2) microwave crystallization is energy-saving and eco-friendly , and is easy to operate without CIγstalline conversion in the crystallization process j (3) the synthesis period of microwave crystallization is 2 - 3 times less than that of the traditional hydrothermal crystallization j (4) the resulted M CM -41 prepared via microwave crystallization possesses high dispersion degree , narrow pore size distribution , good thermal stability (more than 900℃) and excellent hydrothermal stability ,and is of a specifie surface area of more than 1000 m2/g， a crystal diameter of 30 nm , a pore volume of 1. 178 mL/g and a pore wall thickness of 2. 55 nm. It is thus concluded that the microwave crystallization , instead of the traditional hydrothermal one , will become a practical technology for synthesizing MCM-41.

Key words: zeolite, microwave crγstallization, room-temperature crystallization, hydrothermal crystallization