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| Synthesis and characterization of MCM-41 /7-Al203 composite |
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HUANG Wei-li1,LIU Bai-jun1,SUN Fa-min2,ZHANG Zhi-hua2,BAO Xiao-jun1,GAO Shan-song1
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(1. Key Laboratory of Catalysis, China National Petroleum Corporation，China University of Petroleum, Beijing 102249, China;2. Research Institute of Daqing Petrochemical Company, China National Petroleum Corporation，Daqing 163714, China )
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| Abstract: |
| A novel MCM-41/y-A^C^ composite was obtained by overgrowth of MCM-41 on the surface of y-A^CV The effects of surfactant amount, ratio of ?(Si) to n (Al) in the feed and pH value of synthesis mother liquid on crystallinity of MCM-41 in composite were investigated. The results indicate that the crystallinity of MCM-41 in composite, in the conditions of ratio of n (CTMABr) to n (Sip2) greater than 0.32, ratio of w (Si) to w (Al) greater than 4.68 and pH value equal to 10.5，was similar to that of Si-MCM-41. The composite was characterized by means of X-ray diffraction, scanning electron microscopy, transmission electron microscopy and low temperature nitrogen adsorption-desorption techniques. The results show that MCM-41 /is a composite with MCM-41 overgrowing on the surface of 7-AI2Q3 and MCM-41 in composite is thermally stable. |
| Key words: MCM-41 /y-AI2O3 composite overgrowth synthesis characterization |
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