Synthesis of MCM–41 mesoporous molecular sieves containing heteroatoms and their catalytic activity |
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Authors: | ZHOU Huafeng YANG Yongjin ZHANG Jinsong |
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Affiliation: | 1.Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016
2.School of Applied Chemistry, Shenyang Institute of Chemical Technology, Shenyang 110142 |
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Abstract: | MCM–41 mesoporous molecular sieves containing heteroatoms (Zn, Ni, Fe, Al, Cu, Ce) (T–MCM–41) were synthesized by direct hydrothermal process and were applied in the synthesis of dioctyl phthalate (DOP) in this paper. The effects of different heteroatoms incorporation on structure, specific surface area and pore volume, aciditity and catalytic activity of T–MCM–41 were investigated. The results show that T–MCM–41 which still remains the well–ordered hexagonal mesostructure of MCM–41 has high surface area (550–900 m2/g), large pore diameter (∼3 nm). Meanwhile, it has high catalytic activity and selectivity in DOP synthesis because heteroatoms incorporation can produce acid centers. When T–MCM– 41 (T=Zn, Fe, Al, Cu) is used as the catalyst, the conversion of phthalic anhydride (PA) reaches above 95.5% and DOP selectivity reaches above 96.5% in 5 h. Moreover, T–MCM–41 has good stability and Al–MCM–41 holds good catalytic activity after being reused five times. |
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Keywords: | inorgnic non&ndash metallic materials mesoporous molecular sieve MCM&ndash 41 dioctyl phthalate |
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