分子筛/SiC复合材料的制备及应用研究进展

Research progress in preparation and application of molecular sieves/silicon carbide composites

分子筛/SiC复合材料以其易于负载其他活性组分、较好的传热和传质性能等诸多优点引起了研究人员的关注。本文综述了以SiC为载体,制备分子筛/SiC复合材料的不同方法,归纳比较了一次合成法和二次晶种法的优缺点,阐述了近年来分子筛/SiC复合材料作为催化剂或催化剂载体应用于甲醇制二甲醚、甲醇制烯烃、酰基化等强放热反应中的研究现状。指出了优化分子筛/SiC复合材料的制备工艺和条件,进一步深入研究分子筛/SiC复合材料具有优异传热性能的原因是开发出具有工业应用前景的分子筛/SiC催化剂或催化剂载体的关键。

Molecular sieves/SiC composites have been extensively investigated because of its easy loading active constituent,better heat and mass transfer performance. One-step synthesis and secondary growth methods of molecular sieves/SiC composites are summarized regarding their objective composites. Recent advances of molecular sieves/SiC catalyst or catalyst carriers in some strong exothermic reactions are reviewed,such as methanol to dimethyl ether,methanol to olefins,and acylation reactions and so on. To optimize the preparation process and conditions,and to investigate the reason for excellent heat transfer performance are keys to develop molecular sieve/SiC catalysts or catalysts carrier with good industrial application.