A study on Au/Ti-MCF catalysts for the propylene epoxidation in the presence of H2 and O2

Abstract

与乙烯和氧气在银催化剂上直接氧化生成环氧乙烷不同,目前环氧丙烷的生产主要采用氯醇法和基于有机过氧化物或双氧水的间接氧化法。至今还没有寻找到丙烯和氧气直接氧化生产环氧丙烷的高效催化剂体系,但在氢气氧气共存条件下,含钛复合氧化物载金催化剂能够高选择性(>90%)地催化丙烯环氧化生成环氧丙烷,这条环境友好的新型催化路线具有很好的工业化应用前景,但仍然存在诸多需要克服的缺点,譬如金催化剂制备成本高昂、催化剂活性不足、氢气利用效率偏低、催化剂失活过快等。本学位论文设计并合成出一种通过将纳米金粒子负载在具有大尺寸介孔、孔隙度发达、扩散阻力小的囊泡状钛硅复合材料(Ti-MCF)载体上的新型Au/Ti-MCF...Direct epoxidation of propene using O2 and H2 with gold nanoparticles deposited on Ti-containing supports opens an attractive route for the propene oxide (PO) production since the pioneer work of Haruta and co-workers. This catalytic process possesses tremendous industrial andacademic significance and also is more environmental benign than the current commercial routes (chlorohydrin and hydroperox...学位:理学硕士院系专业:化学化工学院_物理化学学号:2052014115157

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