摘要
通过简单的离子交换法制备出高分散的蒙脱土(MMT)负载Ru催化剂,采用X射线衍射、X射线光电子能谱、程序升温还原和高分辨透射电子显微镜等手段对催化剂进行了表征.结果表明,金属Ru在蒙脱土层间高度分散,Ru的平均粒径约2nm.在喹啉加氢反应中,该催化剂显示出很高的反应活性和选择性.在2MPa和60℃的温和条件下,以水为溶剂时,Ru/MMT催化喹啉加氢生成1,2,3,4-四氢喹啉的选择性高于96.4%,喹啉转化率达99.2%.当温度升高到140℃、压力增加到3MPa时,不需要补加催化剂就可以将喹啉一步加氢生成十氢喹啉,选择性高达98.1%.
A highly dispersed montmorillonite-supported Ru catalyst（Ru/MMT） was prepared by the ion-exchange method and characterized by X-ray diffraction,X-ray photoelectron spectroscopy,temperature-programmed reduction,and high resolution transmission electron microscopy.The results showed that Ru was well dispersed on the montmorillonite interlayers,and the average size of Ru particles was about 2 nm.The catalyst exhibited high activity in the hydrogenation of quinoline under the mild reaction conditions（60℃,2 MPa H2,and H2O as solvent）.The conversion of quinoline was 99.2% and the selectivity for 1,2,3,4-tetrahydroquinoline was 96.4%.When the temperature and hydrogen pressure were increased to 140℃ and 3 MPa,respectively,quinoline could be directly hydrogenated to decahydroquinoline with the selectivity up to 98.1%.
出处
《催化学报》
SCIE
EI
CAS
CSCD
北大核心
2010年第6期695-700,共6页
基金
国家重点基础研究发展计划(973计划
G2000048008)
关键词
蒙脱土
钌
多相催化
喹啉
加氢
1
2
3
4-四氢喹啉
十氢喹啉
montmorillonite
ruthenium
heterogeneous catalysis
quinoline
hydrogenation
1
2
3
4-tetrahydroquinoline
decahydroquino-line
