摘要
采用SEM、XRD、微结构分析、IR等对以络合剂提高钛源稳定性体系和以传统体系合成的两种TS-1分子筛样品进行对比测试,并在高的双氧水浓度下考察了丙烯直接环氧化反应效果。结果表明,两种体系合成的TS-1分子筛样品的骨架结构、晶形、比表面积、孔径分布等基本一致,对丙烯直接环氧化的催化性能基本相当,但传统法合成的晶粒大小不一,而以络合剂提高钛源稳定性体系合成的晶粒为均一的均匀薄片状结构。这为较价廉体系合成TS-1分子筛的进一步研究、放大与工业应用提供了可能。
TS-1 molecular sieves were synthesized through two different methods,one was using complex to improve the stability of titanium source and the other was the traditional method. These samples were characterized by using SEM,XRD,micro-structural analysis and IR,and their catalytic performance for propylene epoxidation with high concentration of hydrogen peroxide was investigated. Results showed that the TS-1 samples prepared by the two different methods have the same frame structure,shape,surface area and pore size distribution etc.,and their catalytic performance is also appropriately the same. However,the grain size form the traditional method is not uniform,while that from the method using complex to improve the stability of titanium source appears as lamellate uniform TS-1 molecular sieve. These results provide a possibility for the further study of TS-1 preparation and its industrial application through a relatively inexpensive synthetic process.
出处
《化工进展》
EI
CAS
CSCD
北大核心
2010年第2期264-268,共5页
Chemical Industry and Engineering Progress
基金
华东理工大学选拔培养优秀青年教师科研专项基金资助项目
关键词
TS-1分子筛
络合
丙烯环氧化
TS-1 molecular sieves complex propylene epoxidation
