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dc.contributor.authorDai Maohua
dc.contributor.authorTang Dingliang
dc.contributor.authorYuan Youzhu
dc.contributor.author袁友珠
dc.date.accessioned2011-06-22T06:46:01Z
dc.date.available2011-06-22T06:46:01Z
dc.date.issued2006
dc.identifier.citationCHINESE JOURNAL OF CATALYSIS,2006,27(12):1063-1068zh_CN
dc.identifier.issn0253-9837
dc.identifier.urihttps://dspace.xmu.edu.cn/handle/2288/9722
dc.description.abstractTitania-silica mixed oxides prepared by hydrolytic and one-step non-hydrolytic sol-gel routes using TICl4 and SiCl4 as precursors were employed as the gold catalyst supports for gas-phase epoxiclation of propylene in O-2 and H-2. Characterization studies of the supports and catalysts were performed by means of X-ray diffraction, ultraviolet-visible absorption spectroscopy, N-2 adsorption, and high-resolution transmission electron microscopy. The results indicated that the amorphous Ti-Si mixed oxides containing 6%-14% of Ti could be prepared by both sol-gel routes, but those by non-hydrolytic sol-gel afforded higher surface area and significant mesopores. A superior catalytic performance was obtained with the gold catalyst supported on the non-hydrolytic sol-gel Ti-Si mixed oxide containing 10% of Ti. The propylene conversion was 5.7% at the initial 60 min and 3.3% at 240 min of time on stream. The selectivity for propylene oxide was as high as 95%. The influences of aging time for the non-hydrolytic sol-gel and pH value for the Au deposition-precipitation on the performance of the Au catalyst were also discussed.zh_CN
dc.language.isozhzh_CN
dc.publisherSCIENCE CHINA PRESSzh_CN
dc.subjectnon-hydrolyticzh_CN
dc.subjectsol-gelzh_CN
dc.subjecttitaniazh_CN
dc.subjectsilicazh_CN
dc.subjectmixed oxidezh_CN
dc.subjectgoldzh_CN
dc.subjectpropylenezh_CN
dc.subjectepoxidationzh_CN
dc.subjectpropylene oxidezh_CN
dc.titleEffect of Ti-Si mixed oxide support on gold catalysts for gas-phase epoxidation of propylenezh_CN
dc.typeArticlezh_CN


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