引用本文:
孙菲菲, 钟顺和. 丙烯在Au/TiO2催化剂上的化学吸附与临氢环氧化反应[J]. 应用化学,
2003, 20(9): 849-852.
Citation: SUN Fei-Fei, ZHONG Shun-He. Chemsorption of Supported Au/TiO2 Catalyst in Direct Epoxidation of Propylene[J]. Chinese Journal of Applied Chemistry, 2003, 20(9): 849-852.
Citation: SUN Fei-Fei, ZHONG Shun-He. Chemsorption of Supported Au/TiO2 Catalyst in Direct Epoxidation of Propylene[J]. Chinese Journal of Applied Chemistry, 2003, 20(9): 849-852.
丙烯在Au/TiO2催化剂上的化学吸附与临氢环氧化反应
English
Chemsorption of Supported Au/TiO2 Catalyst in Direct Epoxidation of Propylene
Abstract:
The supported catalyst Au/TiO2 was prepared by deposition-precipitation method. Chemsorbility of the catalyst was studied by in situ IR and TPD techniques and activity of the catalyst was tested in a micro-reactor. The results revealed that propylene is chemisorbed on Lewis acid sites Tin+ on the surface of Au/TiO2 through C-C bond and newly formed propylene oxide is chemisorbed on Tin+ through the oxygen of its epoxy ring. The selectivity of propylene oxide in propylene epoxidation over Au/TiO2 is 93% and conversion of propylene is 0.76%. Au nano-particles adsorb H2 and O2 and transform them into peroxide species, which diffuse to Ti site, leading to the formation of propylene oxide.
-
Key words:
- Au/TiO2
- / propylene
- / epoxidation
-
-
扫一扫看文章
计量
- PDF下载量: 0
- 文章访问数: 0
- HTML全文浏览量: 0
下载:
