Potassium-decorated active carbon supported Co-Mo-based catalyst for water-gas shift reaction
Xiao, RuiFen（Fujian Normal Univ, Minnan Sci & Technol Inst）
- 化学化工－已发表论文 
The effect of potassium-decoration was studied on the activity of water-gas shift (WGS) reaction over the Co-Mo-based catalysts supported on active carbon (AC), which was prepared by incipient wetness co-impregnation method. The decoration of potassium on active carbon in advance enhances the activities of the CoMo-K/AC catalysts for WGS reaction. Highest activity (about 92% conversion) was obtained at 250 degrees C for the catalyst with an optimum K(2)O/AC weight ratio in the range from 0.12 to 0.15. The catalysts were characterized by TPR and EPR, and the results show that activated carbon decorated with potassium makes Co-Mo species highly dispersed, and thus easily reduced and sulfurized. XRD results show that an appropriate content of potassium-decoration on active carbon supports may favors the formation of highly dispersed Co(9)S(8)-type structures which are situated on the edge or a site in contact with MoS(2), K-Mo-O-S, Mo-S-K phase. Those active species are responsible for the high activity of CoMo-K/AC catalysts.
CitationJOURNAL OF NATURAL GAS CHEMISTRY，2011,20（1）：77-83