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Citation: Li Xin-Sheng, Hou Zhen-Shan, Xin Qin, Guo Xie-Xian. Characterization of Promotions of Cobalt and Ruthenium in Sulfided Catalysis for Hydrodesulfurization[J]. Acta Physico-Chimica Sinica, ;1993, 9(01): 63-69. doi: 10.3866/PKU.WHXB19930111 shu

Characterization of Promotions of Cobalt and Ruthenium in Sulfided Catalysis for Hydrodesulfurization

1.
Dalian Institute of Chemical Physica, Chinese Academy of Sciences, Dalian 116023

Received Date: 30 September 1991
Available Online: 15 February 1993

Temperature programmed reduction and volumetric chemisorption of O_2, H_2 and CO have been used to provide insight into the functions of cobalt and ruthenium in a series of sulfided Co-Mo/Al_2O_3, Ru-Mo/Al_2O_3, Ru-Co-Mo/Al_2O_3 catalysts. Cobalt interacted with molybdenum to form a stable species, i.e. CoMoS phase, which decreased the amount of oxygen chemisorption and increased uptake of CO on the Co-Mo/Al_2O_3 catalyst. Ru promotion is found to cause reduction temperature of Mo sites shifting to lower temperature and increase obviousely the amounts of O_2 and H_2 adsorbed on Mo sites. The function of ruthenium is explained by a concept of hydrogen spillover from Ru centers to Mo sites.
- Ru-Co-Mo/Al₂O₃; Sulfided catalysts; Temperature programmed reduction; Volumetric chemisorption
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