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- W2381795701 abstract "Co/SiO_2 promoted by BaO was prepared by the method of incipient wetness impregnation. CH_4 decomposition on the catalyst was performed in a fixed-bed reactor under the conditions of reactant gas (5%CH_4-95%Ar) flow rate of 142 ml/min and 450 ℃. TPR, hydrogen chemisorption, and oxygen titration were employed to study the influence of BaO on the reduction performance, Co dispersion and particle size of the Co/SiO_2 catalyst. The presence of BaO affected the TPR performance of Co/SiO_2, and Ba loading of 2% increased the reduction degree of Co/SiO_2 at the moderate temperature (450 ℃). The difference of the TPR performance between unpromoted and promoted catalyst samples could be ascribed to the induction of the reduction of BaO,and the interactions between barium oxide and silica, barium oxide and cobalt oxide. Compared with the unpromoted catalyst, the presence of BaO increased the initial activity and Co dispersion, but decreased the Co particle size. During CH_4 decomposition the deactivation rate of Co/SiO_2 promoted by BaO was dependent upon the Ba loading, and a slower deactivation rate could be achieved whenw(BaO)=0.5%～1.5%. Although the carbon species formed from CH_4 decomposition resulted in the decrease of the initial activity of Co/SiO_2, the majority of carbon species might yield the filamentous carbon during reaction." @default.
- W2381795701 created "2016-06-24" @default.
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- W2381795701 date "2003-01-01" @default.
- W2381795701 modified "2023-09-25" @default.
- W2381795701 title "Reduction Performance of Co/SiO_2 Catalyst Promoted by Barium Oxide and Its Catalytic Activity for Methane Decomposition" @default.
- W2381795701 hasPublicationYear "2003" @default.
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