Effect of promoters on the catalytic performance of Ni/Al2O3 catalyst for partial oxidation of methane to syngas |
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Authors: | Hai-tao Wang Zhen-hua Li Shu-xun Tian |
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Affiliation: | (1) Key Lab for Green Chemical Technology, School of Chemical Engineering and Technology, Tianjin University, Tianjin, 300072, China |
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Abstract: | The effect of promoters such as Ce, La and Ca on catalytic performance of Ni catalyst was measured in a continuous fixed bed reactor. The effect of promoters on Ni/a-Al2O3 catalyst is more significant than on Ni/g-Al2O3 catalyst. Ce was proved to be the best promoter among the three promoters tested and the optimum loading of Ce was 1%. The catalyst was characterized by TG, XPS, TPR and XRD techniques. TPR results showed that Ce can improve the reducibility of the Ni/Al2O3 catalyst. XRD results indicated that Ce was highly dispersed when its loading was low, but at higher loading it was crystallized into bulk CeO2, thus, decreased the catalytic activity. This revised version was published online in June 2006 with corrections to the Cover Date. |
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Keywords: | syngas partial oxidation promoter Methane Ni |
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