Preparation of activated ceria and its desulfurization performance
来源期刊：International Journal of Minerals Metallurgy and Materials2015年第9期
论文作者：Qing-chun Yu Yong Deng Fei Wang Yue-bin Feng Xiu-min Chen Bin Yang Da-chun Liu
文章页码：992 - 997
摘 要：Activated ceria（CeO2/γ-Al2O3） prepared by impregnation was characterized by X-ray diffraction（XRD）, scanning electron microscopy（SEM）, and hydrogen temperature-programmed reduction（TPR）. The desulfurization of the activated ceria was investigated by X-ray photoelectron spectroscopy（XPS）, Fourier transform infrared spectroscopy（FT-IR）, and thermogravimetric analysis（TG）. The results showed that ceria could be highly dispersed or crystallized on the surface of γ-alumina. The reduction temperatures of 0.1CeO2/γ-Al2O3, 0.45 CeO2/γ-Al2O3, and CeO2 ranged from 250°C to 470°C, 330°C to 550°C, and 350°C to 550°C, respectively. The reduction peak temperature of 0.45 CeO2/γ-Al2O3 was higher than that of 0.1Ce O2/γ-Al2O3, which was consistent with the reduction temperature of CeO2. O2 participated in the reaction between ceria and sulfur dioxide. The desulfurization product was cerium（III） sulfate. The intensity of the hydroxyl band decreased with the formation of sulfate species.
Qing-chun Yu1,2，Yong Deng1,2，Fei Wang1,2，Yue-bin Feng3，Xiu-min Chen1,2，Bin Yang1,2，Da-chun Liu1,2
1. National Engineering Laboratory for Vacuum Metallurgy,Key Laboratory of Vacuum Metallurgy for Non-ferrous Metal of Yunnan Province, State Key Laboratory of Complex Non-ferrous Metal Resources Clear Utilization2. Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology3. Faculty of Science, Kunming University of Science and Technology
摘 要：Activated ceria（CeO2/γ-Al2O3） prepared by impregnation was characterized by X-ray diffraction（XRD）, scanning electron microscopy（SEM）, and hydrogen temperature-programmed reduction（TPR）. The desulfurization of the activated ceria was investigated by X-ray photoelectron spectroscopy（XPS）, Fourier transform infrared spectroscopy（FT-IR）, and thermogravimetric analysis（TG）. The results showed that ceria could be highly dispersed or crystallized on the surface of γ-alumina. The reduction temperatures of 0.1CeO2/γ-Al2O3, 0.45 CeO2/γ-Al2O3, and CeO2 ranged from 250°C to 470°C, 330°C to 550°C, and 350°C to 550°C, respectively. The reduction peak temperature of 0.45 CeO2/γ-Al2O3 was higher than that of 0.1Ce O2/γ-Al2O3, which was consistent with the reduction temperature of CeO2. O2 participated in the reaction between ceria and sulfur dioxide. The desulfurization product was cerium（III） sulfate. The intensity of the hydroxyl band decreased with the formation of sulfate species.
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