Preparation and characterization of Ce-Fe-Zr-O（x）/MgO complex oxides for selective oxidation of methane to synthesize gas
来源期刊：Journal of Rare Earths2010年第S1期
论文作者：程显名 王华 魏永刚 李孔斋 祝星
文章页码：316 - 321
摘 要：A series of Ce-Fe-Zr-O（x）/MgO（x denotes the mass fraction of Ce-Fe-Zr-O,x=10%,15%,20%,25%,30%） complex oxide oxygen carriers for selective oxidation of methane to synthesis gas were prepared by the co-precipitation method.The catalysts were characterized by means of X-ray diffraction and H2-TPR.The XRD measurements showed that MgFeO4 particles were formed and Fe2O3 particles well dispersed on the oxygen carriers.The reactions between methane diluted by argon（10% CH4） and oxygen carriers were investigated.Suitable content of CeO2/Fe2O3/ZrO2 mixed oxides could promote the reaction between methane and oxygen carriers.There are mainly two kinds of oxygen of carriers:surface lattice oxygen which had higher activity but lower selectivity,and bulk lattice oxygen which had lower activity but higher selectivity.Among all the catalysts,Ce-Fe-Zr-O（20%）/MgO exhibited the best catalytic performance.The conversion of the methane was above 56%,and the selectivity of the H2 and CO were both above 93%,the ratio of H2/CO was stable and approached to 2 for a long time.
程显名1，王华2，魏永刚2，李孔斋2，祝星2
1. Faculty of Chemical Engineering,Kunming University of Science and Technology2. Faculty of Metallurgy and Energy Engineering,Kunming University of Science and Technology
摘 要：A series of Ce-Fe-Zr-O（x）/MgO（x denotes the mass fraction of Ce-Fe-Zr-O,x=10%,15%,20%,25%,30%） complex oxide oxygen carriers for selective oxidation of methane to synthesis gas were prepared by the co-precipitation method.The catalysts were characterized by means of X-ray diffraction and H2-TPR.The XRD measurements showed that MgFeO4 particles were formed and Fe2O3 particles well dispersed on the oxygen carriers.The reactions between methane diluted by argon（10% CH4） and oxygen carriers were investigated.Suitable content of CeO2/Fe2O3/ZrO2 mixed oxides could promote the reaction between methane and oxygen carriers.There are mainly two kinds of oxygen of carriers:surface lattice oxygen which had higher activity but lower selectivity,and bulk lattice oxygen which had lower activity but higher selectivity.Among all the catalysts,Ce-Fe-Zr-O（20%）/MgO exhibited the best catalytic performance.The conversion of the methane was above 56%,and the selectivity of the H2 and CO were both above 93%,the ratio of H2/CO was stable and approached to 2 for a long time.
关键词：
