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《Journal of Chemical Industry and Engineering(China)》 2008-06
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Preparation of novel catalyst Sr_2FeMoO_6 and its catalytic performance in methane combustion

HU Ruisheng,BAO Morigengaowa, XU Na, MA Lan(School of Chemistry and Chemical Engineering, Key Laboratory of Rare Earth Materials,Inner Mongolia University, Hohhot 010021, Inner Mongolia, China)  
The double perovskite catalyst Sr2FeMoO6 was prepared by the sol-gel method using glucose as complex agent, at 1100℃ for 3 h.The structure and performance of the catalyst prepared in various calcination atmospheres (H2/N2 mixed gas, argon, and air atmospheres) were investigated.The catalyst was characterized by means of X-ray diffraction (XRD), temperature programmed reduction (TPR), Fourier transform infrared spectroscopy (FT-IR),specific surface area and magnetism techniques.Meanwhile the catalytic activity of double perovskite Sr2FeMoO6 in methane catalytic combustion was investigated.The XRD results indicated that single-phase double Sr2FeMoO6 was found in the catalyst, calcined in H2/N2 mixed gas.Double perovskite was the dominant phase, accompanied by a few scheelite-type SrMoO4 in the catalyst calcined in argon atmosphere,whereas besides double perovskite phase a stronger SrMoO4 phase was found in the catalyst calcined in air atmosphere.FT-IR and TPR results indicated that TPR spectrum and infrared spectroscopy of catalyst calcined in different atmospheres were different.The catalyst calcined in H2/N2 mixed gas had better magnetic property, whereas the catalyst calcined in argon and air atmospheres had little magnetism.The T10(temperature for 10% methane conversion) and T100(temperature for 100% methane conversion) of single-phase Sr2FeMoO6 double peroskite were 475℃and 744℃ respectively.So single-phase double perovskite Sr2FeMoO6 had good catalytic activity for methane catalytic combustion.
【Fund】: 国家自然科学基金项目(20763003);; 教育部春晖计划项目(Z2004215028);; 内蒙古自然科学基金重点项目(200408020203)~~
【CateGory Index】: O643.3
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