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	Direct conversion of methane to methyl acetate with nitrous oxide and carbon monoxide over heterogeneous catalysts containing both rhodium and iron phosphate
	Qiang Yuan ; Qinghong Zhang ; Zhang QH(张庆红) ; Ye Wang ; Wang Y(王野)
	2005-05
关键词	methane oxidative carbonylation methyl acetate nitrous oxide rhodium iron phosphates MCM-41
英文摘要	The formation of methyl acetate during the conversion of CH4 with N2O and CO over heterogeneous catalysts containing both rhodium and iron phosphate was studied. For two series of Rh-doped FePO4 catalysts prepared by different methods, the optimum atomic ratios of Rh/Fe for methyl acetate formation are 1:600-1:400. The Rh-FePO4 catalyst prepared from a mixed aqueous solution exhibits a higher rate and turnover frequency for methyl acetate formation than the Rh/FePO4 prepared by the impregnation method. Characterizations with XRD, diffuse-reflectance UV-vis, TEM, and H-2-TPR suggest that Rh3+ ions are mainly incorporated into the lattice of FePO4 in the Rh-FePO4 prepared from the mixed aqueous solution, whereas Rh(III) species probably exist on the surface of FePO4 in the Rh/FePO4 prepared by impregnation. The support of Rh(III) species and FePO4 by MCM-41 by a co-impregnation method can drastically increase the rate and turnover frequency for methyl acetate formation, whereas a two-step impregnation method leads to catalysts without methyl acetate formation. The dual site containing Rh(III) species and FePO4 in close proximity is proposed to account for methyl acetate formation. A possible reaction mechanism has been proposed on the basis of kinetic investigations. (c) 2005 Elsevier Inc. All rights reserved.
语种	英语
出版者	ACADEMIC PRESS INC ELSEVIER SCIENCE
内容类型	期刊论文
源URL	[http://dx.doi.org/doi:10.1016/j.jcat.2005.04.025]
专题	化学化工－已发表论文
推荐引用方式 GB/T 7714	Qiang Yuan,Qinghong Zhang,Zhang QH,et al. Direct conversion of methane to methyl acetate with nitrous oxide and carbon monoxide over heterogeneous catalysts containing both rhodium and iron phosphate[J],2005.
APA	Qiang Yuan,Qinghong Zhang,张庆红,Ye Wang,&王野.(2005).Direct conversion of methane to methyl acetate with nitrous oxide and carbon monoxide over heterogeneous catalysts containing both rhodium and iron phosphate..
MLA	Qiang Yuan,et al."Direct conversion of methane to methyl acetate with nitrous oxide and carbon monoxide over heterogeneous catalysts containing both rhodium and iron phosphate".(2005).

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