Effects of Polyvinylpyrrolidone on the Preparation of Supported La2O3 Catalysts by a Modified Impregnation Method for the Oxidative Coupling of Methane

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	Effects of Polyvinylpyrrolidone on the Preparation of Supported La2O3 Catalysts by a Modified Impregnation Method for the Oxidative Coupling of Methane
	Hou, Yu-Hui ; Lin, Yin-Liang ; Li, Qi ; Weng, Wei-Zheng ; Xia, Wen-Sheng ; Wan, Hui-Lin ; Weng WZ(翁维正) ; Xia WS(夏文生) ; Wan HL(万惠霖)
刊名	http://dx.doi.org/10.1002/cctc.201300667
	2013
关键词	OCM REACTION SELECTIVE OXIDATION ACTIVE-SITES OXIDES OXYGEN CO2 FORMALDEHYDE PERFORMANCE CONVERSION SR
英文摘要	Ministry of Science and Technology of China [2010CB732303]; National Natural Science Foundation of China [21033006, 21373169]; NFFTBS [J1310024]; Program for Changjiang Scholars and Innovative Research Team in the University [IRT1036]; The direct transformation of methane, such as oxidative coupling of methane (OCM), is a long-standing challenge in methane utilization. Keeping this objective in mind, we explored the dispersion and acid-base effects of the catalysts on OCM. Herein, we prepared a series of La2O3/MgO catalysts by using a modified impregnation method with polyvinylpyrrolidone added to impregnated solutions. The BET, XRD, SEM, and TEM characterizations of the samples confirm that La2O3 dispersion on MgO increases with the addition of polyvinylpyrrolidone and the particles become smaller in size and more uniform in distribution. High catalytic performances (e.g., the C-2 yield approximate to 16%) of the well-dispersed La2O3/MgO catalysts for OCM are demonstrated at a lower temperature (e.g., 550 degrees C) and a lower loading (e.g., 1.9wt%). In addition, with the modification of acid-base properties of the supports, we find that base properties of the supports are responsible for C-2 formation and acidic properties of the supports are responsible for COx formation. These properties establish a good correlation of the dispersion and basicity of the catalysts with the catalytic performances of the catalysts for OCM.
语种	英语
出版者	WILEY-V C H VERLAG GMBH
内容类型	期刊论文
源URL	[http://dspace.xmu.edu.cn/handle/2288/88710]
专题	化学化工－已发表论文
推荐引用方式 GB/T 7714	Hou, Yu-Hui,Lin, Yin-Liang,Li, Qi,et al. Effects of Polyvinylpyrrolidone on the Preparation of Supported La2O3 Catalysts by a Modified Impregnation Method for the Oxidative Coupling of Methane[J]. http://dx.doi.org/10.1002/cctc.201300667,2013.
APA	Hou, Yu-Hui.,Lin, Yin-Liang.,Li, Qi.,Weng, Wei-Zheng.,Xia, Wen-Sheng.,...&万惠霖.(2013).Effects of Polyvinylpyrrolidone on the Preparation of Supported La2O3 Catalysts by a Modified Impregnation Method for the Oxidative Coupling of Methane.http://dx.doi.org/10.1002/cctc.201300667.
MLA	Hou, Yu-Hui,et al."Effects of Polyvinylpyrrolidone on the Preparation of Supported La2O3 Catalysts by a Modified Impregnation Method for the Oxidative Coupling of Methane".http://dx.doi.org/10.1002/cctc.201300667 (2013).