Catalytic oxidation of methane over PdO in wire microcalorimetry

CORC > 力学研究所 > 中国科学院力学研究所 > 高温气体动力学国家重点实验室

	Catalytic oxidation of methane over PdO in wire microcalorimetry
	Zhang TC(张泰昌); Xin YX; Ren ZY; Qi F; Law CK
刊名	COMBUSTION AND FLAME
	2013-01
通讯作者邮箱	cklaw@princeton.edu
卷号	160 期号:1 页码:149-154
关键词	Catalytic oxidation Pd-based catalyst Methane combustion Mechanism
ISSN号	0010-2180
通讯作者	Law, CK (reprint author), Princeton Univ, Dept Mech & Aerosp Engn, Princeton, NJ 08544 USA.
产权排序	[Zhang, Taichang; Xin, Yuxuan; Law, Chung K.] Princeton Univ, Dept Mech & Aerosp Engn, Princeton, NJ 08544 USA; [Ren, Zhuyin] Univ Connecticut, Dept Mech Engn, Storrs, CT 06269 USA; [Law, Chung K.] Tsinghua Univ, Ctr Combust Energy, Beijing 100084, Peoples R China; [Zhang, Taichang; Qi, Fei] Univ Sci & Technol China, Natl Synchrotron Radiat Lab, Hefei 230029, Anhui, Peoples R China; [Zhang, Taichang] Chinese Acad Sci, Inst Mech, State Key Lab High Temp Gas Dynam, Beijing 100190, Peoples R China
合作状况	国际
中文摘要	A two-dimensional model of a weakly buoyant flow over a horizontal wire with surface reaction was developed, using a literature mechanism, to simulate the heat release rate of the catalytic oxidation of methane (2 vol.% in air) over a Pd wire with a porous 1-2 mu m PdO surface layer, acquired by wire microcalorimetry over the temperature range of 600-770 K. The experimental and simulation results demonstrate that the catalytic oxidation is characterized by a low-temperature, reaction-controlled regime in which the internal pore surface is totally accessible to the reactions, and a high-temperature regime in which finite-rate pore diffusion also affects the overall heat release rate. Furthermore, the controlling reactions are identified to be the oxidative adsorption of methane, desorption of oxygen, and adsorption of oxygen, with the former two being facilitating and the last retarding. The reaction mechanism was modified using the response surface methodology and the experimental data in the low-temperature reaction-controlled regime, yielding satisfactory prediction of the global activation energy and identification of the role of oxygen coverage in the transition of the global activation energy.
学科主题	流体力学
分类号	一类
收录类别	SCI ; EI
资助信息	Air Force Office of Scientific Research
原文出处	http://dx.doi.org/10.1016/j.combustflame.2012.09.004
语种	英语
WOS记录号	WOS:000311771500015
公开日期	2013-03-07
内容类型	期刊论文
源URL	[http://dspace.imech.ac.cn/handle/311007/47017]
专题	力学研究所_高温气体动力学国家重点实验室
推荐引用方式 GB/T 7714	Zhang TC,Xin YX,Ren ZY,et al. Catalytic oxidation of methane over PdO in wire microcalorimetry[J]. COMBUSTION AND FLAME,2013,160(1):149-154.
APA	Zhang TC,Xin YX,Ren ZY,Qi F,&Law CK.(2013).Catalytic oxidation of methane over PdO in wire microcalorimetry.COMBUSTION AND FLAME,160(1),149-154.
MLA	Zhang TC,et al."Catalytic oxidation of methane over PdO in wire microcalorimetry".COMBUSTION AND FLAME 160.1(2013):149-154.