Ammonia synthesis on graphitic-nanofilament supported Ru catalysts

	Ammonia synthesis on graphitic-nanofilament supported Ru catalysts
	Li, ZL; Liang, CH; Feng, ZC; Feng, ZC; Ying, PL; Wang, DZ; Li, C
刊名	journal of molecular catalysis a-chemical
	2004-03-15
卷号	211 期号:1-2 页码:103-109
关键词	ammonia synthesis graphitic-nanofilaments Ru promoter kinetics
产权排序	1;1
英文摘要	graphitic-nanofilaments (gnfs) supported ruthenium catalysts were prepared and characterized by nz physisorption, x-ray diffraction (xrd), transmission electron microscope (tem) and temperature programmed reduction-mass spectroscopy (tpr-ms) and used for ammonia synthesis in a fixed bed microreactor. the tems of the ru/gnfs and ru-ba/gnfs catalysts indicate that the ru particles are in the range of 2-4 nm, which is the optimum size of ru particles for the maximum number of b5 type sites. the activity of ru-ba/gnfs catalysts is higher than that of ru-ba/ac by about 25%. the methanation reaction on the ru/gnfs catalyst is remarkably inhibited compared with a ru/ac catalyst. high graphitization of gnfs is likely to be the reason for the high resistance to the methanation reaction. the power rate law for ammonia synthesis on ru-ba/gnfs catalysts can be expressed by r = kp(nh3)(-0.4) p-n2(0.8) p-h2(-0.7), indicating that h-2 is an inhibitor for n-2 activation on the catalyst. catalysts with the promoters ba, k and cs show large differences in activity for ammonia synthesis. the catalyst promoted with ba (ba/ru = 0.2 molar ratio) was found to be the most active, whereas that with a k promoter was the least active. (c) 2003 elsevier b.v. all rights reserved.
WOS标题词	science & technology ; physical sciences
类目[WOS]	chemistry, physical
研究领域[WOS]	chemistry
关键词[WOS]	ruthenium catalysts ; carbon nanotubes ; active-carbon ; nh3 synthesis ; barium ; kinetics ; adsorption ; promoter ; cesium ; growth
收录类别	SCI
原文出处	true
语种	英语
WOS记录号	WOS:000188928600015
公开日期	2010-11-30
内容类型	期刊论文
源URL	[http://159.226.238.44/handle/321008/83411]
专题	大连化学物理研究所_中国科学院大连化学物理研究所
作者单位	Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Peoples R China
推荐引用方式 GB/T 7714	Li, ZL,Liang, CH,Feng, ZC,et al. Ammonia synthesis on graphitic-nanofilament supported Ru catalysts[J]. journal of molecular catalysis a-chemical,2004,211(1-2):103-109.
APA	Li, ZL.,Liang, CH.,Feng, ZC.,Feng, ZC.,Ying, PL.,...&Li, C.(2004).Ammonia synthesis on graphitic-nanofilament supported Ru catalysts.journal of molecular catalysis a-chemical,211(1-2),103-109.
MLA	Li, ZL,et al."Ammonia synthesis on graphitic-nanofilament supported Ru catalysts".journal of molecular catalysis a-chemical 211.1-2(2004):103-109.