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Ammonia synthesis on graphitic-nanofilament supported Ru catalysts
Li, ZL; Liang, CH; Feng, ZC; Feng, ZC; Ying, PL; Wang, DZ; Li, C
关键词Ammonia Synthesis Graphitic-nanofilaments Ru Promoter Kinetics
刊名JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL
2004-03-15
DOI10.1016/j.molcata.2003.09.028
211期:1-2页:103-109
收录类别SCI
文章类型Article
项目归属503
产权排名1;1
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
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.
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WOS记录号WOS:000188928600015
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被引频次:35[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://cas-ir.dicp.ac.cn/handle/321008/83411
专题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
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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.
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