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题名: Ammonia synthesis over Ru/C catalysts with different carbon supports promoted by barium and potassium compounds
作者: Liang, CH;  Wei, ZB;  Xin, Q;  Li, C
关键词: ammonia synthesis ;  Ru catalysts ;  carbon supports ;  promoters
刊名: APPLIED CATALYSIS A-GENERAL
发表日期: 2001-02-14
卷: 208, 期:1-2, 页:193-201
收录类别: SCI
文章类型: Article
部门归属: 5
项目归属: 503
WOS标题词: Science & Technology ;  Physical Sciences ;  Life Sciences & Biomedicine
类目[WOS]: Chemistry, Physical ;  Environmental Sciences
研究领域[WOS]: Chemistry ;  Environmental Sciences & Ecology
英文摘要: Ammonia synthesis over ruthenium catalysts supported on different carbon materials using Ba or K compounds as promoters has been investigated. Ba(NO3)(2), KOH, and KNO3 are used as the promoter or promoter precursor, and activated carbon (AC), activated carbon fiber (ACF). and carbon molecular sieve (CMS) are used as the support. The activity measurement for ammonia synthesis was carried out in a flow micro-reactor under mild conditions: 350-450 degreesC and 3.0 MPa. Results show that KOH promoter was more effective than KNO3. and that Ba(NO3)(2) was the most effective promoter among the three. The roles of promoters can be divided into the electronic modification of ruthenium, the neutralization of surface functional groups on the carbon support and the ruthenium precursor. The catalyst with AC as the support gave the highest ammonia concentration in the effluent among the supports used, while the catalyst with ACF as the support showed the highest turnover-frequency (TOF) value. It seems that the larger particles of Ru on the carbon supports are more active for ammonia synthesis in terms of TOF value. (C) 2001 Elsevier Science B.V. All rights reserved.
关键词[WOS]: FREE RUTHENIUM CATALYSTS ;  ACTIVE-CARBON ;  HYDROGEN TREATMENT ;  OXIDE PROMOTERS ;  ALKALI-METAL ;  ALUMINA ;  DISPERSION ;  SURFACE
语种: 英语
原文出处: 查看原文
WOS记录号: WOS:000166968700019
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/85459
Appears in Collections:中国科学院大连化学物理研究所_期刊论文

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作者单位: 1.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Peoples R China

Recommended Citation:
Liang, CH,Wei, ZB,Xin, Q,et al. Ammonia synthesis over Ru/C catalysts with different carbon supports promoted by barium and potassium compounds[J]. APPLIED CATALYSIS A-GENERAL,2001,208(1-2):193-201.
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