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题名: Different Carriers-Supported Rh-Based Catalysts for Oxidative Bromination of Methane
作者: Lin Ronghe1, 3;  Ding Yunjie1, 2;  Gong Leifeng1, 3;  Li Jingwei1, 3;  Chen Weimiao1;  Yan Li1;  Lue Yuan1
关键词: methane ;  oxidative bromination ;  rhodium ;  support ;  supported catalyst
刊名: CHINESE JOURNAL OF CATALYSIS
发表日期: 2010-02-01
DOI: 10.3724/SP.J.1088.2010.90822
卷: 31, 期:2, 页:213-217
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Physical Sciences ;  Technology
类目[WOS]: Chemistry, Applied ;  Chemistry, Physical ;  Engineering, Chemical
研究领域[WOS]: Chemistry ;  Engineering
英文摘要: Oxidative bromination of methane over Rh-based catalysts supported on different carriers was studied using a conventional fixed-bed reactor at atmosphere pressure. It was found that inert supports such as SiC and SiO(2) were in favor of the selectivity for bromomethanes, whereas deep oxidation occurred over ZrO(2) and TiO(2) oxides. H(2)-temperature-programmed reduction experiments confirmed that inert carrier-supported Rh catalysts were more difficult to be reduced than the metal oxide-supported Rh catalysts. Thermodynamic analysis revealed that the steam reforming of bromomethanes was promoted at higher reaction temperatures. It was concluded that the superior performance of the inert carrier-supported catalysts could be ascribed to the medium redox ability, which suppressed the steam reforming reaction. Among the catalysts studied, Rh/SiC showed the highest methane conversion and selectivity for bromomethanes, and therefore the key parameters of catalyst preparation and reaction conditions were optimized on this catalyst. About 20% methane conversion and 90% total selectivity for bromomethanes were achieved on a single pass at 620 degrees C with the gas hourly space velocity and liquid hourly space Velocity of 900 and 3.0 ml/(g.h), respectively. No deactivation happened during 100 h time-on-stream.
关键词[WOS]: HIGHER HYDROCARBONS ;  INTEGRATED PROCESS ;  ACETIC-ACID ;  CONVERSION ;  CONDENSATION ;  HYDROLYSIS
语种: 英语
WOS记录号: WOS:000275568000014
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/141830
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, Dalian Natl Lab Clean Energy, Dalian 116023, Liaoning, Peoples R China
2.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Liaoning, Peoples R China
3.Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China

Recommended Citation:
Lin Ronghe,Ding Yunjie,Gong Leifeng,et al. Different Carriers-Supported Rh-Based Catalysts for Oxidative Bromination of Methane[J]. CHINESE JOURNAL OF CATALYSIS,2010,31(2):213-217.
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