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题名: Coupling catalytic hydrolysis and oxidation for CS(2) removal
作者: Wang Li1;  Wu Diyong1;  Wang Shudong1;  Yuan Quan1
关键词: carbon disulfide ;  coupling process ;  low-temperature removal
刊名: JOURNAL OF ENVIRONMENTAL SCIENCES-CHINA
发表日期: 2008
卷: 20, 期:4, 页:436-440
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Life Sciences & Biomedicine
类目[WOS]: Environmental Sciences
研究领域[WOS]: Environmental Sciences & Ecology
英文摘要: CS(2) removal was obtained by coupling catalytic hyidation on bi-functional catalyst. On the hydrolysis active Sites, CS(2) is hydrolyzed to H(2)S, while on the oxidation active sites, H(2)S is oxidized to elemental S or sulfuric acid deposited on the porous support. The above can be expressed as follows: CS(2) (H(2)O) under right arrow COS (H(2)O) under right arrow H(2)S (O(2)) under right arrow S/SO(4)(2-). H(2)S oxidation eliminates its prohibition on CS(2) hydrolysis so that the rate of coupling removal CS(2) is 5 times higher than that Of CS(2) hydrolysis. The same active energy of hydrolysis and coupling reaction also indicates that H(2)S oxidation does not change the reaction mechanism Of CS2 hydrolysis. Temperature has obvious effect on the process while the mole ratio Of O(2) concentration to CS(2) concentration (O/S) does not, especially in excess of 2.5. The formation of sulfuric acid on the catalyst surface poisons hydrolysis active sites and causes the decrease of left OH(-1) concentration on the catalysts surface. Lower temperature is suggested for this bi-functional catalyst owing to the low yield ratio Of S/SO(4)(2-).
关键词[WOS]: LOW-TEMPERATURE HYDROLYSIS ;  CARBON-DISULFIDE ;  HYDROGEN-SULFIDE ;  ALUMINA CATALYSTS ;  ACTIVATED CARBONS ;  SULFUR
语种: 英语
WOS记录号: WOS:000254963300009
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/140981
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 160023, Peoples R China

Recommended Citation:
Wang Li,Wu Diyong,Wang Shudong,et al. Coupling catalytic hydrolysis and oxidation for CS(2) removal[J]. JOURNAL OF ENVIRONMENTAL SCIENCES-CHINA,2008,20(4):436-440.
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