Insight into the H2S selective catalytic oxidation performance on well-mixed Ce-containing rare earth catalysts derived from MgAlCe layered double hydroxides
文献类型：期刊论文
| 作者 | Zhang, Fenglian; Zhang, Xin ; Hao, Zhengping; Jiang, Guoxia; Yang, Hongling; Qu, Siqiu
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| 刊名 | JOURNAL OF HAZARDOUS MATERIALS
 |
| 出版日期 | 2018-01-15 |
| 卷号 | 342页码:749-757 |
| 关键词 | Layered double hydroxides Rare earth catalysts H2S selective oxidation Water effect Catalytic mechanism |
| ISSN号 | 0304-3894 |
| 文献子类 | Article |
| 英文摘要 | A series of well-mixed Ce-containing MgAlCe rare earth catalysts derived from layered double hydroxides were synthesized and tested for H2S selective catalytic oxidation. Particularly, no chemisorption O-vacancies but intrinsic defect sites were present on catalyst surface. Significantly, the catalysts exhibited excellent catalytic activity, reasonable durability, and outstanding sulfur selectivity (100%) at relatively low temperatures. Furthermore, the catalyst followed a step-wise mechanism, and the catalyst deactivation was due mainly to the slower oxidation rate of Ce3+ to Ce4+ by O-2 as compared to the reduction rate of Ce4+ to Ce3+ by H2S. Particularly, the added water, a Lewis base, can compete with inefficient S-8 catalyst for the occupation of Lewis acid sites and active sites. Meanwhile, it can change the characteristics of catalyst surface, resulting in sulfur existing form transforming from inefficient S-8 catalyst to inactive S3. Thus, lead to a decrease of deposited inefficient S-8 catalyst content. Consequently, decrease the catalytic activity. (C) 2017 Elsevier B.V. All rights reserved. |
| 源URL | [http://ir.rcees.ac.cn/handle/311016/41095]  |
| 专题 | 生态环境研究中心_环境纳米材料实验室 |
| 推荐引用方式 GB/T 7714 | Zhang, Fenglian,Zhang, Xin,Hao, Zhengping,et al. Insight into the H2S selective catalytic oxidation performance on well-mixed Ce-containing rare earth catalysts derived from MgAlCe layered double hydroxides[J]. JOURNAL OF HAZARDOUS MATERIALS,2018,342:749-757. |
| APA | Zhang, Fenglian,Zhang, Xin,Hao, Zhengping,Jiang, Guoxia,Yang, Hongling,&Qu, Siqiu.(2018).Insight into the H2S selective catalytic oxidation performance on well-mixed Ce-containing rare earth catalysts derived from MgAlCe layered double hydroxides.JOURNAL OF HAZARDOUS MATERIALS,342,749-757. |
| MLA | Zhang, Fenglian,et al."Insight into the H2S selective catalytic oxidation performance on well-mixed Ce-containing rare earth catalysts derived from MgAlCe layered double hydroxides".JOURNAL OF HAZARDOUS MATERIALS 342(2018):749-757. |
入库方式： OAI收割
来源：生态环境研究中心
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