H2S selective catalytic oxidation over Ce substituted La1-xCexFeO3 perovskite oxides catalyst
文献类型：期刊论文
| 作者 | Hao, Zhengping; Li, Na ; Jiang, Guoxia; Zhang, Xin; Zhang, Fenglian; Qu, Siqiu
|
| 刊名 | CHEMICAL ENGINEERING JOURNAL
 |
| 出版日期 | 2018-09-15 |
| 卷号 | 348页码:831-839 |
| 关键词 | Perovskite oxide Ce-Fe solid solution Synergetic effect Catalytic mechanism H2S selective oxidation |
| ISSN号 | 1385-8947 |
| 文献子类 | Article |
| 英文摘要 | A series of La1-xCexFeO3 perovskite catalysts were synthesized using a citrate sol-gel method and examined for H2S selective catalytic oxidation reaction. It was demonstrated that the catalysts exhibited prominent catalytic activity, outstanding sulfur selectivity (nearly 100%) and particularly low apparent activation energy. Remarkably, it can proceed consecutively for 70 h without notable deactivation. Moreover, Ce and Fe were mainly existed in the form of LaCeFeO3 perovskite-type oxides as well as Ce-Fe solid solution. Significantly, catalysts reducibility was improved greatly due to the strongly Ce-Fe synergetic effect. More importantly, a proper substitution of Ce can enhance surface basic properties and facilitate the formation of oxygen vacancies on the catalyst surface, and hence improve H2S adsorbability and lattice oxygen mobility, respectively. It co-operating with the improved reducibility jointly contributed to the excellent catalytic performance. Furthermore, the reaction obeyed a redox mechanism and the catalyst deactivation was due mainly to the formation of sulfate species. Additionally, the added water can lead to the establishment of the reverse Claus reaction, causing the decrease of catalytic performance. |
| 源URL | [http://ir.rcees.ac.cn/handle/311016/41091]  |
| 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 | Hao, Zhengping,Li, Na,Jiang, Guoxia,et al. H2S selective catalytic oxidation over Ce substituted La1-xCexFeO3 perovskite oxides catalyst[J]. CHEMICAL ENGINEERING JOURNAL,2018,348:831-839. |
| APA | Hao, Zhengping,Li, Na,Jiang, Guoxia,Zhang, Xin,Zhang, Fenglian,&Qu, Siqiu.(2018).H2S selective catalytic oxidation over Ce substituted La1-xCexFeO3 perovskite oxides catalyst.CHEMICAL ENGINEERING JOURNAL,348,831-839. |
| MLA | Hao, Zhengping,et al."H2S selective catalytic oxidation over Ce substituted La1-xCexFeO3 perovskite oxides catalyst".CHEMICAL ENGINEERING JOURNAL 348(2018):831-839. |
入库方式： OAI收割
来源：生态环境研究中心
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。