|
|||||
|
|
| 硫中毒对Co3O4/CeO2复合氧化物上炭黑催化燃烧的影响 | |
| 引用本文： | 石晓燕,余运波,薛莉,贺泓.硫中毒对Co3O4/CeO2复合氧化物上炭黑催化燃烧的影响[J].催化学报,2014,35(9):1504-1510. |
| 作者姓名： | 石晓燕 余运波 薛莉 贺泓 |
| 作者单位： | a 中国科学院生态环境研究中心, 北京100085; b 山东理工大学化学工程学院, 山东淄博255049 |
| 基金项目： | 国家重点基础研究发展计划（973计划，2010CB732304）；国家环境保护大气复合污染来源与控制重点实验室开放基金（SCAPC201302）. |
| 摘 要： | 采用共沉淀法制备了CeO2，Co3O4和一系列Co3O4/CeO2复合氧化物催化剂，在400 ℃下含SO2的氧化气氛中对催化剂进行了硫中毒处理，通过原位红外光谱、X射线衍射、程序升温脱附和X射线光电子能谱对新鲜和硫中毒的样品进行了表征. 结果表明，所有测试的硫中毒样品上均形成了硫酸盐，CeO2上累积的硫酸盐明显比Co3O4上的多，Co3O4/CeO2复合氧化物在硫中毒过程中形成了硫酸钴和硫酸铈. 对新鲜和硫化样品在NO/O2气氛下进行了催化炭黑燃烧实验，发现Co3O4/CeO2复合氧化物的活性和抗硫性能优于CeO2，但抗硫性能低于Co3O4. |
| 关 键 词： | 炭黑氧化 氧化钴 氧化铈 复合氧化物 硫中毒 |
| 收稿时间： | 2014-02-23 |
Effect of sulfur poisoning on Co3O4/CeO2 composite oxide catalyst for soot combustion |
|
| Xiaoyan Shi,Yunbo Yu,Li Xue,Hong He.Effect of sulfur poisoning on Co3O4/CeO2 composite oxide catalyst for soot combustion[J].Chinese Journal of Catalysis,2014,35(9):1504-1510. | |
| Authors: | Xiaoyan Shi Yunbo Yu Li Xue Hong He |
| Institution: | a Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; b School of Chemical Engineering, Shandong University of Technology, Zibo 255049, Shandong, China |
| Abstract: | CeO2, Co3O4, and a series of Co3O4/CeO2 composite oxides prepared by co-precipitation were exposed to SO2 under an oxidizing environment at 400 ℃. These fresh and SO2-poisoned samples were characterized by in situ diffuse reflectance infrared Fourier transform spectroscopy, X-ray diffraction, temperature-programmed desorption, and X-ray photoelectron spectroscopy. Sulfates were formed on the oxides, with more sulfates on CeO2 than on Co3O4. On the Co3O4/CeO2 composite oxides, both cobalt sulphate and ceria sulfate were formed. Fresh and sulfated samples were tested for soot combustion in a NO/O2 gas flow. The Co3O4/CeO2 composite oxides showed better SO2 tolerance and higher activity than CeO2 but were more easily poisoned by SO2 than Co3O4. |
| Keywords: | Soot oxidation Cobalt oxide Ceria Composite oxide Sulfur poisoning |
| 点击此处可从《催化学报》浏览原始摘要信息 | |
| 点击此处可从《催化学报》下载免费的PDF全文 | |