Catalytic combustion of PVOCs on MnOx catalysts
发布时间：2024-10-10
点击次数：
- 影响因子：
- 5.008
- DOI码：
- 10.1016/j.molcata.2014.06.028
- 所属单位：
- 重庆工商大学
- 教研室：
- 化学工程系
- 发表刊物：
- journal of molecular catalysis a-chemical
- 项目来源：
- 催化基础国家重点实验室
- 关键字：
- Manganese oxide catalyst；Ordered mesoporous structure；Catalytic combustion；PVOCs
- 摘要：
- In this study, manganese oxide (MnOx) catalysts were prepared by using hard-template (MnOx-HT) and precipitation (MnOx-PC) methods. The prepared MnOx catalysts were systematically characterized by XRD, TEM, BET, XPS, O2-TPD, and H2-TPR analyses. The activity of the catalysts was investigated in the catalytic combustion of PVOCs, such as benzene, toluene, xylene, and ethylbenzene, in air. Results indicate that the chemical composition and structure of the prepared MnOx oxide catalysts are obviously affected by the preparation methods. The T90 corresponding to the catalytic combustion of xylene, ethylbenzene, toluene, and the T60 of benzene over the MnOx-HT catalyst are 200 °C, 205 °C, 210 °C, and 225 °C, which are much lower than that over MnOx-PC. The catalytic combustion of the PVOCs over the MnOx-HT catalyst follows the order xylene > ethylbenzene > toluene > benzene. Both the MnOx-HT and MnOx-PC catalysts exhibit stable catalytic performance during the combustion of toluene. Therefore, the superior catalytic performance of the MnOx-HT catalyst can be attributed to the high MnO2 content, high concentration of surface reactive oxygen, highly ordered mesopores, large specific surface area, good oxygen mobility, and low-temperature reducibility. In addition, the catalytic combustion of the phenyl compounds is affected by their inherent characteristics such as structural stability, molecular polarity, and dimensions.
- 第一作者：
- 周桂林
- 合写作者：
- 兰海,王慧,谢红梅,张桂芝,郑旭煦
- 论文类型：
- 源刊论文
- 通讯作者：
- 周桂林
- 论文编号：
- 29FDHGRRWAVYB9RG1R51W6T9QHE8VEME
- 学科门类：
- 工学
- 一级学科：
- 化学工程与技术
- 文献类型：
- Journal Article
- 期号：
- 393
- 页面范围：
- 279–288
- 是否译文：
- 否
- 发表时间：
- 2014-11-01