Effects of preparation method on CeCu oxide catalyst performance
发布时间：2024-10-10
点击次数：
- 影响因子：
- 3.9
- DOI码：
- 10.1039/C4RA05431H
- 所属单位：
- 重庆工商大学
- 教研室：
- 化学工程系
- 发表刊物：
- RSC advances
- 项目来源：
- 重庆市教育委员会，重庆市科技局
- 关键字：
- CeCu composite catalysts; catalytic oxidation; Toluene
- 摘要：
- CeCu-HT, CeCu-PC, and CeCu-CA composite oxide catalysts were synthesized using hard-template, coprecipitation, and complex methods, respectively, and characterized by XRD, TEM, BET, XPS, and H2-TPR. Catalytic properties were investigated through the catalytic combustion of phenyl volatile organic compounds in air. XRD results show that the prepared CeCu oxide catalysts all had CeCu oxide solid solution phases but distinct crystallinities and phase components. Low-angle XRD, TEM, and BET results demonstrate that CeCu-HT had a developed and ordered bicontinuous mesoporous structure, as well as a large specific surface area of 206 m2 g−1. CeCu-PC and CeCu-CA formed low-porosity, agglomerated structures with specific surface areas of 15 and 24 m2 g−1, respectively. XPS results confirm that the main chemical valance of the Ce and Cu species in the prepared CeCu catalysts is +4 and +2, respectively. And on combination with H2-TPR, CeCu-HT had more active oxygen species and higher reducibility compared with CeCu-PC and CeCu-CA. CeCu-HT had higher phenyl VOC catalytic combustion activity in air than CeCu-PC and CeCu-CA, and follows the following activity order: ethylbenzene > toluene > xylene > benzene. The prepared catalysts had low benzene catalytic combustion activities, with conversion below 70% in the studied temperature range. Lifetime test results show that the catalysts had high stabilities for ethylbenzene catalytic combustion because of their efficient activation of oxygen molecules from air to form active oxygen species at the corresponding temperature. The clear differences between the phenyl VOC catalytic combustion performances of the three CeCu oxide catalysts can be attributed to their distinct chemical components and structures, as well as to the physicochemical properties of phenyl VOC molecules.
- 第一作者：
- 周桂林
- 合写作者：
- 兰海,谢红梅
- 论文类型：
- 源刊论文
- 通讯作者：
- 周桂林
- 论文编号：
- OSHOCCKD2OIQNQ9E0LHBJPDPZ7ZLA0MT
- 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：
- 4
- 是否译文：
- 否
- 发表时间：
- 2014-10-01