High-efficient oxidation removal of ethanol from air over ordered mesoporous Co3O4/KIT-6 catalyst
发布时间：2024-12-01
点击次数：
- 影响因子：
- 7.968
- DOI码：
- 10.1016/j.jece.2019.103480
- 所属单位：
- 重庆工商大学
- 教研室：
- 材料科学与工程系
- 发表刊物：
- Journal of Environmental Chemical Engineering
- 项目来源：
- 重庆市科技局，重庆工商大学
- 关键字：
- Catalytic oxidation；OVOCs；Ethanol oxidation；Co3O4 oxide catalyst；Ordered mesoporous
- 摘要：
- In this study, cubic Ia3d mesoporous KIT-6 silica was developed as support to prepare Co3O4/KIT-6 catalysts (COKx, x = 10, 15, 20, 25, and 30 wt%) for OVOCs (ethanol as model compound) catalytic oxidation in air. The prepared COKx catalysts were also characterized by XRD (wide-, low-angle), BET, TEM, H2-TPR, and CO2-TPD. The fixed specific surface area and cubic Ia3d mesoporous structure of KIT-6 provided ordered Ia3d mesoporous structure and high specific surface area for COKx catalysts, but the crystal size, dispersion, reducibility, and oxygen storage-mobility properties of Co3O4, which were based on the ordering of Ia3d mesoporous structure with selected proper mass loading of Co3O4 as 25 wt%, decided the higher catalytic performance of COK25 for ethanol complete oxidation than the others. The T50 and T99 of the prepared COKx catalysts for ethanol oxidation in air were in the range of 215–238 °C and 240–270 °C, respectively, and showed positive relationship with the oxygen storage, desorption, and mobility properties (supply efficiency of reactive oxygen species) of COKx catalysts. The ethanol was completely oxidized to CO2 over COKx as the reaction temperature reached T99, otherwise partially oxidized to acetaldehyde at low reaction temperatures. In addition, the COK25 showed desired CO2 selectivity and T50 and T99 were significantly increased after 7 reaction cycles, revealing good catalytic stability, although the T50 and T99 values increase to 230 and 260 °C, respectively. The COK25 catalyst has showed potential application in OVOCs catalytic purification treatment, due to the available industrialized-preparation method and high catalytic performance.
- 第一作者：
- Hongmei Xie,Hai Lan
- 合写作者：
- Xiao Tan,Wei Wang,Libei Yan,Xuecheng Liu
- 论文类型：
- 源刊论文
- 通讯作者：
- Guilin Zhou
- 学科门类：
- 工学
- 文献类型：
- Journal Article
- 卷号：
- 7
- 页面范围：
- 103480
- 是否译文：
- 否
- 发表时间：
- 2019-12-01
- 收录刊物：
- SCI