CO2 hydrogenation to methane over Co/KIT-6 catalysts: Effect of Co content
发布时间：2024-12-01
点击次数：
- 影响因子：
- 6.609
- DOI码：
- 10.1016/j.fuel.2017.12.112
- 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：
- Fuel
- 项目来源：
- 重庆市教育委员会
- 关键字：
- Co/KIT-6 catalysts；Carbon dioxide；Catalytic hydrogenation；CH4/CO selectivity
- 摘要：
- The ordered mesoporous Co/KIT-6 catalysts with different Co loading (15–30 wt%) were prepared by impregnation method for CO2 hydrogenation. The physicochemical properties of the catalysts were characterized by H2-TPR, XRD, BET, H2-TPD, and CO2-TPD. The results show that the crystal size of Co species increases with the increasing Co content and the dispersion of Co species reveals an opposite trend. The adsorption capacities of H2 and/or CO2 molecules achieve a maximum value at the Co loading of 25 wt%. The CO2 reaction rate and CH4 selectivity are in the following order: Co15 < Co20 < Co30 < Co25. With the increasing of Co loading, the CO2 reaction rate increases from 2.21 × 10−5 mol/gcat/s (CO2 conversion of 29.8%) for the Co15 catalyst to 3.91 × 10−5 mol/gcat/s (CO2 conversion of 52.6%) for the Co25 catalyst, and the CH4 selectivity improves from 67.0% for the Co15 catalyst to 94.5% for the Co25 catalyst at 360 °C, while the other product is CO. The catalytic performance and products distribution of the Co/KIT-6 catalysts for CO2 hydrogenation are sensitive to the crystal size of Co species which can be adjusted by changing the Co content in Co/KIT-6 catalysts.
- 第一作者：
- Huiran Liu
- 合写作者：
- Shiyu Xu,Kun Xiong,Zhaojie Jiao,Song Wang
- 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：
- 217
- 页面范围：
- 570–576
- 是否译文：
- 否
- 发表时间：
- 2018-01-08
- 收录刊物：
- SCI