CO2 hydrogenation to methane over Co/KIT-6 catalyst: Effect of reduction temperature
发布时间：2024-12-01
点击次数：
- 影响因子：
- 13.273
- DOI码：
- 10.1016/j.cej.2018.06.087
- 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：
- Chemical Engineering Journal
- 项目来源：
- 重庆工商大学
- 关键字：
- Mesoporous Co/KIT-6 catalyst；Carbon dioxide；Catalytic hydrogenation；Reduction temperature
- 摘要：
- The mesoporous Co/KIT-6 catalysts with 10 wt% Co loading were prepared at different reduction temperatures. The physicochemical properties of the Co/KIT-6 catalysts were characterized by TEM, BET, XRD, XPS, and CO2-TPD, and the effect of reduction temperature on CO2 hydrogenation catalytic performance of Co/KIT-6 catalysts was studied. The results show that reduction temperature has a significant impact on the specific surface area, crystallinity and content of Co0 species, and CO2 adsorption performance of the prepared Co/KIT-6 catalysts. The low reduction temperature is not conduct to the reduction of CoOx, while the high reduction temperature lead to the increase of Co0 species crystallinity and the formation of Co2SiO4 and/or CosbndOsbndSi species which are unfavorable to the form Co0 species. The RT400 catalyst exhibits the highest Co0 species content and the best CO2 adsorption performance. Both the CO2 hydrogenation catalytic activity and CH4 selectivity of the Co/KIT-6 catalysts follow the order: RT400 > RT350 > RT450 > RT500 > RT550, with a small amount of by-product CO. At the reaction temperature of 340 °C, the CO2 reaction rate (CO2 conversion) of the RT400 catalyst can reach 2.98 × 10−5 mol/gcat/s (40%), the CH4 and CO selectivity are 86.7% and 13.3%, respectively.
- 第一作者：
- Huiran Liu
- 合写作者：
- Shiyu Xu,Guochuan Huang,Shuyan Huang,Kun Xiong
- 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：
- 351
- 页面范围：
- 65–73
- 是否译文：
- 否
- 发表时间：
- 2018-06-14
- 收录刊物：
- SCI