催化作用
甲醇
选择性
尖晶石
铜
X射线光电子能谱
化学
无机化学
氧气
吸附
核化学
材料科学
化学工程
冶金
有机化学
工程类
作者
Shiwei Wang,Jinhai Yang,Shiqiang Wang,Ning Zhao,Fang Xiao
标识
DOI:10.1016/j.fuproc.2023.107789
摘要
CO2 hydrogenation to methanol is an important technology for carbon utilization which not only provides a solution to the greenhouse gas mitigation but also produces value-added products. Copper-based catalyst has always been the research focus of the process. Cu1.5Mn1.5O4 spinel has become an interesting alternative because it contains more oxygen defects and highly dispersed copper species that promote the CO2 adsorption and conversion. In this paper, the effects of Cu and Zn on the performance of Cu-Mn-Zn/ZrO2 catalysts for hydrogenation of CO2 to methanol were studied. It was found that after Zn modification, the catalytic performance of the catalyst was greatly improved. Among all catalysts, Cu3MnZn0.5Zr0.5 has the best CO2 conversion (7.14%) and methanol selectivity (69.74%) at 260 °C and 5 MPa. XPS analysis showed that doped Zn replaced the position of Cu in Cu1.5Mn1.5O4 spinel, forming the ZnOx and then increasing the content of oxygen defects, which resulted in the higher methanol selectivity. The increased Cu content promoted the activation of H2 and the rate of *CO3 hydrogenation to *HCOO, which in turn increases the conversion of CO2.
科研通智能强力驱动
Strongly Powered by AbleSci AI