Impact Factor:

5.6

DOI number:

10.1016/j.joei.2024.101856

Affiliation of Author(s):

环境与资源学院

Teaching and Research Group:

化学工程系

Journal:

Journal of the Energy Institute

Funded by:

重庆市自然科学基金面上项目

Key Words:

CoCe composite catalyst; Pore structure; Active Co0 species; Synergistic effects; CO2 catalytic hydrogenation

Abstract:

In order to realize the dual carbon goals of “carbon peaking” and “carbon neutrality”, the design and development CO2 hydrogenation catalyst with high performances is of great significance. In this study, the CoCe composite catalysts were prepared by different methods and used to CO2 catalytic hydrogenation. The physicochemical properties of the prepared catalysts were characterized by XRD, BET, TEM/HRTEM, and H2-TPD. The characterization results indicated that the studied CoCe composite catalysts with different pore structure can be prepared by different preparation methods. The suitable preparation method can promote Co species to be dissolved into the CeO2 lattice to form Ce-O-Co solid solution, which can promote the corresponding Co species to be reduced by H2 to form active Co0 species. The large specific surface area and developed ordered mesoporous structure of the CoCe-HT catalyst precursor, which was prepared by hard-template method, are conducive to the formation of active Co0 species and activation of H2 to produce reactive H species. The CO2 hydrogenation activity of the studied CoCe composite catalysts follows the following order: CoCe-HT > CoCe-CP > CoCe-CA > CoCe-HY. The CoCe-HT catalyst showed high CO2 hydrogenation conversion of 53.9% and good using stability at 360 °C for 600 min. However, the CoCe-CA prepared by complex method has a poor use stability.

First Author:

Guilin Zhou

Co-author:

Liying Xie,Fengqiong Xie,Shuang Chen,Jia Zeng,Hongmei Xie

Indexed by:

源刊论文

Discipline:

Engineering

Document Type:

Journal Article

Volume:

117

Page Number:

101856

Translation or Not:

no

Date of Publication:

2024-11-19

Included Journals:

SCI