Nanoarray Cu/SiO2 Catalysts Embedded in Monolithic Channels for the Stable and Efficient Hydrogenation of CO2-Derived Ethylene Carbonate

作者：Zhou, Mingming; Shi, Yifeng; Ma, Kui; Tang, Siyang; Liu, Changjun; Yue, Hairong^*; Liang, Bin

来源：Industrial & Engineering Chemistry Research, 2018, 57(6): 1924-1934.

DOI：10.1021/acs.iecr.7b04478

• DIMETHYL OXALATE
• SELECTIVE HYDROGENATION
• HETEROGENEOUS HYDROGENATION
• CYCLIC CARBONATES
• METHANOL
• CYCLOHEXENE
• PERFORMANCE
• OXIDATION
• BENZENE
• CO2

The unstable copper active sites and diffusion limitations of the current Cu-based catalysts are the key issues for the industrial ethylene carbonate (EC) hydrogenation reaction. Monolithic Cu-based catalysts were synthesized with the Cu/SiO2 nanoarrays embedded in cordierite channels via an in situ hydrothermal process for catalytic EC hydrogenation to methanol (MeOH) and ethylene glycol (EG). The monolithic catalysts exhibited superb activity, with an EC conversion of 99% along with EG and MeOH selectivity of 97% and 50%, respectively. The characterization indicated that the high activities are attributed to the high dispersion of Cu species, appropriate proportion of surface Cu+ and Cu, and negligible influence of inner diffusion, while the high stabilities are ascribed to the regular nanoarray geometric structure and strong interactions between Cu species and SiO2. The Cu/SiO2 nanoarray monolithic catalysts represent a new idea combining the properties of nanocatalysts and engineering of the practical industrial catalysts for EC hydrogenation.

• 出版日期2018-2-14
• 单位四川大学