Molecules | |
Carbon Dioxide Reduction with Hydrogen on Fe, Co Supported Alumina and Carbon Catalysts under Supercritical Conditions | |
AlexanderL. Kustov1  ViktorI. Bogdan1  AlekseyE. Koklin1  LeonidM. Kustov1  YanaA. Pokusaeva1  TatianaV. Bogdan1  | |
[1] N.D. Zelinsky Institute of Organic Chemistry, Leninsky Prospect, 47, 119991 Moscow, Russia; | |
关键词: carbon dioxide; carbon monoxide; methane; supercritical CO2; iron nanoparticles; cobalt nanoparticles; | |
DOI : 10.3390/molecules26102883 | |
来源: DOAJ |
【 摘 要 】
Reduction of CO2 with hydrogen into CO was studied for the first time on alumina-supported Co and Fe catalysts under supercritical conditions with the goal to produce either CO or CH4 as the target products. The extremely high selectivity towards methanation close to 100% was found for the Co/Al2O3 catalyst, whereas the Fe/Al2O3 system demonstrates a predominance of hydrogenation to CO with noticeable formation of ethane (up to 15%). The space–time yield can be increased by an order of magnitude by using the supercritical conditions as compared to the gas-phase reactions. Differences in the crystallographic phase features of Fe-containing catalysts cause the reverse water gas shift reaction to form carbon monoxide, whereas the reduced iron phases initiate the Fischer–Tropsch reaction to produce a mixture of hydrocarbons. Direct methanation occurs selectively on Co catalysts. No methanol formation was observed on the studied Fe- and Co-containing catalysts.
【 授权许可】
Unknown