Hydrogenation of carbon dioxide over alumina supported Fe-K catalysts

被引:124
作者
Choi, PH
Jun, KW
Lee, SJ
Choi, MJ
Lee, KW
机构
[1] Catalysis Research Division, Korea Res. Inst. of Chem. Technology, Yusong, Taejon 305-600
关键词
carbon dioxide hydrogenation; iron-potassium catalyst; hydrocarbons;
D O I
10.1007/BF00807467
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
The hydrogenation of CO2 has been studied over Fe/alumina and Fe-K/alumina catalysts. The addition of potassium increases the chemisorption ability of CO2 but decreases that of Hz. The catalytic activity test at high pressure (20 atm) reveals that remarkably high activity and selectivity toward light olefins and C-2+ hydrocarbons can be achieved with Fe-K/alumina catalysts containing high concentration of K (K/Fe molar ratio = 0.5, 1.0). In the reaction at atmospheric pressure, the highly K-promoted catalysts give much higher CO formation rate than the unpromoted catalyst. It is deduced that the remarkable catalytic properties in the presence of K are attributable to the increase in the ability of CO2 chemisorption and the enhanced activity for CO formation, which is the preceding step of C-2+ hydrocarbon formation.
引用
收藏
页码:115 / 118
页数:4
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