| 초록 |
Potassium promoted Fe/CNT catalyst synthesized by simple incipient wetness impregnation method. The effect of potassium on the physico-chemical properties and catalytic performance for CO2 hydrogenation of the catalysts were investigated. Potassium slightly hinder the reduction of iron metal and reduce the surface area of iron catalysts. But, it dynamically changing the surface property of catalysts. It enhance the surface basicity, which can enhance the absorption of carbon dioxide and improve the activation of CO for carburization of iron metal to iron carbide(Fe5C2) phase. Compared with bare Fe/CNT with potassium promoted one, potassium promoted one have highly improve for production of light olefins and C5+ product. Spent-catalyst also analyzed by TEM and XRD it show Fe5C2 phase are well synthesized, which is well known active site for iron based CO2 hydrogenation. |
