| 초록 |
Among various iron carbide phases, χ-Fe5C2 is considered to be highly active in Fischer-Tropsch synthesis. Fischer-Tropsch synthesis with conventional iron-based catalysts needs to be preceded by pretreatment steps to form iron carbide phases. In this study, iron carbide was directly synthesized by wet-chemical route, which makes the pretreatment steps unnecessary. Also, χ-Fe5C2 nanoparticles were encapsulated in spherical mesoporous. TEM images of core-shell structured χ-Fe5C2@SiO2 catalyst showed that χ-Fe5C2 nanoparticles were surrounded by spherical mesoporous SiO2 without further phase transition and size change. Catalytic performance test was conducted in a fixed bed reactor. The effluent gas from the reactor was analyzed by an online gas chromatography. Fresh and spent catalysts were analyzed by N2-physisorption, X-ray diffraction, and TEM imaging method. |
