| 초록 |
Iron-based catalysts with sodium (Na) as a promoter were prepared by the coprecipitation method for the catalytic conversion of carbon dioxide (CO2) to long-chain hydrocarbons (C5+). In this study, we controlled the Na amount over the iron metal oxide (FeMOx) surface to find the optimized Na content to maximize the C5+ selectivity. The residual Na affects the surface basicity of the catalysts that changed surface morhpology. At 4000mL/g,h and H2/CO2= 3 condition Low Na content FeMOx shows 32.0% CO2 conversion and 4.3% C5+ yield. On the other hand, high Na content FeMOx shows 38.1% conversion and 18.7% of C5+ Yield at same condition. We can check the C5+ selectivity is considerably increased with increasing Na amount on the surface. Furthermore, covering Na enhancing the formation of Fe5C2 phase, which helps the chain-growth reaction of intermediates. |
