Effect of Fe-Co Molar Ratios on Efficient CO₂ Hydrogenation to Light Olefins
Faculty Mentor
Cheng Zheng
Area of Research
Chemistry
Major
Biology
Description
The increasing concentration of greenhouse gases, particularly carbon dioxide (CO₂), is a major contributor to global warming and climate change. To address this issue, significant efforts have been made to catalytically convert CO₂ via hydrogenation. In this study, a series of Fe-Co organometallic complexes with varying Fe/Co molar ratios (5:1, 3:1, 2:1, 1:1, 1:2, 1:3, 1:5) were synthesized using solvent evaporation. The resulting samples underwent mild thermal treatment, yielding highly magnetic bimetallic catalysts. The catalysts were compressed to a uniform particle size and loaded into quartz tubes for evaluation. CO₂ hydrogenation was conducted in a flow bed reactor under controlled temperature and CO₂/H₂ flow conditions, with reaction products analyzed via online gas chromatography (GC). The results demonstrated that the Fe-Co catalyst with a 1:1 molar ratio exhibited the highest selectivity and conversion efficiency for CO₂ hydrogenation to light olefins. These novel magnetic bimetallic catalysts provide valuable insights into the role of Fe₃O₄ and Co₃O₄ in the reaction pathway for CO₂ hydrogenation to light olefins.
Effect of Fe-Co Molar Ratios on Efficient CO₂ Hydrogenation to Light Olefins
The increasing concentration of greenhouse gases, particularly carbon dioxide (CO₂), is a major contributor to global warming and climate change. To address this issue, significant efforts have been made to catalytically convert CO₂ via hydrogenation. In this study, a series of Fe-Co organometallic complexes with varying Fe/Co molar ratios (5:1, 3:1, 2:1, 1:1, 1:2, 1:3, 1:5) were synthesized using solvent evaporation. The resulting samples underwent mild thermal treatment, yielding highly magnetic bimetallic catalysts. The catalysts were compressed to a uniform particle size and loaded into quartz tubes for evaluation. CO₂ hydrogenation was conducted in a flow bed reactor under controlled temperature and CO₂/H₂ flow conditions, with reaction products analyzed via online gas chromatography (GC). The results demonstrated that the Fe-Co catalyst with a 1:1 molar ratio exhibited the highest selectivity and conversion efficiency for CO₂ hydrogenation to light olefins. These novel magnetic bimetallic catalysts provide valuable insights into the role of Fe₃O₄ and Co₃O₄ in the reaction pathway for CO₂ hydrogenation to light olefins.