Highly selective hydrogenation of CO2 to C5+ hydrocarbons over Fe catalysts copromoted by K with Pd
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING(2022)
摘要
CO2 hydrogenation to liquid fuels is significant to reduce CO2 emissions and replace fossil fuels. Herein, we reported that Fe catalysts promoted by combination of K and Pd showed a three-synergistic catalytic effect to high selectivity of C5+ hydrocarbons in CO2 hydrogenation reaction. The catalysts were prepared using an impregnation method and characterized with physical adsorption, XRD, XPS, HRTEM, H-2-TPR, H-2-TPD and CO2- TPD. The results indicated that K0.016Pd0.12Fe catalysts showed K-overlapped PdFe-like alloy structure which enhanced H-2 activation behaviors and moderately chemisorption of CO2. K addition promoted Fe to activate carbide species while active H originated from H-2 pool generated by PdFe alloy spilled to Fe species surface, consequently boosting not only conversion of CO2 to 41.8% but also selectivity of C5+ hydrocarbon to 70.6%. The maximum yield of long-chain C5+ hydrocarbon reached up to 20.0% under high space velocity 6000 mL g(cat)( -1) h(-1). These results provide a new insight to develop highly selective Fe based catalysts for long-chain hydro-carbons via CO2 hydrogenation.
更多查看译文
关键词
CO2 hydrogenation, Long-chain hydrocarbon, Fe catalysts, K promoters, Pd catalysts
AI 理解论文
溯源树
样例
![](https://originalfileserver.aminer.cn/sys/aminer/pubs/mrt_preview.jpeg)
生成溯源树,研究论文发展脉络
Chat Paper
正在生成论文摘要