| Institution: | 1. School of Power and Mechanical Engineering, the Institute of Technological Sciences, Wuhan University, 430072 Wuhan, China;2. School of Power and Mechanical Engineering, the Institute of Technological Sciences, Wuhan University, 430072 Wuhan, China
These authors contributed equally to this work.;3. State Key Laboratory for High Efficiency and Low Carbon Utilization of Coal, Institute of Coal Chemistry, Chinese Academy of Sciences, 030001 Taiyuan, China |
| Abstract: | Although considerable efforts towards directly converting syngas to liquid fuels through Fischer–Tropsch synthesis have been made, developing catalysts with low CO2 selectivity for the synthesis of high-quality gasoline remains a big challenge. Herein, we designed a bifunctional catalyst composed of hydrophobic FeNa@Si-c and HZSM-5 zeolite, which exhibited a low CO2 selectivity of 14.3 % at 49.8 % CO conversion, with a high selectivity of 62.5 % for gasoline in total products. Molecular dynamic simulations and model experiments revealed that the diffusion of water molecules through hydrophilic catalyst was bidirectional, while the diffusion through hydrophobic catalyst was unidirectional, which were crucial to tune the water-gas shift reaction and control CO2 formation. This work provides a new fundamental understanding about the function of hydrophobic modification of catalysts in syngas conversion. |
