钴改性Fe3O4-MnO2催化转化生物质合成气制备液体燃料

本文制备了用于费托合成反应的钴改性Fe₃O₄-MnO₂双功能催化剂，并探究了钴负载量对Fe-Co协同效应的影响以及Fe₁Co_xMn₁催化剂的费托合成反应性能. 实验发现，在Fe₃O₄-Mn催化剂中加入Co可促进铁氧化物的还原、增加反应过程中铁位点的活性. 此外，Co的加入可增强Fe-Co金属间的电子转移，加强两者的协同作用，提高催化性能. Co负载较高的Fe₁Co_xMn₁催化剂可进一步促进加氢反应能力，使产品分布向短链烃方向转移. 在280 ^°C、2.0 MPa和3000 h^-1的最佳工况条件下，Fe₁Co₁Mn₁催化剂的液体燃料收率最高.

Bio-syngas Converting to Liquid Fuels over Co Modified Fe3O4-MnO2 Catalysts

A bifunctional Co modified Fe₃O₄-Mn catalyst was prepared for Fischer-Tropsch synthesis (FTS). The influence of Co loading on the synergistic effect of Fe-Co as well as FTS performance over Fe₁Co_xMn₁ catalysts was studied. Incorporation of Co species into the Fe₃O₄-Mn catalyst promoted the reduction of iron oxides, increasing iron active sites during FTS. Moreover, the adding of Co species enhanced the electron transfer from Fe to Co metal, which strengthened the synergistic effect of Fe-Co, improving the catalytic performance. The Fe₁Co_xMn₁ catalyst with higher Co loading promoted further the hydrogenation ability, favoring the shifting of the product distribution towards shorter hydrocarbons. Under optimized conditions of 280 °C, 2.0 MPa and 3000 h^-1, the highest yield of liquid fuels was obtained for the Fe₁Co₁Mn₁ catalyst.