In this work,Fe/Ru-catalyst supported on hyper-crosslinked polystyrene(HPS)synthesized via hydrothermal deposition was proposed for the FischerTropsch synthesis(FTS)to obtain a high yield of gasolineranged hydrocarbon...In this work,Fe/Ru-catalyst supported on hyper-crosslinked polystyrene(HPS)synthesized via hydrothermal deposition was proposed for the FischerTropsch synthesis(FTS)to obtain a high yield of gasolineranged hydrocarbons.According to the characterization results,the obtained monometallic 2%Fe-HPS catalyst contains Fe_(3)O_(4)particles with a multimodal distribution(mean particle size of 11,30,and 45 nm).The addition of Ru leads to a decrease in the particle size with a narrower distribution(ca.5 nm).Ru was shown to serve as a nucleating agent for Fe_(3)O_(4)crystalline since it has a higher affinity to the HPS surface and strongly anchors to the benzene rings of the polymer.This prevents a leaching of the active phase from the support increasing the catalyst stability.Ru addition also brings supplemental sites for CO and H_(2) chemisorption resulting in 1.5-fold increased activity in FTS reaction compared to monometallic 2%FeHPS composite.2%Fe-1%Ru-HPS composite showed~20%higher selectivity toward the formation of C_(5)-C_(11) alkanes at about 30%conversion of CO in comparison with monometallic one.Moreover,the branched hydrocarbons with a selectivity of approximately 17.5 mol%were observed in the FTS products in the presence of a 2%Fe-1%Ru-HPS catalyst.展开更多
基金funded by the Russian Science Foundation(Grant No.23-23-00653).
文摘In this work,Fe/Ru-catalyst supported on hyper-crosslinked polystyrene(HPS)synthesized via hydrothermal deposition was proposed for the FischerTropsch synthesis(FTS)to obtain a high yield of gasolineranged hydrocarbons.According to the characterization results,the obtained monometallic 2%Fe-HPS catalyst contains Fe_(3)O_(4)particles with a multimodal distribution(mean particle size of 11,30,and 45 nm).The addition of Ru leads to a decrease in the particle size with a narrower distribution(ca.5 nm).Ru was shown to serve as a nucleating agent for Fe_(3)O_(4)crystalline since it has a higher affinity to the HPS surface and strongly anchors to the benzene rings of the polymer.This prevents a leaching of the active phase from the support increasing the catalyst stability.Ru addition also brings supplemental sites for CO and H_(2) chemisorption resulting in 1.5-fold increased activity in FTS reaction compared to monometallic 2%FeHPS composite.2%Fe-1%Ru-HPS composite showed~20%higher selectivity toward the formation of C_(5)-C_(11) alkanes at about 30%conversion of CO in comparison with monometallic one.Moreover,the branched hydrocarbons with a selectivity of approximately 17.5 mol%were observed in the FTS products in the presence of a 2%Fe-1%Ru-HPS catalyst.
