[2F15-2F19] C1 chemistry

[2F16] Direct synthesis of gasoline-ranged olefins from syngas over a Na promoted Fe@Na-ZSM-5 capsule catalyst

○Xu Sun¹, Yingluo He¹, Guohui Yang¹, Noritatsu Tsubaki¹ (1. University of Toyama)

Keywords:Fischer-Tropsch Synthesis, Zeolite, Olefins

Fischer-Tropsch synthesis (FTS) is a catalysis process to convert syngas (a mixture of CO and H₂) into hydrocarbons and oxygenates. Direct synthesis of olefins from syngas using metal-zeolite composite catalysts has attracted lots of attentions for decades. In this work, we designed a novel capsule-like Fe@Na-ZSM-5 catalyst for one-step conversion of syngas to C₅₊ olefins. The Fe@Na-ZSM-5 catalyst realized the gasoline-ranged hydrocarbons selectivity of 52.5 %, in which olefins accounted for more than half. The characterization results indicated that the promoter of Na ions facilitated the formation of Fe₅C₂ phases during FTS reaction, therefore favoring C-C coupling and leading to high gasoline-ranged olefins selectivity. In this work, the novel Na electron promoted metal-zeolite capsule catalyst and its application in FTS for olefins direct synthesis would greatly promote the development of heterogeneous catalysts and functional materials.