Complete encapsulation of zeolite supported Co based core with silicalite-1 shell to achieve high gasoline selectivity in Fischer-Tropsch synthesis

• Published in: Fuel (Guildford) Vol. 215; pp. 226 - 231
• Main Authors: Javed, Mudassar, Cheng, Shilin, Zhang, Guihua, Dai, Peiyao, Cao, Yingnan, Lu, Chengxue, Yang, Ruiqin, Xing, Chuang, Shan, Shengdao
• Format: Journal Article
• Language: English
• Published: Kidlington Elsevier Ltd 01-03-2018; Elsevier BV
• Subjects: Carbon dioxide; Catalysis; Catalysts; Catalytic activity; Chemical synthesis; Core-shell; Fischer-Tropsch process; Fischer-Tropsch synthesis; Gasoline; Hydrothermal crystal growth; Microcapsule; Microencapsulation; Selectivity; Silica; Silicalite; Silicalite-1; Zeolites; Fischer-Tropsch synthesis; Core-shell; Gasoline; Silicalite-1; Microcapsule
• ISSN: 0016-2361; 1873-7153
• DOI: 10.1016/j.fuel.2017.10.042

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•Silicalite-1 based microcapsule catalyst is prepared with hydrothermal synthesis.•Silicalite-1 shell is 15 nm thick and it has microporous structure.•Prepared catalyst exhibited high gasoline and low CH4 and CO2 selectivity in FTS.•Hydrophobic silicalite-1 shell contributes in lowering CO2 and increasing olefins.•High gasoline selectivity is attributed to silicalite-1 pore structure.
Zeolite-based capsule catalysts have exhibited significant results in terms of catalytic activity and product selectivity in Fisher-Tropsch synthesis. Herein, we synthesized a ZSM-5 supported Co based microcapsule catalyst encapsulated by microporous silicalite-1 shell via hydrothermal synthesis process. Synthesized microcapsule catalyst has a uniform microporous structure with an additional stay zone for both reactants as well as product inside its channels and showed significantly high CO conversion rate (68.9%) and gasoline range hydrocarbon selectivity (74.7%) with a low CO2 and CH4 selectivity (2.8% and 8.7%, respectively). This microcapsule catalyst may consider to be used on commercial scale because of its facile preparation method and promising performance.