@inbook{7bbc5477fec142ec8f8ad325c0d551c1,
title = "Synthesis of Stable and Low-CO2Selective Phase-Pure ϵ-Iron Carbide Catalysts in Synthesis Gas Conversion",
abstract = "The Fe-catalyzed Fischer-Tropsch (FT) synthesis reaction is the core of the coal-to-liquids (CTL) process, which is an efficient route to convert coal into liquid fuels via synthesis gas (a mixture of CO and H2). Conventional Fe-based FT catalysts convert typically 30% of the feed CO to undesirable CO2during the FT step. A decrease of CO2production in FT units can reduce the profitability of the overall CTL process. In this context, we synthesized phase-pure ϵ-Fe-carbide FT catalysts by careful control of the pretreatment and carburization conditions starting from Raney Fe. The resulting phase-pure Fe-carbide exhibits a low CO2selectivity during the Fischer-Tropsch reaction. The developed preparation method can be applied to supported Fe catalysts and does not require expensive starting chemicals. The purity and durability of as-synthesized phase-pure ϵ-Fe-carbide catalyst under FT conditions were characterized in detail by in situ characterization techniques. A bulk phase-pure ϵ-Fe-carbide catalyst operated at 23 bar, 235 °C and a H2/CO ratio of 1.5 shows stable performance with no deactivation during a 150 h pilot test. The catalyst is free of primary CO2formation and presents reduced secondary CO2formation compared to conventional Fe-based FT catalysts. These findings contribute to the development of new Fe-based FT catalysts for CTL processes.",
author = "Peng Wang and Wei Chen and Chiang, {Fu Kuo} and Dugulan, {A. Iulian} and Kui Zhang and Jiachun Chai and Weizhen Li and Bo Feng and Quan Lin and {More Authors}",
year = "2020",
doi = "10.1021/bk-2020-1364.ch009",
language = "English",
series = "ACS Symposium Series",
publisher = "American Chemical Society (ACS)",
pages = "229--255",
editor = "Lang Qin and Liang-Shih Fan",
booktitle = "ACS Symposium Series",
address = "United States",
}