Iron-based catalysts encapsulated by nitrogen-doped graphitic carbon for selective synthesis of liquid fuels through the Fischer-Tropsch process

doi:10.1016/S1872-2067(18)63158-4

Abstract

Abstract:

Fischer-Tropsch synthesis (FTS) has the potential to be a powerful strategy for producing liquid fuels from syngas if highly selective catalysts can be developed. Herein, a series of iron nanoparticle catalysts encapsulated by nitrogen-doped graphitic carbon were prepared by a one-step pyrolysis of a ferric L-glutamic acid complex. The FeC-800 catalyst pyrolyzed at 800℃ showed excellent catalytic activity (239.4 μmol_CO g_Fe^-1 s^-1), high C₅-C₁₁ selectivity (49%), and good stability in FTS. The high dispersion of ferric species combined with a well-encapsulated structure can effectively inhibit the migration of iron nanoparticles during the reaction process, which is beneficial for high activity and good stability. The nitrogen-doped graphitic carbon shell can act as an electron donor to the iron particles, thus promoting CO activation and expediting the formation of Fe₅C₂, which is the key factor for obtaining high C₅-C₁₁ selectivity.

Key words: Nitrogen doping, Graphitic carbon, Encapsulation, Iron-based catalyst, Fischer-Tropsch synthesis

Lei Tang, Xiao-Ling Dong, Wei Xu, Lei He, An-Hui Lu. Iron-based catalysts encapsulated by nitrogen-doped graphitic carbon for selective synthesis of liquid fuels through the Fischer-Tropsch process[J]. Chinese Journal of Catalysis, 2018, 39(12): 1971-1979.

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URL: https://www.cjcatal.com/EN/10.1016/S1872-2067(18)63158-4

https://www.cjcatal.com/EN/Y2018/V39/I12/1971

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