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

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

State Key Laboratory of Fine Chemicals, School of Chemical Engineering, Dalian University of Technology, Dalian 116024, Liaoning, China

Received Date: 30 July 2018
Revised Date: 16 August 2018

Fund Project: This work was supported by the National Natural Science Foundation of China (21733002, 21506077), and the Cheung Kong Scholars Program of China (T2015036).

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.
- Nitrogen doping,
- Graphitic carbon,
- Encapsulation,
- Iron-based catalyst,
- Fischer-Tropsch synthesis
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