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ChemSusChem. 2017 Dec 8;10(23):4764-4770. doi: 10.1002/cssc.201701437. Epub 2017 Oct 25.

Sodium-Containing Spinel Zinc Ferrite as a Catalyst Precursor for the Selective Synthesis of Liquid Hydrocarbon Fuels.

Author information

1
Division of Advanced Nuclear Engineering, Pohang Accelerator Laboratory, Pohang University of Science and Technology (POSTECH), Pohang, 790-784, Korea.
2
School of Energy and Chemical Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan, 44919, Korea.

Abstract

A microwave-assisted hydrothermal synthesis produces ZnFe2 O4 containing Na residue as a precursor to a CO2 hydrogenation catalyst that displays high CO2 conversion and high selectivity to liquid hydrocarbon products in the gasoline and diesel range with high olefin-to-paraffin ratios. Compared to reference catalysts derived from Fe2 O3 and a ZnO-Fe2 O3 physical mixture, the ZnFe2 O4 -derived catalyst contains well-dispersed iron particles with Zn serving as a structural promoter. A profound effect of the residual Na as an electronic promoter is also observed, which improves the selectivity for C5+ hydrocarbons and olefins. The ZnFe2 O4 -derived catalyst exhibits excellent performance in the CO2 Fischer-Tropsch reaction as it forms the active Hägg iron carbide (χ-Fe5 C2 ) phase readily through the in situ carburization of iron.

KEYWORDS:

carbon dioxide; fischer-tropsch synthesis; fuels; hydrogenation; spinel phases

PMID:
29068558
DOI:
10.1002/cssc.201701437

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