Sodium-Containing Spinel Zinc Ferrite as a Catalyst Precursor for the Selective Synthesis of Liquid Hydrocarbon Fuels
Sodium-Containing Spinel Zinc Ferrite as a Catalyst Precursor for the Selective Synthesis of Liquid Hydrocarbon Fuels
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DOI：
10.1002/cssc.201701437
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发表时间：
2017-12-08
期刊：
影响因子：
8.4
通讯作者：
Lee, Jae Sung
中科院分区：
文献类型：
--
作者：
Choi, Yo Han;Ra, Eun Cheol;Lee, Jae Sung
微波辅助水热合成生成了含有Na残留物的ZnFe2O4，作为CO2加氢催化剂的前体，该催化剂具有高CO2转化率和对汽油和柴油范围内高烯烃/石蜡比液体烃产品的高选择性。与Fe_2O_3和氧化锌-Fe_2O_3物理混合物衍生的参比催化剂相比，以锌为结构促进剂的锌铁衍生催化剂含有分散良好的铁颗粒。同时观察到残留的Na电子助剂对C5+烃和烯烃的选择性有很大的提高。Fe2O4衍生的催化剂在CO2 Fischer-Tropsch反应中表现出优异的性能，因为它通过铁的原位碳化很容易形成活性Hagg铁碳化物(-Fe5C2)相。
A microwave-assisted hydrothermal synthesis produces ZnFe2O4 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 Fe2O3 and a ZnO-Fe2O3 physical mixture, the ZnFe2O4-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 ZnFe2O4-derived catalyst exhibits excellent performance in the CO2 Fischer-Tropsch reaction as it forms the active Hagg iron carbide (-Fe5C2) phase readily through the insitu carburization of iron.