Carbide phases on iron-based Fischer-Tropsch synthesis catalysts part I: Characterization studies
Carbide phases on iron-based Fischer-Tropsch synthesis catalysts part I: Characterization studies
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铁基费托合成催化剂上的碳化物相第一部分：表征研究
DOI：
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发表时间：
1990
期刊：
影响因子：
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通讯作者：
J. Butt
中科院分区：
文献类型：
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作者：
J. Butt
本部分综述了铁基费托催化剂上形成的铁碳化物相的表征，重点介绍了所选铁和负载铁催化剂的Mössbauer和XPS研究，并结合了一些活性和选择性的具体结果。Mössbauer研究清楚地表明，在合成反应条件下，铁催化剂上块状碳化物的演化；XPS结果表明了这些与合成条件下近地表物种的性质及其时间演化的关系。对还原铁、未还原铁和碳化铁催化剂进行了比较；XPS和反应结果表明，即使在没有碳化物相的情况下，Fe3O4也具有较强的合成活性。
The characterization of iron carbide phases formed on iron-based Fischer-Tropsch catalysts is reviewed in this part with particular emphasis on Mössbauer and XPS studies of selected iron and supported iron catalysts, in combination with some specific results in activity and selectivity. Mössbauer studies have shown clearly the evolution of bulk carbide species on iron catalysts under synthesis reaction conditions; the relationship of these to the nature of near-surface species and their temporal evolution under synthesis conditions is indicated by XPS results. Comparisons among reduced, unreduced and carbided iron catalysts are given; XPS and reaction results suggest that Fe3O4 is active for synthesis even in the absence of carbide phases.