High-temperature Fischer–Tropsch synthesis represents a sustainable alternative for direct light olefin synthesis from syngas derived from fossil and renewable feedstocks. It is found that the promotion of iron catalysts with metals used for soldering (Bi and Pb) results in a remarkable increase in the light olefin production rate with a possibility to conduct Fischer–Tropsch synthesis at low reaction pressure. A combination of characterization techniques uncovered notable migration of the promoting elements during the reaction and decoration of iron carbide nanoparticles with the promoters. The promoters seem to facilitate CO dissociation by removing O atoms from iron carbide.

中文翻译：

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在轻度反应条件下从合成气直接合成轻烯烃的铁催化剂的焊接

高温费-托合成法是从化石和可再生原料中合成气直接合成轻质烯烃的可持续替代方法。研究发现，用焊接金属（Bi和Pb）促进铁催化剂可显着提高轻质烯烃的生产率，并有可能在低反应压力下进行费托合成。表征技术的组合发现在碳化铁纳米粒子与促进剂的反应和装饰过程中，促进元素的显着迁移。促进剂似乎通过从碳化铁中除去O原子来促进CO的离解。