Experiments were performed at both normal and rather extreme Fischer–Tropsch Synthesis (FTS) operating conditions over a typical cobalt‐based catalyst, with the aim of exploring if aspects of the reaction mechanism could be elucidated. The results show that CO reacted when co‐feeding C₂H₄ with syngas, while CO did not react with H₂ in absence of C₂H₄, under extremely low‐temperature conditions (140°C). The adsorbed CO and C₂H₄ may behave as monomers and initiators, respectively, and react with each other to form long chain hydrocarbons. It suggests that the CC bond coupling precedes the CO bond dissociation, which is consistent with the CO‐insertion mechanism. C_3–6 product distribution with a feed of H₂/CO/C₂H₄ at low temperature followed the same trends in terms of normal FTS product distribution. The observed FTS‐type chain growth reaction that occurs at abnormally low temperatures (140°C) when co‐feeding C₂H₄ may provide new insights into the chemistry of FTS.

中文翻译：

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乙烯共进料的费-托合成：低温共插入机理的实验证据

在典型的钴基催化剂上的正常和极端费-托合成（FTS）操作条件下均进行了实验，目的是探索是否可以阐明反应机理的各个方面。结果表明，在极低的温度条件下（140°C），当将C ₂ H ₄与合成气共同进料时，CO反应，而在没有C ₂ H _4的情况下，CO不会与H ₂反应。吸附的CO和C ₂ H ₄可以分别充当单体和引发剂，并且彼此反应形成长链烃。这表明CC键耦合先于CO键解离，与共插入机制一致。在低温下以H ₂ / CO / C ₂ H ₄进料的C _3–6产品分布遵循正常FTS产品分布的相同趋势。当共同进料C ₂ H ₄时，观察到的在异常低温（140°C）下发生的FTS型链增长反应可能为FTS的化学提供新的见解。