High productivity towards C₂–C₄ olefins together with high catalyst stability are key for optimum operation in high temperature Fischer–Tropsch synthesis (HT-FTS). Here, we report the fabrication of Fe@C/Al composites that combine both the outstanding catalytic properties of the Fe–BTC MOF-derived Fe catalyst and the excellent mechanical resistance and textural properties provided by the inorganic AlOOH binder. The addition of AlOOH to Fe–BTC followed by pyrolysis in N₂ atmosphere at 500 °C results in composites with a large mesoporosity, a high Fe/Fe₃O₄ ratio, 10–35 nm average Fe crystallite size and coordinatively unsaturated Al³⁺ sites. In catalytic terms, the addition of AlOOH binder gives rise to enhanced C₂–C₄ selectivity and catalyst mechanical stability in HT-FTS, but at high Al contents the activity decreases. Altogether, the productivity of these Fe@C/Al composites is well above most known Fe catalysts for this process.

中文翻译：

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MOF衍生的Fe @ C / Al复合材料的配方和催化性能用于高温费-托合成†

C ₂ -C ₄烯烃的高生产率以及高催化剂稳定性是高温费托合成（HT-FTS）中最佳操作的关键。在这里，我们报告了结合了Fe–BTC MOF衍生的Fe催化剂的出色催化性能和无机AlOOH粘合剂提供的出色的机械阻力和组织性能的Fe @ C / Al复合材料的制造。向Fe-BTC中添加AlOOH，然后在N ₂气氛中于500°C进行热解，得到的复合材料具有大的介孔率，高的Fe / Fe ₃ O ₄比，平均10-35 nm的铁微晶尺寸和配位不饱和的Al ^{3 +}网站。在催化方面，AlOOH粘合剂的加入提高了HT-FTS中C ₂ -C _4的选择性和催化剂的机械稳定性，但是在高Al含量下，活性降低。总之，这些Fe @ C / Al复合材料的生产率远高于该工艺中最知名的Fe催化剂。