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首页> 外文期刊>Catalysis science & technology >The effect of Mn on the performance of MCF-supported highly dispersed iron catalysts for Fischer-Tropsch synthesis
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The effect of Mn on the performance of MCF-supported highly dispersed iron catalysts for Fischer-Tropsch synthesis

机译：Mn的性能的影响MCF-supported高度分散的铁催化剂费托合成

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摘要

The effect of the Mn promoter in supported iron-based catalysts with different atomic ratios of Mn : Fe : Cu = x : 268 : 18 (x = 0, 9, 27, and 55) using mesoporous silica foam (MCF) as the carrier was evaluated in Fischer-Tropsch synthesis (FTS). High-dispersion iron catalysts with an iron content of up to 30 wt% were prepared using a co-impregnation method. The surface composition and physicochemical properties were characterized by X-ray photoelectron spectroscopy, X-ray diffraction, transmission electron microscopy, scanning electron microscopy, and N-2-physisorption. The introduction of Mn in supported catalysts at a Mn : Fe atomic ratio of 9 : 268 led to the formation of ferric oxide for calcined catalysts; meanwhile, the carbonization of metallic iron was decreased and the reducibility of catalysts was decreased as well, which may be because of the enhanced FeMn interaction. Additionally, the yield of C5+ hydrocarbons could be effectively increased by the Mn promoter; the MCF-supported iron catalyst with an optimal Mn : Fe ratio of 9 : 268 showed the highest C5+ selectivity and the lowest CH4 selectivity.
机译：锰的影响启动子在支持铁基催化剂具有不同原子比率Mn: Fe:铜= x: 268: 18 (x = 0 9 27日和55)使用介孔硅泡沫(MCF)承运人在费计算合成(FTS)。30 wt %的含铁量准备使用co-impregnation方法。表面成分和物理化学属性在x射线的特征光电子能谱、x射线衍射、透射电子显微镜、扫描电子显微镜,N-2-physisorption。引入Mn在支持锰催化剂268年9::Fe原子比导致形成氧化铁的煅烧催化剂;与此同时,金属铁的碳化减少和催化剂的还原性降低,这可能是由于提高高炉交互。收益率的C5 +碳氢化合物可能是有效的增加了Mn启动子;铁催化剂与最优。内格罗蓬特:菲比9: 268 C5 +选择性和最高的甲烷选择性最低。

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