Mesoporous Fe-based spindles designed as catalysts for the Fischer–Tropsch synthesis of C5+ hydrocarbons†,New Journal of Chemistry

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Mesoporous Fe-based spindles designed as catalysts for the Fischer–Tropsch synthesis of C5+ hydrocarbons†
New Journal of Chemistry ( IF 2.7 ) Pub Date : 2018-08-31 00:00:00 , DOI: 10.1039/c8nj03181a
Yulan Zhang _{1,

2,

3,

4,

5} , Xizhu Lin _{1,

2,

3,

4,

5} , Xinjun Li _{5,

6,

7,

8,

9} , Chenguang Wang _{5,

6,

7,

8,

9} , Qiong Long _{1,

2,

3,

4,

5} , Longlong Ma _{5,

6,

7,

8,

9}

Affiliation

Conventional mesoporous catalysts are generally obtained through the dispersion of active phases on porous supports to enhance catalytic performance. However, metal-support interactions can suppress the activation of iron oxides, and this can lead to lower catalytic activity. Moreover, the effects of supports on catalytic performance are complicated for Fischer–Tropsch (FT) synthesis. Herein, we developed novel mesoporous Fe-based spindles and the pores are self-assembled via active phases. This unique structure effectively avoids metal-support interactions during activation and FT synthesis, thus improving the FT activity. More importantly, the selectivity for C₅₊ hydrocarbons is found to be correlated with the pore size. It is identified that Fe/2CTAB, which has the largest pore volume among the three mesoporous spindles (Fe, Fe/CTAB, and Fe/2CTAB), affords the optimum C₅₊ selectivity, up to 65 wt%. This value is much higher than those for traditional co-precipitation catalysts and supported Fe-based catalysts. Moreover, FT synthesis over Fe/2CTAB leads to the lowest CH₄ selectivity.

中文翻译：

介孔铁基纺锤设计用作费托合成C ₅₊碳氢化合物的催化剂†

常规的中孔催化剂通常是通过将活性相分散在多孔载体上以增强催化性能而获得的。然而，金属-载体相互作用可以抑制氧化铁的活化，并且这可以导致较低的催化活性。此外，对于费-托（FT）合成，载体对催化性能的影响十分复杂。在这里，我们开发了新型的介孔铁基纺锤体，并通过活性相自组装孔。这种独特的结构有效地避免了活化和FT合成过程中金属与载体的相互作用，从而提高了FT活性。更重要的是对C ₅₊的选择性发现碳氢化合物与孔径有关。可以确定的是，Fe / 2CTAB在三个中孔纺锤（Fe，Fe / CTAB和Fe / 2CTAB）中具有最大的孔体积，可提供高达65 wt％的最佳C ₅₊选择性。该值远高于传统的共沉淀催化剂和负载型铁基催化剂的值。而且，在Fe / 2CTAB上的FT合成导致最低的CH ₄选择性。

更新日期：2018-08-31

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