Bai Jingyang, Qin Chuan, Xu Yanfei, Du Yixiong, Ma Guangyuan, Ding Mingyue
School of Power and Mechanical Engineering, the Institute of Technological Sciences, Wuhan University, Wuhan 430072, China.
Shenzhen Research Institute of Wuhan University, Shenzhen 518108, China.
iScience. 2021 Jun 12;24(7):102715. doi: 10.1016/j.isci.2021.102715. eCollection 2021 Jul 23.
Exploiting new carbon supports with adjustable metal-support interaction and low price is of prime importance to realize the maximum active iron efficiency and industrial-scale application of Fe-based catalysts for Fischer-Tropsch synthesis (FTS). Herein, a simple, tunable, and scalable biochar support derived from the sugarcane bagasse was successfully prepared and was first used for FTS. The metal-support interaction was precisely controlled by functional groups of biosugarcane-based carbon material and different iron species sizes. All catalysts synthesized displayed high activities, and the iron-time-yield of Fe/C even reached 1,198.9 μmol g s. This performance was due to the unique structure and characteristics of the biosugarcane-based carbon support, which possessed abundant C-O, C=O (η(O) and η(C, O)) functional groups, thus endowing the moderate metal-support interaction, high dispersion of active iron species, more active ε-FeC phase, and, most importantly, a high proportion of FeC/Fe, facilitating the maximum iron efficiency and intrinsic activity of the catalyst.
开发具有可调节金属-载体相互作用且价格低廉的新型碳载体对于实现费托合成（FTS）铁基催化剂的最大活性铁效率和工业规模应用至关重要。在此，成功制备了一种源自甘蔗渣的简单、可调节且可扩展的生物炭载体，并首次将其用于FTS。通过基于生物甘蔗的碳材料的官能团和不同铁物种尺寸精确控制金属-载体相互作用。所有合成的催化剂均表现出高活性，Fe/C的铁时空产率甚至达到1198.9 μmol g⁻¹ s⁻¹。这种性能归因于基于生物甘蔗的碳载体的独特结构和特性，其具有丰富的C-O、C=O（η(O)和η(C, O)）官能团，从而赋予适度的金属-载体相互作用、活性铁物种的高分散性、更多活性ε-FeC相，最重要的是，高比例的FeC/Fe，促进了催化剂的最大铁效率和本征活性。
