胺类分子在CO2的捕获中可以起到选择性提升的作用,本文选择小尺寸的乙二胺分子对具有不饱和金属位点的轻金属铝基金属有机骨架(Al-MOFs)材料MIL-100Al进行改性,利用XRD、N2吸附和FT-IR等对改性材料的结构进行表征,测试了不同浓度的乙二胺改性的MIL-100Al对CO2和CH4吸附性能.结果表明,与原始的MIL-100Al材料相比,改性后的材料对CO2吸附量有明显提高,CH4的吸附量却降低,从而进一步提高了材料的CO2/CH4吸附选择性,提升了吸附分离的效果.%Amine molecule plays a role of improving selectivity on the CO2 capture.Small size ethylenediamine molecules were selected to modify the light metal Al-based metal-organic framework (MOFs) MIL-100Al with unsaturated metal sites in this work, the structure of the materials was characterized by XRD, N2 adsorption and FT-IR.The adsorption properties of MIL-100Al modified with different concentrations of ethylenediamine on CO2 and CH4 were tested.Compared with the original MIL-100Al sample, the amount of CO2 adsorbed by MIL-100Al modified with ethylenediamine is significantly improved, while CH4 adsorption decreases.The CO2/CH4 adsorption selectivity of the material therefor is further improved, and the performance of adsorption separation is enhanced.
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