The pore-size effect on ethane adsorption and ethane/ethylene separation in three isostructural metal azolate frameworks (MAF-123-Mn/Zn/Cu) were thoroughly investigated. MAF-123-Mn/Zn/Cu were synthesized by the solvothermal method on a gram scale. Decreasing the pore size from 6.1 to 4.9 Å leads to an increase in the ethane adsorption energy from 23 to 27.5 kJ mol^–1 and further ethane/ethylene separation efficiency. Molecule simulations revealed that a shorter ethane–framework interaction distance in MAF-123-Zn than that in MAF-123-Mn is responsible for the increased adsorption energy. Dynamic breakthrough experiments manifest that these metal azolate frameworks can effectively produce high-purity ethylene from ethane in one adsorption step.

中文翻译：

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孔尺寸对三种同构金属偶氮酸盐骨架中乙烯与乙烷分离的影响。

深入研究了孔径对乙烷吸附和乙烷/乙烯在三种同构结构的金属偶氮酸盐骨架（MAF-123-Mn / Zn / Cu）中的分离的影响。MAF-123-Mn / Zn / Cu通过溶剂热法以克为单位合成。将孔径从6.1减小到4.9Å会导致乙烷吸附能从23 kJ mol ^–1增加到27.5 kJ mol ^–1，并进一步提高了乙烷/乙烯的分离效率。分子模拟显示，MAF-123-Zn的乙烷-骨架相互作用距离比MAF-123-Mn短负责增加吸附能。动态突破性实验表明，这些金属偶氮酸盐骨架可在一个吸附步骤中有效地从乙烷生产高纯度乙烯。