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Oxygen-Selective Adsorption Property of Ultramicroporous MOF Cu(Qc)2 for Air Separation
Industrial & Engineering Chemistry Research ( IF 3.8 ) Pub Date : 2020-03-23 , DOI: 10.1021/acs.iecr.0c00441 Yuning Tang 1 , Xun Wang 1 , Yijing Wen 1 , Xin Zhou 1 , Zhong Li 1, 2
Industrial & Engineering Chemistry Research ( IF 3.8 ) Pub Date : 2020-03-23 , DOI: 10.1021/acs.iecr.0c00441 Yuning Tang 1 , Xun Wang 1 , Yijing Wen 1 , Xin Zhou 1 , Zhong Li 1, 2
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In this work, the O2/N2 adsorption behavior of ultramicroporous MOF Cu(Qc)2, with preferential adsorption of O2 over N2, was investigated for the first time. Cu(Qc)2 was prepared using a room-temperature synthesis strategy and then characterized. High-pressure isotherms of O2 and N2 were measured at different temperatures. The molecular simulation was used to reveal the adsorption mechanism of O2 and N2 on the copper sites of Cu(Qc)2. Inverse gas chromatography (IGC) experiments were applied to measure surface free energy for O2 and N2 adsorption for evaluation of the affinity between adsorbates O2/N2 and Cu(Qc)2. Results showed that the adsorbed amounts of O2 on Cu(Qc)2 increased significantly with pressure rising, reaching as high as 4.48 mmol/g at 259 K and 50 bar, while that of N2 increased slowly to 0.98 mmol/g. The uptake ratio of O2/N2 on Cu(Qc)2 reached 4.62 at 298 K and 50 bar. The IAST-predicted O2/N2 (21:78 v/v) selectivity of Cu(Qc)2 reached 7 at 259 K and 50 bar. The ultramicroporous MOF Cu(Qc)2 is the potential for separation of O2/N2 from the air.
中文翻译：
超微孔MOF Cu（Qc）2对空气分离的氧选择性吸附性能
在这项工作中，首次研究了超微孔MOF Cu（Qc）2的O 2 / N 2吸附行为，其中O 2优先于N 2。使用室温合成策略制备Cu（Qc）2并进行表征。在不同温度下测量了O 2和N 2的高压等温线。通过分子模拟揭示了O 2和N 2在Cu（Qc）2的铜位上的吸附机理。进行了反相气相色谱（IGC）实验以测量O 2的表面自由能N 2和N 2吸附用于评估被吸附物O 2 / N 2与Cu（Qc）2的亲和力。结果表明，吸附量的O- 2上的Cu（QC）2与压力在259 K和50巴显著增加上升，达到高达4.48毫摩尔/克，而N的2缓慢增加至0.98毫摩尔/克。Cu（Qc）2上的O 2 / N 2吸收率在298 K和50 bar下达到4.62。IAST预测的Cu（Qc）2的O 2 / N 2（21:78 v / v）选择性在259 K和50 bar下达到7。超微孔MOF Cu（Qc）2是从空气中分离出O 2 / N 2的潜力。
更新日期：2020-03-24
中文翻译：
超微孔MOF Cu（Qc）2对空气分离的氧选择性吸附性能
在这项工作中，首次研究了超微孔MOF Cu（Qc）2的O 2 / N 2吸附行为，其中O 2优先于N 2。使用室温合成策略制备Cu（Qc）2并进行表征。在不同温度下测量了O 2和N 2的高压等温线。通过分子模拟揭示了O 2和N 2在Cu（Qc）2的铜位上的吸附机理。进行了反相气相色谱（IGC）实验以测量O 2的表面自由能N 2和N 2吸附用于评估被吸附物O 2 / N 2与Cu（Qc）2的亲和力。结果表明，吸附量的O- 2上的Cu（QC）2与压力在259 K和50巴显著增加上升，达到高达4.48毫摩尔/克，而N的2缓慢增加至0.98毫摩尔/克。Cu（Qc）2上的O 2 / N 2吸收率在298 K和50 bar下达到4.62。IAST预测的Cu（Qc）2的O 2 / N 2（21:78 v / v）选择性在259 K和50 bar下达到7。超微孔MOF Cu（Qc）2是从空气中分离出O 2 / N 2的潜力。
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