CO(2) Capture from High-Humidity Flue Gas Using a Stable Metal-Organic Framework.

CO(2) Capture from High-Humidity Flue Gas Using a Stable Metal-Organic Framework.
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使用稳定的金属有机框架从高湿度烟气中捕获二氧化碳。

DOI:
10.3390/molecules27175608
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发表时间:
2022-08-31
期刊:
Molecules (Basel, Switzerland)
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化石厂烟气是CO2长期稳定的集中排放源,减少其排放势在必行。近年来,吸附剂在减少CO2排放方面发挥了关键作用,但烟气中水蒸气的存在对吸附剂的稳定性提出了挑战。ZIF-94在298 K时表现出良好的CO2吸收能力(53.30 cm 3/g),CO2/N2(15:85,v/v)选择性为54.12。由于其在潮湿条件下优异的结构和性能稳定性,当相对湿度高达99.2%时,CO2/N2混合物仍然在ZIF-94上良好分离,分离时间为30.4 min,与干气实验的分离时间(33.2 min)相似。这些结果表明ZIF-94在工业环境中高湿度条件下用于CO2/N2分离的巨大潜在应用。
The flue gas from fossil fuel power plants is a long-term stable and concentrated emission source of CO2, and it is imperative to reduce its emission. Adsorbents have played a pivotal role in reducing CO2 emissions in recent years, but the presence of water vapor in flue gas poses a challenge to the stability of adsorbents. In this study, ZIF-94, one of the ZIF adsorbents, showed good CO2 uptake (53.30 cm3/g), and the calculated CO2/N2 (15:85, v/v) selectivity was 54.12 at 298 K. Because of its excellent structural and performance stability under humid conditions, the CO2/N2 mixture was still well-separated on ZIF-94 with a separation time of 30.4 min when the relative humidity was as high as 99.2%, which was similar to the separation time of the dry gas experiments (33.2 min). These results pointed to the enormous potential applications of ZIF-94 for CO2/N2 separation under high humidity conditions in industrial settings.
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