使用稳定的金属-有机骨架从高湿度烟道气中捕获 CO。
CO Capture from High-Humidity Flue Gas Using a Stable Metal-Organic Framework.
机构信息
Shanxi Key Laboratory of Gas Energy Efficient and Clean Utilization, College of Chemical Engineering and Technology, Taiyuan University of Technology, Taiyuan 030024, China.
出版信息
Molecules. 2022 Aug 31;27(17):5608. doi: 10.3390/molecules27175608.
The flue gas from fossil fuel power plants is a long-term stable and concentrated emission source of CO, and it is imperative to reduce its emission. Adsorbents have played a pivotal role in reducing CO 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 CO uptake (53.30 cm/g), and the calculated CO/N (15:85, /) selectivity was 54.12 at 298 K. Because of its excellent structural and performance stability under humid conditions, the CO/N 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 CO/N separation under high humidity conditions in industrial settings.
燃煤电厂的烟气是 CO 的长期稳定且集中的排放源，减少其排放量迫在眉睫。吸附剂在近年来减少 CO 排放方面发挥了关键作用，但烟道气中水蒸气的存在对吸附剂的稳定性提出了挑战。在这项研究中，沸石咪唑酯骨架结构 94（ZIF-94）作为 ZIF 吸附剂之一，表现出良好的 CO 吸收能力（53.30 cm/g），在 298 K 下计算出的 CO/N（15:85，/）选择性为 54.12。由于其在潮湿条件下具有出色的结构和性能稳定性，即使在相对湿度高达 99.2%的情况下，CO/N 混合物仍能在 ZIF-94 上很好地分离，分离时间为 30.4 分钟，与干燥气体实验的分离时间（33.2 分钟）相似。这些结果表明，ZIF-94 在工业环境中高湿度条件下用于 CO/N 分离具有巨大的应用潜力。
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