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Molecular encapsulation of 5, 10, 15, 20-tetrakis (4-methylphenyl) porphyrinato iron (III) chloride (FeTPP) into MIL-101(Cr) for superior CO2/N2 separation performance
Separation and Purification Technology ( IF 8.1 ) Pub Date : 2023-12-11 , DOI: 10.1016/j.seppur.2023.126021
Guangping Lei , Yang Lu , Zihan Liu , Yayun Zhang , Guojun Xi , Huiyuan Cheng , Wenji Rao , Xuhuan Guo

The greenhouse effect associated with excessive CO2 emission has led to a series of environmental issues, thus developing excellent adsorbents for CO2 capture from flue gas offers a sustainable approach. To combine the merit of multiple functional components, novel FeTPP@MIL-101(Cr) was prepared by incorporation of 5,10,15,20-tetrakis(4-methylphenyl)porphyrinato iron (III) chloride (FeTPP) into MIL-101(Cr) cages via in-situ packaging strategy. The cage-confined FeTPP can both regulate the pore structures of MIL-101(Cr) and provide additional binding sites for CO2 adsorption. Profiting from extra interactions for CO2 component and the “sieving effect” for N2 component induced by incorporation of FeTPP, the discrepancy of isosteric heat for CO2 and N2 was largely amplified. Notably, the CO2/N2 selectivity (15/85, v/v) calculated by ideal adsorbed solution theory (IAST) increased from 17.1 (MIL-101 (Cr)) to 41.8 (FeTPP@MIL-101 (Cr) with FeTPP loading of 4.98 wt%) at 273 K, 100 kPa, which is 2.44 times larger than that of pristine MIL-101 (Cr) and also exceeds most reported adsorbents.

中文翻译:


将 5、10、15、20-四(4-甲基苯基)卟啉铁 (III) 氯化铁 (FeTPP) 分子封装到 MIL-101(Cr) 中,以获得卓越的 CO2/N2 分离性能



与过量排放 CO2 相关的温室效应导致了一系列环境问题,因此开发用于从烟气中捕获 CO2 的优秀吸附剂提供了一种可持续的方法。为了结合多种功能成分的优点,通过将 5,10,15,20-四(4-甲基苯基)卟啉铁 (III) 氯化铁 (FeTPP) 掺入 MIL-101(Cr) 笼中,通过原位封装策略制备了新型 FeTPP@MIL-101(Cr)。笼式限制的 FeTPP 既可以调节 MIL-101(Cr) 的孔结构,又可以为 CO2 吸附提供额外的结合位点。受益于 CO2 组分的额外相互作用和掺入 FeTPP 诱导的 N2 组分的“筛分效应”,CO2 和 N2 的等位热差异在很大程度上被放大了。值得注意的是,在 273 K、100 kPa 下,通过理想吸附溶液理论 (IAST) 计算的 CO2/N2 选择性 (15/85, v/v) 从 17.1 (MIL-101 (Cr)) 增加到 41.8 (FeTPP@MIL-101 (Cr),FeTPP 负载量为 4.98 wt%),比原始 MIL-101 (Cr) 大 2.44 倍,也超过了大多数已报道的吸附剂。
更新日期:2023-12-11
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