A search for selectivity to enable CO2 capture with porous adsorbents,Energy & Environmental Science

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A search for selectivity to enable CO2 capture with porous adsorbents
Energy & Environmental Science ( IF 32.4 ) Pub Date : 2017-10-11 00:00:00 , DOI: 10.1039/c7ee02110k
M. Oschatz _{1,

2,

3,

4,

5} , M. Antonietti _{1,

2,

3,

4,

5}

Affiliation

Fundamental aspects and actual developments of selective CO₂ capture from relevant sources (flue gas or air) by reversible physisorption are critically reviewed. Thermodynamic as well as kinetic principles of CO₂ adsorption in the presence of other gases are linked to current approaches of materials development. Whilst hundreds or even thousands of porous materials have been evaluated for CO₂ capture, research in this field is still full of challenges, as for instance a feasible physical adsorbent for CO₂ capture for direct capture from air has still not been found. Current attempts towards the optimization of materials in terms of CO₂ uptake/selectivity, regenerability, tolerance against water, and cost most often exclude each other. The aim of this article is not to summarize all recent attempts towards tailoring of materials for selective CO₂ capture but to discuss the most fundamental aspects of adsorptive CO₂ separation in order to illuminate the “sweet spot” to be explored when electronic structure, polarity, and pore size/geometry are rationally balanced and optimized – just like nature does when exerting selective binding of gases.

中文翻译：

寻找能够通过多孔吸附剂捕获 CO _2的选择性

严格审查了可逆物理吸附从相关来源（烟气或空气）中选择性捕集CO _2的基本方面和实际进展。在存在其他气体时，CO ₂吸附的热力学原理和动力学原理与当前的材料开发方法有关。尽管已经评估了成百上千的多孔材料的CO ₂捕集，但该领域的研究仍然充满挑战，例如，仍未找到用于直接从空气中捕集CO ₂的可行的物理吸附剂。当前针对CO ₂进行材料优化的尝试吸收/选择性，可再生性，耐水性和成本通常相互排斥。本文的目的不是总结所有针对选择性CO ₂捕集材料的定制的最新尝试，而是讨论吸附性CO ₂分离的最基本方面，以阐明电子结构，极性时要探索的“最佳点”。，并且孔径/几何形状得到合理平衡和优化-就像自然界中对气体的选择性结合一样。

更新日期：2017-10-11

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