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CO2 Capture Partner Molecules in Highly Loaded PEI Sorbents
The Journal of Physical Chemistry C ( IF 3.3 ) Pub Date : 2017-09-19 00:00:00 , DOI: 10.1021/acs.jpcc.7b07541
Athanasios Koutsianos 1 , Andrew R. Barron 1 , Enrico Andreoli 1
Affiliation  

Decoupling amine loading from diffusion resistance is one of the main challenges in the development of immobilized amine CO2 sorbents. Water has been reported to serve this goal, alleviating CO2 diffusional hindrance in highly loaded amine sorbents. Acting as a mass transport facilitator, water is not the only partner molecule able to enhance bulk CO2 diffusion. Herein, we show that the enhancing effect of methanol is comparable to that of water in polyethylenimine-based sorbents. Other molecules, such as ethanol, isopropanol, and chloroform, were also examined but did not appear to facilitate CO2 transport and uptake. Based on a comparison of the Hansen solubility parameters of these molecules, it appears that polarity plays a crucial role in enhancing CO2 diffusion together with molecular hindrance and hydrogen bonding to a lesser extent.

中文翻译:

高负荷PEI吸附剂中的CO 2捕集伙伴分子

使胺负载与扩散阻力脱钩是固定化胺CO 2吸附剂开发中的主要挑战之一。据报道,水可以达到这一目的,从而减轻了高负荷胺吸附剂中的CO 2扩散障碍。作为大众运输的促进者,水不是能够增强整体CO 2扩散的唯一伴侣分子。在此,我们表明,在基于聚乙烯亚胺的吸附剂中,甲醇的增强效果与水的增强效果相当。还检查了其他分子,例如乙醇,异丙醇和氯仿,但似乎没有促进CO 2的作用。运输和吸收。根据对这些分子的汉森溶解度参数的比较,似乎极性在较小程度上增强了CO 2扩散以及分子障碍和氢键方面起着至关重要的作用。
更新日期:2017-09-19
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