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A screening study of alcohol solvents for alkanolamine-based CO2 capture
International Journal of Greenhouse Gas Control ( IF 3.9 ) Pub Date : 2020-06-07 , DOI: 10.1016/j.ijggc.2020.103081
Firoz Alam Chowdhury , Kazuya Goto , Hidetaka Yamada , Yoichi Matsuzaki

The present study was aimed at developing a non-aqueous absorbent system that does not form any precipitate/solid upon exposure to CO2. More specifically, the non-aqueous absorbent system must be a homogeneous mixture (single phase) within the whole range of CO2 loading. At the same time, sufficient amine regeneration must occur at a low temperature of 80–90 °C compared to reference non-aqueous monoethanolamine (MEA)-based absorbents. To achieve this target, 18 alcohols were investigated as solvents and 4 alkyl-linked alkanolamines were evaluated as absorbents. Several experiments mixing alkanolamines with alcohols were performed to evaluate their CO2 capture performance. High-performance non-aqueous liquid absorbents (without solid/precipitate formation) with the advantages of higher absorption rates, higher cyclic capacities, higher regeneration efficiencies, lower specific heats, and lower heats of reaction compared to reference MEA-based non-aqueous absorbents were successfully developed herein. The favorable features of these absorbents will provide the basis for the discovery of potential non-aqueous amine-based absorbents.



中文翻译:

醇溶剂用于链烷醇胺基CO 2捕集的筛选研究

本研究旨在开发一种非水吸收系统,该系统在暴露于CO 2时不会形成任何沉淀/固体。更具体地说,非水吸收剂系统必须是在整个CO 2负载范围内的均质混合物(单相)。同时,与参考非水单乙醇胺(MEA)基吸收剂相比,在80–90°C的低温下必须发生足够的胺再生。为了实现此目标,研究了18种醇作为溶剂,并对4种烷基连接的链烷醇胺作为吸收剂进行了评估。进行了一些将链烷醇胺与醇混合的实验,以评估其CO 2捕获性能。高性能非水液体吸收剂(不形成固体/沉淀物),与基于参考MEA的非水吸收剂相比,具有更高的吸收速率,更高的循环容量,更高的再生效率,更低的比热和更低的反应热的优势在这里成功开发。这些吸收剂的有利特征将为发现潜在的非水胺基吸收剂提供基础。

更新日期:2020-06-07
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