当前位置: X-MOL 学术J. Am. Chem. Soc. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
CO2-Selective Absorbents in Air: Reverse Lipid Bilayer Structure Forming Neutral Carbamic Acid in Water without Hydration
Journal of the American Chemical Society ( IF 15.0 ) Pub Date : 2017-03-24 , DOI: 10.1021/jacs.7b01049
Fuyuhiko Inagaki 1 , Chiaki Matsumoto 1 , Takashi Iwata 1 , Chisato Mukai 1
Affiliation  

Emission gas and air contain not only CO2 but also plentiful moisture, making it difficult to achieve selective CO2 absorption without hydration. To generate absorbed CO2 (wet CO2) under heating, the need for external energy to release the absorbed water has been among the most serious problems in the fields of carbon dioxide capture and storage (CCS) and direct air capture (DAC). We found that the introduction of the hydrophobic phenyl group into alkylamines of CO2 absorbents improved the absorption selectivity between CO2 and water. Furthermore, ortho-, meta-, and para-xylylenediamines (OXDA, MXDA, PXDA, respectively) absorbed only CO2 in air without any hydration. Notably, MXDA·CO2 was formed as an anhydrous carbamic acid even in water, presumably because it was covered with hydrophobic phenyl groups, which induces a reverse lipid bilayer structure. Dry CO2 was obtained from heating MXDA·CO2 at 103-120 °C, which was revealed to involve chemically the Grignard reaction to form the resulting carboxylic acids in high yields.

中文翻译:

空气中的 CO2 选择性吸收剂:在没有水合的情况下在水中形成中性氨基甲酸的反向脂质双层结构

排放气体和空气中不仅含有 CO2,还含有大量水分,因此在不水合的情况下很难实现 CO2 的选择性吸收。为了在加热下产生吸收的 CO2(湿 CO2),需要外部能量来释放吸收的水一直是二氧化碳捕获和储存(CCS)和直接空气捕获(DAC)领域中最严重的问题之一。我们发现将疏水性苯基引入到 CO2 吸收剂的烷基胺中可以提高 CO2 和水之间的吸收选择性。此外,邻苯二甲胺、间苯二甲胺和对苯二甲胺(分别为 OXDA、MXDA、PXDA)仅吸收空气中的 CO2,没有任何水合作用。值得注意的是,即使在水中,MXDA·CO2 也会以无水氨基甲酸的形式形成,大概是因为它被疏水性苯基团覆盖,其诱导反向脂质双层结构。通过在 103-120 °C 下加热 MXDA·CO2 获得干燥的 CO2,这被揭示涉及化学上的格氏反应以高产率形成所得羧酸。
更新日期:2017-03-24
down
wechat
bug