Coordination effect-regulated CO<sub>2</sub>capture with an alkali metal onium salts/crown ether system
作者:Zhen-Zhen Yang、De-en Jiang、Xiang Zhu、Chengcheng Tian、Suree Brown、Chi-Linh Do-Thanh、Liang-Nian He、Sheng Dai
DOI:10.1039/c3gc41513a
日期:——
(alkali metal onium salts). The essence of our strategy was to increase the steric hindrance of cations so as to enhance a carbamic acid pathway for CO2 capture. Our easily synthesized alkali metal amino acid salts or phenolates were coordinated with crown ethers, in which highly sterically hindered cations were obtained through a strong coordination effect of crown ethers with alkali metal cations
采用易于合成的含氨基的吸收剂(碱金属鎓盐),通过配位效应实现等摩尔CO 2吸收。我们策略的实质是增加阳离子的空间位阻,从而增强捕获CO 2的氨基甲酸途径。我们易于合成的碱金属氨基酸盐或酚盐与冠醚配位,其中冠醚与碱金属阳离子的强配位作用获得了高度空间受阻的阳离子。例如,通过脯氨酸钾/ 18-crown-6可以达到0.99的CO 2容量,并通过NMR,FT-IR和量子化学计算来表征其通过氨基甲酸的形成途径。捕获的CO 2可以在非常温和的条件下(50°C,N 2)汽提。因此,该协议为向碳捕集与封存的高效和低能耗工艺发展技术创新提供了替代方案。