Coordination effect-regulated CO2 capture with an alkali metal onium salts/crown ether system

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

Coordination effect-regulated CO₂ capture with an alkali metal onium salts/crown ether system

Zhen Zhen Yang, De En Jiang, Xiang Zhu, Chengcheng Tian, Suree Brown, Chi Linh Do-Thanh, Liang Nian He, Sheng Dai

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Abstract

A coordination effect was employed to realize equimolar CO₂ absorption, adopting easily synthesized amino group containing absorbents (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 CO ₂ 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. For example, a CO₂ capacity of 0.99 was attained by potassium prolinate/18-crown-6, being characterized by NMR, FT-IR, and quantum chemistry calculations to go through a carbamic acid formation pathway. The captured CO₂ can be stripped under very mild conditions (50 °C, N₂). Thus, this protocol offers an alternative for the development of technological innovation towards efficient and low energy processes for carbon capture and sequestration.

Original language	English
Pages (from-to)	253-258
Number of pages	6
Journal	Green Chemistry
Volume	16
Issue number	1
DOIs	https://doi.org/10.1039/c3gc41513a
State	Published - Jan 2014

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title = "Coordination effect-regulated CO2 capture with an alkali metal onium salts/crown ether system",

abstract = "A coordination effect was employed to realize equimolar CO2 absorption, adopting easily synthesized amino group containing absorbents (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 CO 2 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. For example, a CO2 capacity of 0.99 was attained by potassium prolinate/18-crown-6, being characterized by NMR, FT-IR, and quantum chemistry calculations to go through a carbamic acid formation pathway. The captured CO2 can be stripped under very mild conditions (50 °C, N2). Thus, this protocol offers an alternative for the development of technological innovation towards efficient and low energy processes for carbon capture and sequestration.",

author = "Yang, {Zhen Zhen} and Jiang, {De En} and Xiang Zhu and Chengcheng Tian and Suree Brown and Do-Thanh, {Chi Linh} and He, {Liang Nian} and Sheng Dai",

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AU - Yang, Zhen Zhen

AU - Jiang, De En

AU - Zhu, Xiang

AU - Tian, Chengcheng

AU - Brown, Suree

AU - Do-Thanh, Chi Linh

AU - He, Liang Nian

AU - Dai, Sheng

PY - 2014/1

Y1 - 2014/1

N2 - A coordination effect was employed to realize equimolar CO2 absorption, adopting easily synthesized amino group containing absorbents (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 CO 2 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. For example, a CO2 capacity of 0.99 was attained by potassium prolinate/18-crown-6, being characterized by NMR, FT-IR, and quantum chemistry calculations to go through a carbamic acid formation pathway. The captured CO2 can be stripped under very mild conditions (50 °C, N2). Thus, this protocol offers an alternative for the development of technological innovation towards efficient and low energy processes for carbon capture and sequestration.

AB - A coordination effect was employed to realize equimolar CO2 absorption, adopting easily synthesized amino group containing absorbents (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 CO 2 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. For example, a CO2 capacity of 0.99 was attained by potassium prolinate/18-crown-6, being characterized by NMR, FT-IR, and quantum chemistry calculations to go through a carbamic acid formation pathway. The captured CO2 can be stripped under very mild conditions (50 °C, N2). Thus, this protocol offers an alternative for the development of technological innovation towards efficient and low energy processes for carbon capture and sequestration.

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Coordination effect-regulated CO₂ capture with an alkali metal onium salts/crown ether system

Abstract

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