(321c) A Nove Amino-Functionalized Ionic Liquid for CO2 Capture

Ionic liquids (ILs), especially amino-functionalized ionic liquids, have been found to be effective for CO₂ capture because of their unique properties such as negligible vapor pressure, high thermal stability and good absorption capacity^[1-2]. As reported ^[3-5], ILs of more amine groups could afford higher CO₂ solubility. To explore deeply into this viewpoint, a new ionic liquid is synthesized and used in lab scale of CO₂capture experiments to identify the relationship between the structure characteristics and capture performance in terms of the absorption rate and capacity.

In present work, a novel amino-functionalized ionic liquid was synthesized and characterized by ¹H NMR, ¹³C NMR, IR and MS. The physicochemical properties including glass transition temperature and thermal decomposition temperature were tested. Experiment result shows that this ionic liquid is capable of rapid capture 0.174g CO₂ / g IL at 303.15K and atmospheric pressure, which is the theoretical maximum for absorption of CO₂ chemically. The interactions of the ionic liquid with CO₂were further investigated by comparison of both the FTIR and ¹³C NMR spectra of the gas-untreated and gas-treated materials to support the experimental and the theoretical results.

Moreover, the synthesized ionic liquid could be recycled under vacuum at 100°C.

References

[1] J. L. Anthony, E. J. Maginn, J. F. Brennecke, J. Phys. Chem. B 2002, 106, 7315-7320.

[2] L. A. Blanchard, D. Hancu, E. J. Beckman, J. F. Brennecke, Nature 1999, 399, 28-29.

[3] Z. Xue, Z. Zhang, J. Han, Y. Chen, T. Mu, International Journal of Greenhouse Gas Control 2011, 5, 628-633.

[4] J. M. Zhang, S. J. Zhang, K. Dong, Y. Q. Zhang, Y. Q. Shen, X. M. Lv, Chem.-Eur. J. 2006, 12, 4021-4026.

[5] Y. Zhang, S. Zhang, X. Lu, Q. Zhou, W. Fan, X. Zhang, Chemistry - A European Journal 2009, 15, 3003-3011.