期刊
GREEN CHEMISTRY
卷 15, 期 8, 页码 2261-2265出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c3gc40815a
关键词
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资金
- National Natural Science Foundation of China [21133009, U1232203, 21021003]
- Chinese Academy of Sciences [KJCX2.YW.H16]
The utilization of cheap and renewable materials is an important topic in green chemistry. In this work we studied the absorption of SO2 by choline chloride (ChCl)-glycerol deep eutectic solvents (DESs) at various temperatures and SO2 partial pressures, and the molar ratios of ChCl and glycerol ranged from 1 : 4 to 1 : 1. It was demonstrated that the solubility of SO2 in the DESs increased as the ChCl concentration in the DESs increased. The SO2 absorption capacity of the DESs with a ChCl-glycerol molar ratio of 1 : 1 could be as high as 0.678 g SO2 per g DES at 20 degrees C and 1 atm. Moreover, the absorbed SO2 could be easily released, and their excellent properties of high absorption capacity and rapid absorption/desorption rates remained during the five consecutive absorption/desorption cycles. The Henry's constants of SO2 in the DESs were calculated based on the solubility data.
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