Ether-Functionalized Ionic Liquids with Low Viscosity for Efficient SO2 Capture

详细信息    查看全文

• 作者：Luhong Zhang ; Zijian Zhang ; Yongli Sun ; Bin Jiang ; Xingang Li ; Xihui Ge ; Jiangtao Wang
• 刊名：Industrial & Engineering Chemistry Research
• 出版年：2013
• 出版时间：November 20, 2013
• 年：2013
• 卷：52
• 期：46
• 页码：16335-16340
• 全文大小：393K
• 年卷期：v.52,no.46(November 20, 2013)
• ISSN：1520-5045

文摘

Three kinds of ionic liquids (ILs) with ether-functionalized cations and bis(trifluoromethanesulfonyl)imide anions were synthesized in our laboratory, and the SO₂ absorption capacities of those three kinds of ILs were measured at temperature from 20 to 50 掳C and 1 bar. High capacity of SO₂, excellent reversibility, and high selectivity were achieved by the interaction between the ILs and SO₂. The absorption and desorption processes are very fast, and SO₂ can be removed completely from the ILs. Thermal stability was tested, and the decomposition temperatures of the three kinds of ILs were all higher than 420 掳C. NMR investigations and computer simulation studies also show that SO₂ absorption by these ILs is a physical process by forming weak hydrogen bonds between the oxygen atoms in the SO₂ and the hydrogen atoms in the ILs. This work further investigated how the water content affects the solubility of SO₂ in the ILs. These ILs exhibit significant improvements over traditional absorbents and indicate green, efficient, and energy-saving methods for industry applications in SO₂ separation.