Designing of anion‐functionalized ionic liquids for efficient capture of SO2 from flue gas. Issue 6 (27th March 2015)

• Record Type: Journal Article
• Authors: Chen, Kaihong; Lin, Wenjun; Yu, Xini; Luo, Xiaoyan; Ding, Fang; He, Xi; Li, Haoran; Wang, Congmin
• Is Part Of: AIChE journal. Volume 61:Issue 6(2015:Jun.)
• Page Start: 2028
• Page End: 2034
• Publication Date: 2015-03-27
• Subjects: Chemical engineering -- Periodicals; Génie chimique -- Périodiques; 660.28
• DOI: 10.1002/aic.14793
• Languages: English
• ISSNs: 0001-1541

Abstract

<abstract abstract-type="main"> <title> <x xml:space="preserve">Abstract</x> </title> <p>Five kinds of anion‐functionalized ionic liquids (ILs) with different basicity and substituent were selected, prepared and applied in the capture of SO₂ from flue gas, where the concentration of SO₂ is only 2000 ppm. The effect of the anion on SO₂ absorption capacity, desorption residue, and available absorption capacity under 2000 ppm was investigated. The relationship between available absorption capacity and absorption enthalpy was also studied. Through a combination of thermodynamic analysis and quantum calculation, the results indicated that the effect of the cation in the IL on absorption enthalpy was significant. However, the effect of chain length in the cation was weak. Hence, a new IL with low molecular weight, [P₄₄₄₂][Tetz], was further designed and applied for the capture of SO₂, which shows the high absorption capacity of 0.18 g SO₂ per g IL and excellent reversibility for 2000 ppm SO₂. © 2015 American Institute of Chemical Engineers <italic>AIChE J</italic>, 61: 2028–2034, 2015</p> </abstract>