Hong, Sung Yun Kim, Heehwan Kim, Young Jin Jeong, Junkyo Cheong, Minserk Lee, Hyunjoo Kim, Hoon Sik Lee, Je Seung 2024-01-20T10:33:42Z 2024-01-20T10:33:42Z 2021-09-05 2014-01-15 0304-3894 https://pubs.kist.re.kr/handle/201004/127221 Three different types of nitrile-functionalized amines, including 3-(N,N-diethylamino)propionitrile (DEAPN), 3-(N,N-dibutylamino)propionitrile (DBAPN), and N-methyl-N,N-dipropionitrile amine (MADPN) were synthesized, and their SO2 absorption performances were evaluated and compared with those of hydroxy-functionalized amines such as N,N-diethyl-N-ethanol amine (DEEA), N,N-dibutyl-N-ethanol amine (DBEA), and N-methyl-N,N-diethanol amine (MDEA). Absorption-desorption cycle experiments clearly demonstrate that the nitrile-functionalized amines are more efficient than the hydroxy-functionalized amines in terms of absorption rate and regenerability. Computational calculations with DBEA and DBAPN revealed that DBEA bearing a hydroxyethyl group chemically interacts with SO2 through oxygen atom, forming an ionic compound with a covalently bound -OSO2- group. On the contrary, DBAPN bearing a nitrile group physically interacts with SO2 through the nitrogen and the hydrogen atoms of the two methylene groups adjacent to the amino and nitrile functionalities. (C) 2013 Elsevier B.V. All rights reserved. English ELSEVIER SCIENCE BV SULFUR-DIOXIDE ABSORPTION IONIC LIQUIDS FLUE-GAS INFRARED-SPECTRA ORGANIC-BASES REMOVAL CAPTURE FGD CO2 DESULFURIZATION Nitrile-functionalized tertiary amines as highly efficient and reversible SO2 absorbents Article 10.1016/j.jhazmat.2013.11.026 1 JOURNAL OF HAZARDOUS MATERIALS, v.264, pp.136 - 143 JOURNAL OF HAZARDOUS MATERIALS 264 136 143 scie scopus 000331021200017 2-s2.0-84888409937 Engineering, Environmental Environmental Sciences Engineering Environmental Sciences & Ecology Article SULFUR-DIOXIDE ABSORPTION IONIC LIQUIDS FLUE-GAS INFRARED-SPECTRA ORGANIC-BASES REMOVAL CAPTURE FGD CO2 DESULFURIZATION SO2 Absorbent Amine Nitrile Recycle