Reversible absorption of SO2 with alkyl-anilines: The effects of alkyl group on aniline and water

Authors
Huyen Thanh VoCho, Shin HyeLee, UngJae, JunghoKim, HonggonLee, Hyunjoo
Issue Date
2019-01
Publisher
한국공업화학회
Citation
Journal of Industrial and Engineering Chemistry, v.69, pp.338 - 344
Abstract
SO2 absorption behaviours of N,N-dimethylaniline (DMA), N,N-diethylaniline (DEA), N,N-dibutylaniline (DBA), and N-methyldiphenylamine (MDPA) - were investigated in dry and wet conditions. DMA showed the highest SO2 absorption capacity of 1.5 mol(SO2) mol(Absorbent)(-1) in dry condition, while DBA showed the highest capacity of 1.75 mol(SO2)mol(Absorbent)(-1) in wet condition. Raman analyses revealed that anilines captured SO2 by forming charge transfer complexes in dry condition and the interaction between SO2 and aniline decreased as the steric hindrance of alkyl aniline increased. In contrast, bisulfite-based acid-base salt was formed in the presence of water, and the capacity increased with an increasing basicity of the alkyl aniline. (C) 2018 The Korean Society of Industrial and Engineering Chemistry. Published by Elsevier B.V. All rights reserved.
Keywords
SULFUR-DIOXIDE; ADSORPTION; REMOVAL; AIR; ANTIOXIDANT; HYDROXIDE; MIXTURES; SO2; Absorbent; Aniline; Charge transfer complex; Acid-base salt; Reversibility
ISSN
1226-086X
URI
https://pubs.kist.re.kr/handle/201004/120552
DOI
10.1016/j.jiec.2018.09.033
Appears in Collections:
KIST Article > 2019
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