New experimental data for absorption of SO 2 into DMA solution

Removal of SO 2 and its accurate prediction from the flue gases emitted from various chemical industries in a techno‐econo‐enviro manner is of great importance. The experiments were conducted in a bubble column to study the absorption of SO 2 into dimethyl amine (DMA) solution from simulated gas stream as absorption of SO 2 in DMA solution yields an ionic liquid. The effects of DMA concentration, initial SO 2 concentration, absorbent temperature, and the initial pH value of absorbent on SO 2 removal were investigated by using DMA solution. The experimental results showed that the SO 2 saturation uptake increased with increase in absorbent concentration. The maximum removal efficiency of approximately 100% was observed at 9.32 mol/dm 3 DMA solution, temperature of 303 K and initial DMA solution pH 11. The mass transfer coefficient based on the liquid phase increases with increasing partial pressure of SO 2 in inlet gas stream. The lethal air pollutant SO 2 is an acidic gas emitted from combustion of fossil fuel. The removal of SO 2 from flue gas streams was investigated through absorption by using an organic solvent DMA. Absorption of SO 2 into DMA gives di‐methyl ammonium N,N‐dimethyl amidosulfinate an ionic liquid. The absorption of SO 2 using DMA has dual benefits in terms of resource generation as ionic liquid production resulting in omission of absorbent regeneration step and SO 2 emission control from waste gas stream. The value of k L a increases with increasing partial pressure of SO 2 in inlet gas stream. The DMA showed an excellent performance on SO 2 absorption. © 2016 American Institute of Chemical Engineers Environ Prog, 35: 1298–1304, 2016