Studies On Sulfur Dioxide Absorption In Dimethyl Sulfoxide + Tetraethylene Glycol System And Use For Preparation Of Alkonite Sulfate

According to China's basic national conditions,SO₂ is an important source of air pollution in China,which seriously threatens human health and economic development.According to China's"Twelfth Five-Year Plan",China's SO₂ emissions have decreased by18%during the"12th Five-Year Plan"period,but China's SO₂ emissions are still at a high level,and domestic SO₂ emissions are about 20 million tons/year.China's“Thirteenth Five-Year Plan”proposed that SO₂ emissions will be reduced by about 15%during the13th Five-Year Plan period.This is not an easy task for a developing country,so how can we effectively develop an economically repeatable and efficient use of SO₂ capture technology is imminent.Based on the comprehensive considerations of SO₂ absorption properties,TeEG?1?+?2?DMSO binary system as SO₂ absorption solvent.By measuring the gas-liquid equilibrium?GLE?data of the binary system,the SO₂ solubility was studied at different temperatures.The SO₂ absorption mechanism of this binary system were studied by ¹H-NMR,FTIR and fluorescence spectra and so on.The study found that between SO₂ molecules and TeEG?1?+?2?DMSO binary system had interaction forces.Through absorption and desorption circulation experiments,it was found that the absorption performance of SO₂ was not significantly affected after five cycles of experiments.At the same time,the basic data of density and viscosity were measured for this experiment at different temperatures.By calculating the excess molar volume?V_m^E?and viscosity deviation????,it found that the molar ratio of TeEG and DMSO was 1:1,the binding force was the strongest.In order to reach the purpose of resource utilization for SO₂ absorption,this research project adopted hydrothermal release method to use the absorbed SO₂ prepare inorganic material alkaline earth sulfate.By investigating the hydrothermal time,hydrothermal temperature,alkaline earth ion concentration and so on,the alkaline earth sulfates with rectangular rod,rhombus and flakes micro-morphologies were prepared.In the process of synthesizing alkaline earth sulphate,the formation mechanism of alkaline earth sulphate were studied by XRD,FTIR,TEM,SAED and so on.In summary,this novel method provided economical and environmentally friendly applications for the comprehensive utilization of SO₂ to synthetic alkaline earth sulfate.