Preparation Of Ionic Liquids And Their Application In SO₂ And NO₂ Absorption

The study was to search for ionic liquid composite materials with effective absorption of SO₂ and NO₂.The efficiency of desulfurization and denitrification was explored in different temperatures and molar ratios.Fluorine ion selective electrode method.FT-IR,1NMR and Fluorine ion selective electrode method were used in lab.The result showed precision is 0.75%,selectivity coefficient of ion is 0.34,recovery is97.2%¹03.2%.Pycnometer method was used to show the heavier of HmimBF₄ than that of water.The density decreases with the increase of temperature and it is linearly dependent on temperature.The density and the molar ratio satisfy the cubic polynomial equation.The viscosity was measured by Pinker viscosimeter.Results showed that the viscosity of HmimBF₄ is in the range of 83.11¹97.58 mPa·s.The viscosity descends with the rises of temperature,it decreases first and then increase with the increase of molar ratio.When the molar ratio is 5:5,the min viscosity was between 20.33 and 58.88 mPa·s.The amount of absorption was measured.In the mole ratio of 5:5 and 45⁷0?condition,the lower the temperature with the greater absorption of SO₂ and the desorption arise with the increase of temperature.Under 45?and 1.013×10⁵ Pa,absorption of SO₂ is accomplished in 50 min and disorption is accomplished in 70?and 60 min.The absorption efficiency is still higher after repeated absorption.The absorption of NO₂ is high with the ratio of 2:8 in 45?and desorption occur with the rising of temperature,which is the same with absorption of SO₂.When x=0.3867,material can be implemented in smaller viscosity under relatively high uptake in45?optimized by MATLAB.