IS cycle에서의 [DMIm]MeSO4를 이용한 SO2/O2 분리

Abstract

The feasibility of ionic liquid as a novel absorbent of SO2 for the separation of SO2 from SO2/O2 mixture in the thermochemical IS(Iodine-Sulfur) cycle was investigated. 1,3-dimethylimidazolium methylsulfate ([DMIm]MeSO4) had shown twenty five times higher solubility of SO2 than that of O2. The dependence of SO2 solubility by [DMIm]MeSO4 on temperature and SO2 partial pressure was examined , which confirmed the possibility of temperature and pressure swing for the separation process. Through cyclic absorption and desorption with temperature swing the stability of [DMIm]MeSO4 in the separation process was also demonstrated. As a result of the experiments carried out, SO2 separation from SO2/O2 mixture with ionic liquid([DMIm]MeSO4) can be applied to the thermochemical IS cycle.