Abstract
Porous liquid combines the two unrelated things of solid porosity and liquid fluidity, and has showed a great potential gas separation.CO2 diffusion plays an important role in CO2 absorption capacity and rate of porous liquids. In this study, the 2-Methylimidazole zinc salt(ZIF-8) with porous structure was chosen and dispersed into 1-ethyl-3-methy limidazolium bis[(trifluoromethyl)sulfonyl]imide ([EMIm][NTf2]) for synthesizing porous liquids. And then the density and viscosity of porous liquid were measured in different temperature, pressure and ZIF-8 mass concentration. In addition, based on the CO2 absorption experiment of porous liquid taken in a static CO2 absorption system and theoretical calculation, the pressure decay of the system was recorded and CO2diffusion coefficient was calculated to study the CO2 diffusion characteristics of porous liquid under different experimental parameters including ZIF-8 mass fraction, pressure and temperature.
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