کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
216751 | 1426278 | 2011 | 8 صفحه PDF | دانلود رایگان |
In present research the binary solutions containing ionic liquid (IL), 1-ethyl-3-methylimidazolium dimethylphosphate ([EMIM] [DMP]), are considered as new working pairs for absorption heat pumps or absorption refrigerators. The IL was synthesized in the lab and mixed with water, ethanol, or methanol. Experimental (vapor + liquid) equilibrium (VLE) of these binary systems was measured at different mole fractions ranging from 0.1 to 0.5 and was correlated by the NRTL equation within the average relative deviation of 2%, which means that the (vapor + liquid) equilibrium of these binary solutions containing ionic liquid can be predicted by traditional non-electrolyte solution model. Meanwhile these binary solutions are a negative deviation from Raoult’s law. Excess enthalpy of these binary systems was measured at the temperature of T = 298.15 K and at the pressure of 1 atm. The results indicate that the mixing processes of [EMIM] [DMP] with water, ethanol, or methanol are exothermal, which is a very important characteristic for working pairs used in absorption heat pumps or in absorption refrigerators.
Research highlights
► Ionic liquid (IL), 1-ethyl-3-methylimidazolium dimethylphosphate ([EMIM] [DMP]), was synthesized and mixed with water, ethanol, or methanol.
► Experimental (vapor+liquid) equilibrium of these binary systems was measured at different mole faction and were correlated by the NRTL equation.
► These binary solutions are a negative deviation from Raoult’s law.
► Excess enthalpy of these binary systems was measured at the temperature of 298.15 K and at the pressure of 1 atm.
► These characteristic make them possible to be new working pairs in absorption heat pumps or absorption refrigerators.
Journal: The Journal of Chemical Thermodynamics - Volume 43, Issue 4, April 2011, Pages 576–583