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The Study on the Thermodynamic Properties of Ionic Liquids-Triethanolamine Lactic Acid+H2O/Alcohol as New Working Pairs

Author: ZhaoYongMing
Tutor: ZhaoZongChang
School: Dalian University of Technology
Course: Chemical Engineering
Keywords: Heat pump working pairs Ionic liquids Triethanolamine lactate Thermodynamic Properties Thermodynamic model
CLC: O642.3
Type: Master's thesis
Year: 2011
Downloads: 79
Quote: 0
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Abstract


The heat pump technology is attracting much attention in recent years within the energy-saving technologies , it has a simple , efficient, energy-saving , environmental protection and other advantages . With the development of the national economy , the state of the deep-seated need to promote energy saving and environmental protection technology attitudes and adjustment of energy structure , the heat pump technology being more and more attention . Seek heat pump technology breakthrough key is the quality of the new work on research and development . The ionic liquid is a new green solvents , with adjustable degeneration, selective , and good physical and chemical and thermodynamic properties . Novel Ionic Liquid - triethanolamine lactate (Triethanolamine Lactic acid [TEA] [LA]) and H2O , C2H5OH , CH3OH binary system consisting of the vapor pressure of the solution were measured , constant temperature and pressure heat of mixing and constant temperature and pressure . heat capacity and thermodynamic data . Laboratory synthesis of ionic liquids [ TEA ] [ LA ] bubble point method , determination of ionic liquid [ TEA ] [ LA ] three binary systems with H2O , C2H5OH , CH3OH solution at different ionic liquid concentration at different temperatures vapor pressure data , the data show its vapor pressure presented Roault law negative deviation ( in the conditions of high concentration of the ionic liquid methanol solution system law of Roault showing positive deviation ) ; using NRTL equation model to correlate the three binary systems solution gas-liquid balance data , obtained by fitting the model parameters : three binary systems of the experimental data with the NRTL equation model to calculate the average relative deviation of the data were 1.40% , 1.69% and 0.74 % , NRTL activity coefficient model can be used with ion a liquid solution of the gas-liquid equilibrium data association ; experimentally measured molar concentration of the ionic liquid were 0.20,0.35,0.50,0.65 three solution thermal data in the 28 ° C when mixed , the experimental data show that the process of a mixture of ionic liquid and water significant thermal effect, with a mixture of alcohols compared to the endothermic process . By measuring the specific heat Cp three binary systems containing ionic liquid solution , the three solutions Cp value increases linearly with increasing temperature . In summary , the ionic liquid [ TEA ] [ LA ] with H2O constitute the binary system solution has potential as a heat pump work quality .

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CLC: > Mathematical sciences and chemical > Chemistry > Physical Chemistry ( theoretical chemistry ),chemical physics > Chemical thermodynamics, thermochemistry, thermodynamic equilibrium > Thermochemical
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