Isothermal Vapor鈥揕iquid Equilibrium Measurements of 1,1-Difluoroethane + N,N-Dimethylformamide and N,N-Dimethylacetamide

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• 作者：Xuelin Meng ; Danxing Zheng ; Xinru Li ; Yanshu Shen
• 刊名：Journal of Chemical & Engineering Data
• 出版年：2013
• 出版时间：May 9, 2013
• 年：2013
• 卷：58
• 期：5
• 页码：1078-1085
• 全文大小：360K
• 年卷期：v.58,no.5(May 9, 2013)
• ISSN：1520-5134

文摘

Vapor鈥搇iquid equilibrium (VLE) data of working fluids play a vital role in the research and development of absorption refrigeration technology. In this paper, the VLE data of two new working fluids, 1,1-difluoroethane (R152a) + N,N-dimethylformamide (DMF) and R152a + N,N-dimethylacetamide (DMAC), were measured by the static analytical method at temperatures from (293.15 to 353.15) K. The experimental results show that R152a exhibits better solubility characteristics with DMF and DMAC, and the solubility of R152a in DMAC is slightly better than that in DMF. All experimental data were correlated by the activity coefficient model of five-parameter nonrandom two liquid (NRTL). The calculated results are in essential agreement with the experimental data, and the maximum relative deviation of pressure are 3.69 % and 3.51 %, the average relative deviation of pressure are 1.60 % and 1.11 %, for binary systems R152a + DMF and R152a + DMAC, respectively.