| 盐对水─非电解质系统汽液平衡影响的推算 |
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| 引用本文： | 孙仁义. 盐对水─非电解质系统汽液平衡影响的推算[J]. 化学工程, 1995, 23(1): 13-17,30 |
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| 作者姓名： | 孙仁义 |
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| 摘 要： | 测定了盐（ＮａＣｌ，ＫＣｌ）─水─乙醇系统的等压（１００．８ｋＰａ）汽液平衡。并提出以三元系的Ｇｉｂｂｅ─Ｄｕｈｅｍ方程推算盐对汽液平衡的影响。以电解质─非电解质相互作用参数为唯一可调参数，参数值可由一个实验点测定，或由多个实验点拟合出最优值。此法在无盐汽液平衡基础上可自盐的浓度推算盐对汽液平衡的影响，在盐浓至饱和及乙醇浓度变化很大范围内，汽相组成及平衡温度的推算结果均与实验很好一致。
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| 关 键 词： | 电解质，非电解质，汽液平衡，活度系数，Gibbs─Duhem方程 |
CALCULATION OF SALTING EFFECT ON VAPOR-LIQUID EQUILIBRIUM IN WATER-NONELECTROLYTE SYSTBMS |
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| Abstract: | The experiments of isobaric VLE of (NaCl, KCl)-H_2O-alcohol system were carried out.Aternary Gibbs-Duhem equation was developed to eatimate Salting effect on the VLE.Only the interac-tion parameters of electrolyte-nonelectrolyte is adjustabie and its value can be determined by one ex-perimental point or the optimium value can be correldted by many experimental points. Based on thenon-salt VLE this method can be applied in calculatlon of salt effect on VLE. Between the saturatedsalt and within a wide region of concentration of alcohol,both calculated vapor composition and tem-porature are goed agreement with the experimental data. |
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| Keywords: | electrolyte nonelectrolyte vapor-liquid equilibrium activity coefficient Gibbs-Duhem e-quation |
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