| 合金组元过量焓与真空蒸馏气液相平衡的关联 |
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| 引用本文： | 张行,杨红卫.合金组元过量焓与真空蒸馏气液相平衡的关联[J].有色金属工程,2020(5). |
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| 作者姓名： | 张行 杨红卫 |
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| 作者单位： | 昆明理工大学,昆明理工大学 |
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| 基金项目： | 国家自然科学基金项目（面上项目，重点项目，重大项目） |
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| 摘 要： | 基于Wilson方程，通过组元的摩尔体积和无限稀偏摩尔过量焓获得Wilson方程的相互作用参数，预测了Sn-X（X=Bi, Cd, Ga, Ge, In, Pb, 和 Sb）体系在5 Pa时的VLE（气-液平衡）相图。结果表明预测值与实验数据具有很好的一致性，在缺乏组元活度的情况下，该方法可以有效预测合金真空蒸馏的气液平衡，为粗金属的真空分离与提纯提供理论指导。
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| 关 键 词： | 无限稀偏摩尔过量焓 气-液平衡 真空蒸馏 Wilson方程 |
| 收稿时间： | 2019/10/28 0:00:00 |
| 修稿时间： | 2019/11/11 0:00:00 |
Correlation between Infinite-Dilution Partial Molar Excess Enthalpy and Vapor-Liquid Equilibrium of Sn-Based Binary Systems in Vacuum Distillation |
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| zhanghang and yanghongwei.Correlation between Infinite-Dilution Partial Molar Excess Enthalpy and Vapor-Liquid Equilibrium of Sn-Based Binary Systems in Vacuum Distillation[J].Nonferrous Metals Engineering,2020(5). |
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| Authors: | zhanghang and yanghongwei |
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| Affiliation: | Kunming University of Science and Technology,Kunming University of Science and Technology |
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| Abstract: | By means of molar volumes and infinite-dilution partial molar excess enthalpy of components, interaction parameters of the Wilson equation have been obtained. VLE (vapor-liquid equilibrium) phase diagrams of Sn-X (X=Bi, Cd, Ga, Ge, In, Pb, and Sb) systems at 5 Pa are modeled successfully based on the Wilson equation. The results indicate that the predicted values agree well with the experimental data. It shows that the method could provide effective prediction for the process of vacuum distillation of alloys and theoretical guides for separating and purifying crude metals in cases if the activities of components are not yet known. |
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| Keywords: | Infinite-dilution partial molar excess enthalpy vapor-liquid equilibria vacuum distillation Wilson equation |
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