| 状态方程模拟醇胺系统的密度和汽液相平衡 |
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| 引用本文： | 何清,李进龙,何昌春,彭昌军,刘洪来.状态方程模拟醇胺系统的密度和汽液相平衡[J].化工学报,2010,61(4):812-819. |
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| 作者姓名： | 何清 李进龙 何昌春 彭昌军 刘洪来 |
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| 作者单位： | 华东理工大学化学系，化学工程国家重点实验室，上海 200237 |
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| 基金项目： | 国家自然科学基金，科技部科研项目 |
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| 摘 要： | 通过考虑醇胺分子间的缔合作用,结合先前开发的非缔合变阱宽链流体状态方程(SWCF-VREOS)建立了一个缔合方阱链流体状态方程,并利用方程模拟了醇胺系统的密度和汽液相平衡。通过关联不同温度下醇胺的饱和蒸气压和液体体积得到了18种醇胺流体的分子参数,新方程计算的饱和蒸气压和液体密度总的平均误差分别为0.94%和0.88%。结合简单的混合规则,将此方程扩展到混合系统。研究发现,建立的方程可预测二元和三元醇胺混合物的密度。当引入一个与温度无关的可调参数时,方程能满意关联二元系统的汽液相平衡数据,并可进一步预测多元混合系统的汽液相平衡,预示着新方程可模拟醇胺系统的相行为。
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| 关 键 词： | 状态方程 醇胺 汽液平衡 密度 |
| 收稿时间： | 2009-12-7 |
| 修稿时间： | 2010-1-21
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Modeling of density and vapor-liquid equilibrium for alcohol-amine systems with equation of state |
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| HE Qing,LI Jinlong,HE Changchun,PENG Changjun,LIU Honglai.Modeling of density and vapor-liquid equilibrium for alcohol-amine systems with equation of state[J].Journal of Chemical Industry and Engineering(China),2010,61(4):812-819. |
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| Authors: | HE Qing LI Jinlong HE Changchun PENG Changjun LIU Honglai |
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| Abstract: | Considering the association contribution,the equation of state for square-well chain fluid with variable range(SWCF-VR EOS)in a previous work was extended for calculations of density and vapor-liquid equilibrium(VLE)of alcohol-amines.New molecular parameters of 18 alcohol-amines were obtained by fitting saturated vapor pressures and liquid densities at different temperatures.The overall average deviations of saturated vapor pressure and liquid density were only 0.94% and 0.88% respectively.Coupling with a simple mixing rule,the model was further applied to mixtures.The results show that the densities of binary and ternary alcohol-amine mixtures are satisfactorily predicted.Using an adjustable parameter independent of temperature,VLE data of binary alcohol-amine mixtures are well correlated.The model can reproduce phase behavior of multi-component mixtures,indicating that the new equation of state is appropriate for modeling phase behavior of alcohol-amine systems. |
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| Keywords: | equation of state alcohol-amine vapor-liquid equilibrium density |
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