CO<sub>2</sub>-[emim][Tf<sub>2</sub>N]二元混合体系超额混合焓的预测

何丽娟 1; 梁晶晶 1; 张少华 2

doi:10.7652/xjtuxb201509017

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CO₂-[emim][Tf₂N]二元混合体系超额混合焓的预测

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- CO₂-[emim][Tf₂N]二元混合体系超额混合焓的预测
- Prediction of Molar Excess Enthalpies in Binary Solution of CO₂-[emim][Tf₂N]
- 西安交通大学学报 2015年49卷第9期页码：99-104
- 作者机构：
  
  内蒙古科技大学能源与环境学院,内蒙古,包头,014010
- 作者简介：
- 基金信息：
  
  : 2014-12-11。作者简介: 何丽娟(1973—),女,博士,副教授。基金项目: 国家自然科学基金资助项目(51106068,51566014);内蒙古自然科学基金资助项目(2015MS0547)
- DOI：10.7652/xjtuxb201509017
  中图分类号： TB61
- 网络首发：2015-09-10，
  
  纸质出版：2015
- 稿件说明：
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何丽娟 1, 梁晶晶 1, 张少华 2. CO₂-[emim][Tf₂N]二元混合体系超额混合焓的预测[J]. 西安交通大学学报, 2015,49(9):99-104. DOI: 10.7652/xjtuxb201509017.

Prediction of Molar Excess Enthalpies in Binary Solution of CO₂-[emim][Tf₂N][J]. 2015, 49(9): 99-104. DOI: 10.7652/xjtuxb201509017.
何丽娟 1, 梁晶晶 1, 张少华 2. CO₂-[emim][Tf₂N]二元混合体系超额混合焓的预测[J]. 西安交通大学学报, 2015,49(9):99-104. DOI: 10.7652/xjtuxb201509017. DOI：

Prediction of Molar Excess Enthalpies in Binary Solution of CO₂-[emim][Tf₂N][J]. 2015, 49(9): 99-104. DOI: 10.7652/xjtuxb201509017. DOI：

摘要

针对传统制冷工质对存在诸如氢氟烃的环境问题、氨水的毒性和精馏问题

以及溴化锂制冷温度高和腐蚀结晶等问题

提出一种对环境友好的以CO

为制冷剂与以离子液体[emim

]

[Tf

]

为吸收剂的新型吸收制冷工质对。为了研究CO

-[emim

]

[Tf

]

吸收制冷系统性能

以WS混合规则为桥梁

结合PR状态方程和NRTL活度系数模型

建立G

-EOS热力学模型

得到CO

和离子液体二元混合体系在高温高压下的超额混合焓。计算结果表明:CO

液相摩尔分数大于0.43时

二元混合体系的超额混合焓均为负值

混合为放热过程

说明二元混合体系具有成为吸收制冷工质对溶液的基本特征。同时

利用CO

-[emim

]

[Tf

]

吸收制冷系统进行初步实验研究

实验结果表明

系统制冷系数平均相对误差为16.3%

验证了模型具有较好的计算精度。

Abstract

In view of the facts that traditional refrigerants may cause some problems

e.g.

hydroflurocarbon results in environmental problems; ammonia water has toxicity and needs distillation; lithium bromide-water solution has the problems of corrosion and crystallization and its refrigeration temperature is relatively high etc.

a new absorption refrigeration working pair has been developed. To study the performances of this absorption refrigeration system

NRTL model and PR state equation are combined using WS mixing rule as the link to develop a G

-EOS thermodynamic model in the paper. The molar excess e

nthalpies of the binary solution were obtained at high pressure and temperature. The calculation results showed that the excess molar enthalpies in the binary solution are negative when the CO

mole fraction in the liquid phase is higher than 0.43

so the mixing process of CO

and [emim

]

[Tf

]

is exothermic

which indicates that the binary solution has the basic properties of absorption refrigeration working pair. Meanwhile

experimental study was performed using an [emim

]

[Tf

]

absorption refrigeration system. The experimental results showed that the relative deviations were 16.3%

verifying the calculation accuracy of this model.

关键词

Keywords

references

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Prediction of Molar Excess Enthalpies in Binary Solution of CO2-[emim][Tf2N]

DOI：10.7652/xjtuxb201509017

摘要

Abstract

关键词

Keywords

references

CO₂-[emim][Tf₂N]二元混合体系超额混合焓的预测

Prediction of Molar Excess Enthalpies in Binary Solution of CO₂-[emim][Tf₂N]