| 利用纳米粒子强化微乳液体系HCFC141b 水合物的生成 |
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| 引用本文： | 李娜,马振魁.利用纳米粒子强化微乳液体系HCFC141b 水合物的生成[J].科学通报,2011,56(22):1846-1853. |
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| 作者姓名： | 李娜 马振魁 |
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| 作者单位： | 西安交通大学能源与动力工程学院化工系热流科学与工程教育部重点实验室; |
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| 摘 要： | 快速有效的促晶方法是实现气体水合物蓄冷技术的关键. 从增大一氟二氯乙烷(HCFC141b)和水的互溶度和相界面出发, 制备了HCFC141b 微乳液, 对比研究了HCFC141b微乳液和HCFC141b/水粗混合体系中的HCFC141b 水合反应诱导时间和过冷度, 分析了水合物生长特征; 在此基础上利用纳米粒子强化传热的特点, 考察了混合体系中添加纳米Cu 粒子和纳米Al2O3 粒子对水合反应的影响. 结果表明, 微乳液体系内快速均匀地生成大量水合物晶体, 水合反应诱导时间比在乳浊液和不含表面性剂的粗混合体系中分别缩短36%和52%. 将纳米粒子加入微乳液体系可降低反应过冷度, 但是对粗混合体系和乳浊液中的反应过冷度无影响. 微乳液体系内添加0.1 wt%纳米Cu 粒子后水合反应诱导时间缩短29%, 过冷度降低39%.将微乳液体系和纳米粒子相结合形成的纳米流体可有效促进制冷剂气体水合物的生成.
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| 关 键 词： | 气体水合物 微乳液 纳米粒子 水合反应 诱导时间 过冷度 |
| 收稿时间： | 2011-04-19 |
Nano-particle enhanced formation of HCFC141b gas hydrate in a microemulsion system |
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| LI Na & MA ZhenKui Key Laboratory of Thermo-Fluid Science , Engineering,Ministry of Education.Nano-particle enhanced formation of HCFC141b gas hydrate in a microemulsion system[J].Chinese Science Bulletin,2011,56(22):1846-1853. |
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| Authors: | LI Na & MA ZhenKui Key Laboratory of Thermo-Fluid Science Engineering Ministry of Education |
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| Institution: | LI Na & MA ZhenKui Key Laboratory of Thermo-Fluid Science and Engineering,Ministry of Education,Department of Chemical Engineering,School of Energy and Power Engineering,Xi'an Jiaotong University,Xi'an 710049,China |
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| Abstract: | Accelerating the formation of gas hydrate is of great significance for the application of gas hydrate technology in the area of cooling storage.To promote the rapid formation and growth of HCFC141b gas hydrate,the thermodynamically stable HCFC141b microemulsion was successfully prepared with aid of Tween 20/lecithin compound surfactants for increasing interface and compatibility between the refrigerant and water.The hydration process of HCFC141b in the microemulsion system was investigated in terms of induc... |
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| Keywords: | gas hydrate microemulsion nano-particles hydration induction time supercooling degree |
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