| 加压和超临界条件下乙醇分子的缔合 |
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| 引用本文： | 刘丽丽,张宝泉,刘秀凤. 加压和超临界条件下乙醇分子的缔合[J]. 化工学报, 2006, 57(6): 1274-1276 |
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| 作者姓名： | 刘丽丽 张宝泉 刘秀凤 |
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| 作者单位： | 天津大学化工学院,天津,300072;天津大学化工学院,天津,300072;天津大学化工学院,天津,300072 |
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| 基金项目： | 高等学校博士学科点专项科研项目 |
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| 摘 要： | 引言 在化学和化工领域,分子扩散系数是过程设计和装置优化所需的基本数据之一[1].乙醇作为一种高效绿色溶剂,具有良好的溶剂性能和比较温和的临界温度、临界压力(Tc=514.3 K,pc=6.38MPa),在食品、医药和化工等领域有巨大的应用空间[2].
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| 关 键 词： | 扩散系数 超临界乙醇 分子缔合作用 |
| 文章编号： | 0438-1157（2006）06-1274-03 |
| 收稿时间： | 2006-02-08 |
| 修稿时间： | 2006-02-082006-03-07 |
Association of ethanol molecules under compressed and supercritical conditions |
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| LIU Lili,ZHANG Baoquan,LIU Xiufeng. Association of ethanol molecules under compressed and supercritical conditions[J]. Journal of Chemical Industry and Engineering(China), 2006, 57(6): 1274-1276 |
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| Authors: | LIU Lili ZHANG Baoquan LIU Xiufeng |
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| Affiliation: | School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China |
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| Abstract: | The diffusion coefficient of naphthalene in supercritical ethanol was measured at 519-534 K and 6.5-16.2 MPa by using the Taylor dispersion technique. The association factor of ethanol molecules was estimated according to the measured experimental data and the infinite diffusion coefficients of naphthalene in high-pressure ethanol published previously. It was shown that the association factor was only a function of temperature varying between 1.8 and 2.8 for liquid and supercritical ethanol. However, the association factor remarkably changed with pressure at the near-critical region of ethanol, reaching a maximum up to 14. |
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| Keywords: | diffusion coefficient supercritical ethanol molecular association |
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