| Phase equilibria of supercritical CO_2-ethanol-stearic acid ternary system and hydrogen bonding between ethanol and stearic acid |
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| 引用本文： | 关冰,鲁洁,韩布兴,闫海科. Phase equilibria of supercritical CO_2-ethanol-stearic acid ternary system and hydrogen bonding between ethanol and stearic acid[J]. 中国科学B辑(英文版), 1998, 0(4) |
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| 作者姓名： | 关冰 鲁洁 韩布兴 闫海科 |
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| 作者单位： | Institute of Chemistry，Chinese Academy of Sciences，Beijing 100080，China |
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| 基金项目： | heNationalNaturalScienceFoundationofChina (GrantNo .2 96 330 2 0 ) |
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| 摘 要： | Ｓｕｐｅｒｃｒｉｔｉｃａｌｆｌｕｉｄｓ(ＳＣＦｓ)ｈａｖｅｍａｎｙｆｅａｔｕｒｅｓｓｕｃｈａｓｈｉｇｈｄｉｆｆｕｓｉｖｉｔｙ,ｌｏｗｖｉｓｃｏｓｉｔｙ,ａｎｄｈｉｇｈｃｏｍｐｒｅｓｓｉｂｉｌｉｔｙ.Ｔｈｅｓｅｍａｋｅｔｈｅｍａｔｔｒａｃｔｉｖｅｓｏｌｖｅｎｔｓｆｏｒｍａｎｙｉｎｄｕｓｔｒｉａｌｐｒｏｃｅｓｓｅｓ.Ｓｕｐｅｒｃｒｉｔｉｃａｌ(ＳＣ)ＣＯ2ｉｓｔｈｅｍｏｓｔｐｏｐｕｌａｒａｍｏｎｇｔｈｅｍ,ｂｅｃａｕｓｅｉｔｉｓｎｏｎｔｏｘｉｃ,ｎｏｎｆｌａｍｍａｂｌｅ,ｅａｓｙｔｏｏｂｔａｉｎ,ａｎｄｈａｓａ…
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Phase equilibria of supercritical CO_2-ethanol-stearic acid ternary system and hydrogen bonding between ethanol and stearic acid |
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| GUAN Bing,LU Jie,HAN Buxing and YAN Haike. Phase equilibria of supercritical CO_2-ethanol-stearic acid ternary system and hydrogen bonding between ethanol and stearic acid[J]. Science in China(Chemistry), 1998, 0(4) |
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| Authors: | GUAN Bing LU Jie HAN Buxing YAN Haike |
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| Abstract: | Solubility of stearic acid in supercritical CO 2 with ethanol cosolvent was determined at 308.15 K in the pressure range from 8 to 16 MPa, and the cosolvent concentration ranges from 0 mol% to 4 mol%. The corresponding densities of the fluid phases were also measured. It was observed that ethanol enhances the solubility significantly. The solubility increases with pressure noticeably at lower pressure, especially at lower cosolvent concentrations. The effect of pressure on the solubility is very limited at higher pressures or higher cosolvent concentrations. The hydrogen bonding between ethanol and stearic acid in supercritical CO 2 was also studied using FTIR in order to understand the mechanism of the solubility enhancement by ethanol. |
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| Keywords: | phase equilibria supercritical CO 2 stearic acid ethanol hydrogen bonding. |
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