| 硅橡胶复合膜用于渗透蒸发的膜传质动力学(Ⅱ)膜内的扩散传质 |
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| 作者姓名： | 李磊 肖泽仪 蒲亮 张志炳 |
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| 作者单位： | 南京大学化学化工学院 |
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| 基金项目： | 国家自然科学基金(No.20176030)，江苏省自然科学基金(No.BK2001037)资助项目. |
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| 摘 要： | The pervaporation of organics from dilute aqueous solution through a novel plate composite silicone rubber membrane was investigated. The measured and derived data indicated that the composite membrane possessed very high permeation flux and stable selectivity for dilute organic aqueous solution. Based upon the well- known resistance-in- series model, diffusive mass transfer behavior in membrane was investigated by calculation from the measured data with different skin layer thickness of membranes. The experimental results showed that the diffusive mass transfer coefficient conformed to Arrhenius correlation with temperature and was independent of the flow status. The diffusivities of the given alcohols in membrane had an order of magnitude 10 m-10·s-1 at a wider range of temperature, which is similar to those reported in literatures.
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| 关 键 词： | 硅橡胶复合膜 渗透蒸发 膜传质动力学 扩散传质 稀有机物－水溶液 扩散系数 |
| 文章编号： | 0438-1157(2002)12-1315-05 |
| 修稿时间： | 2002-07-23 |
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