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The preparation and characterization of alumina membranes with ultra-fine pores : Part 3. The permeability for pure liquids

机译:具有超细孔的氧化铝膜的制备和表征:第3部分。纯液体的渗透性

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摘要

This paper reports on the permeability of alumina membranes with pore diameters of a few nanometers for pure liquids. It appears that the volume flux corrected for viscosity differences depends on the type of permeant. It decreases in the order water, hexane, ethanol, s-butanol. The hydraulic resistance defined as the reciprocal permeability) of supported membranes can be taken as the sum of the hydraulic resistance of the membrane and that of the support. This implies that the membrane material does not penetrate the pores of the support significantly. The Kozeny—Carman constant for alumina membranes calcined at 800°C amounts to 13.3±2. This value is much higher than the commonly found value of 5. This can be explained by taking into account the plate shape of the crystallites forming the membrane, resulting in a microstructure with a high value for the tortuosity.
机译:本文报道了纯液体的孔径为几纳米的氧化铝膜的渗透性。似乎校正了粘度差异的体积通量取决于渗透物的类型。按水,己烷,乙醇,仲丁醇的顺序减少。支撑膜的水力阻力定义为膜的水力阻力和支撑物的水力阻力之和。这意味着膜材料不会明显渗透载体的孔。在800°C下煅烧的氧化铝膜的Kozeny-Carman常数为13.3±2。该值比通常发现的5高很多。这可以通过考虑形成膜的微晶的板状来解释,从而得到具有高曲折度的微结构。

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  • 作者单位
  • 年度 1985
  • 总页数
  • 原文格式 PDF
  • 正文语种 {"code":"en","name":"English","id":9}
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