NON - EQUILIBRIUM-DISSOLUTION DIFFUSION MODEL OF PERVAPORATION

余立新; 蒋维钧

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NON - EQUILIBRIUM-DISSOLUTION DIFFUSION MODEL OF PERVAPORATION

更新时间：2025-12-16

- NON - EQUILIBRIUM-DISSOLUTION DIFFUSION MODEL OF PERVAPORATION
- CIESC Journal Issue 4, (1994)
- 作者机构：
  
  清华大学化工系!北京100084,清华大学化工系,北京,100084
- 作者简介：
- 基金信息：
- DOI：
  CLC： Q028
- Online First：25 August 1994，
  
  Published：25 August 1994
- 稿件说明：
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余立新, 蒋维钧. NON - EQUILIBRIUM-DISSOLUTION DIFFUSION MODEL OF PERVAPORATION[J]. CIESC Journal, 1994, (4).
DOI：

余立新, 蒋维钧. NON - EQUILIBRIUM-DISSOLUTION DIFFUSION MODEL OF PERVAPORATION[J]. CIESC Journal, 1994, (4). DOI：

摘要

目前，关于渗透蒸发膜过程的机理研究已有不少成果’‘－‘’，这些工作归纳起来就是（平衡）溶解－扩散模型．以聚乙烯醇膜分离乙醇－水体系为例，渗透蒸发过程中组分通过膜的传递可以分为3个步骤：、（）乙醇、水溶解到膜的表面并达到溶解平衡；（2）水和乙醇依靠浓度梯度扩散到膜的真空侧表面；（3）水和乙醇进入真空侧汽相．

Abstract

The concept of non - equilibrium dissolution in pervaporation is proposed on the basis of the solution -diffusion model of the membrane process. This is a supplement to the studies on pervaporation mechanism. A method for determination of the dissolution rate coefficient is developed and the coefficients of water and ethanol dissolving into the PVA membrane are measured by using this method.

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