ESTABLISHMENT OF NEW LIQUID DIFFUSIVITY MODEL

杨晓宁; 马沛生; 陈洪钫

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ESTABLISHMENT OF NEW LIQUID DIFFUSIVITY MODEL

更新时间：2025-12-16

- ESTABLISHMENT OF NEW LIQUID DIFFUSIVITY MODEL
- CIESC Journal Issue 5, (1994)
- 作者机构：
  
  天津大学化工系,天津大学化工系,天津大学化工系天津 300072,天津 300072,天津,300072
- 作者简介：
- 基金信息：
- DOI：
  CLC： Q018
- Online First：25 October 1994，
  
  Published：25 October 1994
- 稿件说明：
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杨晓宁, 马沛生, 陈洪钫. ESTABLISHMENT OF NEW LIQUID DIFFUSIVITY MODEL[J]. CIESC Journal, 1994, (5).
DOI：

杨晓宁, 马沛生, 陈洪钫. ESTABLISHMENT OF NEW LIQUID DIFFUSIVITY MODEL[J]. CIESC Journal, 1994, (5). DOI：

摘要

根据统计力学理论与Eyring绝对速率理论

建立了描述液相扩散系数的理论模型。该模型反映了温度、压力及组成对液相扩散系数的影响。基于此模型

建立了关联高压液相自扩散系数与密度关系的模型方程;导出了二元溶液相互扩散系数与浓度关系的计算方程;建立了计算无限稀释扩散系数的方程。通过对实际物系的验证计算

本文所导出的各方程均能很好地关联计算液相扩散系数

并优于文献方程。

Abstract

On the basis of the fundamental theory of statistical mechanics and Eyrings absolute rate theory

a general theoretical model for the description of liquid diffusivity was developed. In this model

the influences of temperature

pressure and composition on liquid diffusivity were comprehensively considered. From the model:① an equation which can be used to correlate liquid self - diffusivity under high pressure was obtained

② a new equation was derived to calculate the mutual diffusivity at different concentrations in binary solutions

③a general equation was developed for calculating the diffusivity at infinite dilution. All these equations were applied to practical liquid systems and the calculating results showed that the equations proposed has a higher accuracy in calculating liquid diffusivity than those of literature.

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