Simulation on Diffusion Processes of Multicomponent Gas Mixture in Typical Porous Media

您当前的位置：

首页 >

文章列表页 >

Simulation on Diffusion Processes of Multicomponent Gas Mixture in Typical Porous Media

更新时间：2025-07-09

- Simulation on Diffusion Processes of Multicomponent Gas Mixture in Typical Porous Media
- Vol. 46, Issue 3, Pages: 107-112(2012)
- 作者机构：
  
  西安交通大学热流科学与工程教育部重点实验室,西安,710049
- 作者简介：
- 基金信息：
- DOI：
  CLC： O121.8;G558
- Online First：10 March 2012，
  
  Published：2012
- 稿件说明：
移动端阅览
Simulation on Diffusion Processes of Multicomponent Gas Mixture in Typical Porous Media[J]. 2012, 46(3): 107-112.
DOI：

Simulation on Diffusion Processes of Multicomponent Gas Mixture in Typical Porous Media[J]. 2012, 46(3): 107-112. DOI：

摘要

为研究孔径大小对扩散过程的影响及组分之间在扩散过程中的相互作用

采用Maxwell-Stefan模型对混合气体在典型多孔介质内的扩散过程进行了数值模拟.首先引用前人的实验结果验证了该模型及数值方法的可靠性.在此基础上

采用该模型研究了孔径大小对CH

/Ar二元混合气体在多孔介质内扩散过程的影响

以及CH

/Ar/H

三元混合气体在多孔介质内扩散过程中各组分之间的相互作用.研究表明:当孔半径小于0.5 μm时

/Ar的扩散过程随孔半径的增大而加快

当孔半径大于0.5 μm时

/Ar的扩散过程不受孔半径的影响; 当不同组分之间的相互拖带作用大于自身的浓度梯度作用时

可能产生逆向扩散、局部压力回升现象; 小分子较大分子扩散得快; Maxwell-Stefan模型能够有效地模拟多元混合气体的扩散过程.

Abstract

The diffusion processes of gas mixture in typical porous media were simulated by the Maxwell-Stefan model to study the effect of pore radius on the diffusion process and the interaction between each species of multicomponent during diffusion in porous media. The model and the numerical method adopted here were verified by the experimental data in literature. Then the effect of pore radius was examined on the diffusion process of CH

/Ar mixture and the interaction between CH

/Ar/H

during diffusion in porous media. The results show that the diffusion of CH

/Ar will rise with an increase in the pore radius when it is smaller than 0.5 μm while the diffusion process is independent on the pore radius when it is larger than

0.5 μm. Moreover

the adverse diffusion may occur when the dragging effect is stronger than the concentration gradient effect. In addition

species with small molecules diffuse faster than those with big molecules. These results imply that the Maxwell-Stefan model can describe the diffusion process of multicomponent gas mixture efficiently.

关键词

Keywords

references

DUNCAN J B, TOOR H L. An experimental study of three component gas diffusion [J]. AIChE Journal, 1962, 8(1): 38-41.

TAYLOR R, KRISHNA R. Multicomponent mass transfer [M]. New York, USA: Wiley, 1993.

CARTY R, SCHRODT T. Concentration profiles in ternary gaseous diffusion [J]. Industrial Engineering Chemistry Fundamentals, 1975, 14(3): 276-278.

DUNCAN J B, TOOR H L. An experimental study of three component gas diffusion [J]. AIChE Journal, 1962, 8(1): 38-41.

KRISHNA R, STANDART G. Mass and energy transfer in multicomponent systems [J]. Chemical Engineering Communications, 1979, 3(4): 201-275.

KRISHNA R, WESSELINGH J A. The Maxwell-Stefan approach to mass transfer [J]. Chemical Engineering Science, 1997, 52(6): 861-911.

DO D D. Adsorption analysis-equilibria and kinetics [M]. London, UK: Imperial College Press, 1998.

KRISHNA R. A unified approach to the modelling of intraparticle diffusion in adsorption processes [J]. Gas Separation Purification, 1993, 7(2): 91-104.

DO H D, DO D D. Maxwell-Stefan analysis of multicomponent transient diffusion in a capillary and adsorption of hydrocarbons in activated carbon particle [J]. Chemical Engineering Science, 1998, 53(6): 1239-1252.

BIRD R B, STEWART W E, LIGHTFOOT E N. Transport phenomena [M]. 2nd ed. New York, USA: Wiley, 2002.

POLING B E, PRAUSNITZ J M, O'CONNELL J P. The properties of gases and liquids [M]. New York, USA: McGraw-Hill, 2001.

陶文铨. 数值传热学 [M]. 2版. 西安: 西安交通大学出版社, 2001.

DO D. Dynamics of adsorption in heterogeneous solids [J]. Studies in Surface Science and Catalysis, 1997, 104: 777-835.

微米级通道内油水两相流阻力特性研究. 2011,45(11): 11-15.

温度对质子交换膜扩散性能影响的分子动力学模拟. 2011,45(7):1-4.

高压高浓度CO2烟气辐射换热特性分析与计算. 2011,45(5):17-22.

高压气体在膜式螺旋管环形通道中的对流换热特性. 2010,44(11):17-21.

室温磁制冷活性蓄冷器多孔介质模型及其数值模拟. 2009,43(3):31-35.

Views

下载量

CSCD

Alert me when the article has been cited

提交

Tools

Publicity Resources

Numerical Study on Effects of Pin Fin with Porous Medium on Performance of Double-Wall Cooling System

3D Numerical Simulation on Bypass Flow in Pebble-Bed High-Temperature Gas-Cooled Reactor

Influence of Structural Parameters on the Summer Operational Characteristics of a Three-Tower-in-One Indirect Air-Cooling System

Effects of Expansion Angle Crater Film Hole on the Film Cooling Characteristics of a Double-Wall Structure

Energy Efficiency Optimization of the Cryogenic Air Separation Process for Electronic-Grade Ultra Pure Nitrogen

Related Author

WANG Yi

WANG Xiangyu

LI Jialong

HU Qingsong

FENG Zhenping

LIU Wei

SHI Jin

SHAO Jikai

Related Institution

School of Energy and Power Engineering, Xi'an Jiaotong University

Shaanxi Engineering Laboratory of Turbomachinery and Power Equipment

Huaneng Nuclear Energy Technology Research Institute

MOE Key Laboratory of Thermo-Fluid Science and Engineering, Xi'an Jiaotong University

⁰