Hydrodynamic Instabilities Driven by Acid-base Neutralization Reaction in Immiscible System

被引：6

作者：

Asad, Ahmed ^{[1
]}

Yang, Ya-hui ^{[1
]}

Chai, Chuan ^{[1
]}

Wu, Jiang-tao ^{[1
]}

机构：

[1] Xi An Jiao Tong Univ, State Key Lab Multiphase Flow Power Engn, Xian 710049, Peoples R China

来源：

CHINESE JOURNAL OF CHEMICAL PHYSICS | 2010年 / 23卷 / 05期

基金：

中国国家自然科学基金;

关键词：

Fluid dynamics; Convective transport; Diffusion; Interface; Mass transfer; Chemical reactor; AUTOCATALYTIC REACTION FRONT; HELE-SHAW CELL; CHEMICAL-REACTION; LIQUID EXTRACTION; PATTERN-FORMATION; CONVECTION; INTERFACE; GROWTH; WAVES; DENSITY;

D O I：

10.1088/1674-0068/23/05/513-520

中图分类号：

O64 [物理化学（理论化学）、化学物理学]; O56 [分子物理学、原子物理学];

学科分类号：

070203 ; 070304 ; 081704 ; 1406 ;

摘要：

The hydrodynamic instabilities driven by an acid-base neutralization reaction, in contact along a plane interface, placed in a Hele-Shaw cell under the gravitational field are reported. The system consists of the heavier aqueous tetramethyle-ammonium hydroxide below the lighter layer of organic phase with propionic acid as reacting specie. The effect of chemical composition on hydrodynamic instabilities during interfacial mass transfer accompanied by a neutralization reaction is investigated. Depending on the initial concentration of the reacting species, Marangoni convection in the form of roll cells or trains of waves is observed. Mach-Zehnder interferometer is used to measure the change in base concentration at the time of instability formation. The results show that the instabilities resulted from the convection flow are more efficient to the mechanism of mass transfer and can drastically alter pattern formation in the system.

引用

页码：513 / 520

页数：8

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