Effect of Configuration on Mass Transfer in a Filter-press Type Electrochemical Cell  

Effect of Configuration on Mass Transfer in a Filter-press Type Electrochemical Cell

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作  者:徐红 黄卫民 邢艳 林海波 季洪海 姜梅 刘小波 甘树才 

机构地区:[1]College of Chemistry, Jilin University, Changchun 130012, China [2]Key Laboratory of Surface and Interface Chemistry of Jilin Province, Jilin University, Changchun 130012, China [3]College of Chemistry, Northeast Normal University, Changchun 130024, China

出  处:《Chinese Journal of Chemical Engineering》2008年第2期198-202,共5页中国化学工程学报(英文版)

基  金:Supported by the National Natural Science Foundation of China (20573045, 20843001), the "Tenth Five-Year" National Key Scientific and Technological Project (2004BA313B-17) and the National High Technology Research and Development Pro gram of China (2006AA06Z321).

摘  要:Effect of configuration (structure of electrode, interelectrode gap, positions of inlet and outlet, volume of the cell and additional nets) on mass transfer characteristic of a filter-press type electrochemical cell has been studied. The mass transfer coefficients on the electrodes were obtained by using the well-known technique based on the determination of limiting diffusion current. It is found that mass transfer coefficients with mesh electrode are greater than that of with plate electrode. Mass transfer coefficient is decreased with interelectrode gap. While interelectrode gap achieved a certain value (7 ram), mass transfer coefficient is steady, no more declining. Mass transfer characteristic for different positions of inlet and outlet are different and dimensionless number groups correlated equations are obtained by experiment. Mass transfer characteristic is the best when inlet located on the top and outlet on the bottom of the cell respectively. While magnified the volume of the cell to eight times, mass transfer characteristic changes little. Mass transfer characteristic without nets is lower than that of with additional nets in the exit region, but higher than that of with additional nets in the entry region.一种过滤器出版社类型的传质特征上的配置(电极,极间差距,入口和插头的位置,房间的体积和另外的网的结构) 的效果电气化学的房间被学习了。电极上的传质系数被基于限制扩散电流的决心使用著名技术获得。有网孔电极的传质系数比的大,这被发现与极板。传质系数与极间差距被减少。当极间差距完成了某个价值(7 公里) 时,传质系数是稳定的,不再衰退。为入口和插头的不同位置的传质特征是不同的,尺寸更少数字组相关方程被实验获得。当入口分别地在房间的底部上在顶和插头上定位了时,传质特征是最好。当放大时,到八的房间的体积预定,传质特征变化很少。没有网的传质特征比的低与在出口区域的另外的网,但是高比的与在入口区域的另外的网。

关 键 词:mass transfer characteristic mass Iransfer coefficient filter-press type electrochemical cell limiting current . 

分 类 号:O646[理学—物理化学]

 

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