COMBINED MASS AND ENERGY-BALANCE ANALYSIS OF AN ELECTROCHEMICALLY MODULATED EQUILIBRIUM STAGE PROCESS

被引:7
作者
JEMAA, N
NOBLE, RD
KOVAL, CA
机构
[1] UNIV COLORADO,DEPT CHEM ENGN,BOULDER,CO 80309
[2] UNIV COLORADO,DEPT CHEM & BIOCHEM,BOULDER,CO 80309
基金
美国国家科学基金会;
关键词
D O I
10.1016/0009-2509(92)80292-K
中图分类号
TQ [化学工业];
学科分类号
0817 ;
摘要
A cyclical electrochemical process for the removal of a solute from a feed phase and concentrating it in a receiving phase is studied. The extraction and release of the solute are based on the complexation reactions with the reduced and oxidized forms of the complexing agent in a third contacting phase. The magnitude of the two distribution coefficients play an important role in this equilibrium process. A combination of mass and energy balances are used to determine the amount of solute transferred from a feed phase to a receiving phase using a graphical method. The minimum theoretical voltage required for this process is derived and found to be dependent on the reaction equilibrium constants. The work involved in such a process is also a function of the reaction equilibrium constants, the ratio of carrier to solute concentration, and the number of stages required for a certain separation criteria. The thermodynamic efficiency can be large, compared to some other separation processes, with the appropriate combination of the key parameters.
引用
收藏
页码:1469 / 1479
页数:11
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