Sharp decline in counter-ion transport number of electrodialysis ion exchange membrane on moderate increase in temperature
By Fasil Qayoom Mir and Anupam Shukla
Published in Desalination
NULL
2015
Abstract
The counter-ion transport-number of membrane affects columbic efficiency of electrochemical cells, many of which encounter varying salt concentration or temperature at different times of operation. Effect of NaCl concentration and temperature on the counter-ion transport number of commercial cation (Selemion \CMV\ and Neosepta CMX) and anion (Selemion \AMV\ and Neosepta AMX) exchange membranes was determined using chronopotentiometry. The transport number of the membranes didn't change with increasing NaCl concentration from 0.017 M to 0.1 M. Variation of transport number with temperature was determined from chronopotentiometric data using the Sand equation as well as a novel procedure. Values obtained from the Sand equation showed an anomalous trend, but the values obtained from the second procedure followed a consistent trend. The counter-ion transport number decreased significantly on increasing temperature by 20
Microsoft is Ending Support for Windows 7
Microsoft will discontinue support for Windows 7 on January 14, 2020 which means Gamry will also be discontinuing support for Windows 7. If you are upgrading to Windows 10, like many companies and institutions, you need to be running Version 7 of our s oftware . Please note that only USB and Ethernet-based instruments can run in Version 7. Eligible users can download the latest version of our software through our online Client Portal .
If you haven't already registered your instrument, you can do so through the Client Portal .
Please email Technical Support if you have any questions regarding this transition. Please be sure to include your instrument model and serial number when contacting us.