scholarly journals A Study of Diffusion Permissibility of MK-40 Membrane in Thermodynamic Conditions

2020 ◽  
Vol 26 (4) ◽  
pp. 619-628
Author(s):  
N. Ts. Gatapova ◽  
◽  
M. K. Dzhubari ◽  
N. V. Alekseeva ◽  
◽  
...  
Keyword(s):  
Sodium Chloride ◽  
Ion Exchange ◽  
Permeability Coefficient ◽  
Temperature Drop ◽  
Diffusion Permeability ◽  
Modes Of Operation ◽  
Aqueous Sodium ◽  
Sodium Chloride Solutions ◽  
Thermodynamic Conditions ◽  
Exchange Membrane

The temperature modes of operation of ion-exchange membranes in an electrodialysis apparatus are described. The diffusion permeability of the MK-40 ion-exchange membrane has been experimentally investigated under the conditions of a temperature difference across the membrane at various concentrations of an aqueous solution of sodium chloride. The differences in the diffusion permeability of the membrane in thermostatic and thermodynamic modes are shown. The nature of the influence of the temperature drop across the membrane of aqueous sodium chloride solutions on changes in the value of the diffusion permeability coefficient of the MK-40 membrane was determined.

scholarly journals Diffusion and Osmotic Permeability of Ion Exchange Membrane MK-40 Using Sodium Chloride Solution

2021 ◽  
Vol 29 (4) ◽  
Author(s):  
Mohammed Qader Gubari ◽  
Haider Mohammed Zwain ◽  
Nadezda Vyacheslavovna Alekseeva
Keyword(s):  
Sodium Chloride ◽  
Cation Exchange ◽  
Permeability Coefficient ◽  
Elevated Temperatures ◽  
Diffusion Permeability ◽  
Membrane Properties ◽  
Nacl Solution ◽  
Osmotic Permeability ◽  
Exchange Membrane ◽  
Over Time

Cation exchange membrane (MK-40) is a commercial membrane with a fixed group that is an important part of the electrodialysis (ED) process. Sodium chloride (NaCl) diffusion and osmotic permeability for MK-40 was studied. A cell containing two compartments was used to analyse the properties of the MK-40 membrane fixed between them. Furthermore, the influence of temperature, NaCl concentration, and operating time on MK-40 properties was investigated. The results showed that the highest diffusion permeability coefficient of NaCl was 7.37×10-9 (m2/s), and the maximum osmotic permeability coefficient of distilled water was 43.8×10-9 (m2/s) at NaCl solution concentration of 0.1 M and 50oC. Generally, the permeability was constant beyond 60 min of operational time. Additionally, the minimum diffusion permeability coefficients of the MK-40 membrane fell by about 22% over time when the concentration of NaCl solution was 1 M at 25oC. To conclude, membrane properties in the ED process depend on the two electrodes (a cathode and an anode), without the diffusion of salts particles. Meanwhile, the most important properties of cation exchange membranes (CEMs) used in electrodialysis are increased membrane efficiency when water and salts transport decrease through CEMs, which leads to a decrease in energy consumption. Thus, the MK-40 membrane showed a good properties due to its low diffusion permeability for concentrated NaCl solution at elevated temperatures and minimum reduction in diffusion permeability of concentrated NaCl solution over time.

Thermodynamic Difference between Protocatechualdehyde andp-Hydroxybenzaldehyde in Aqueous Sodium Chloride Solutions

2017 ◽  
Vol 62 (3) ◽  
pp. 902-912 ◽  
Author(s):  
Jimin Xie ◽  
Min Liu ◽  
Guiqin Liu ◽  
Lixia Yuan ◽  
Dacheng Li ◽  
...  
Keyword(s):  
Sodium Chloride ◽  
Chloride Solutions ◽  
Aqueous Sodium ◽  
Sodium Chloride Solutions

Solubility of four gas hydrate formers in water and aqueous sodium chloride solutions

Desalination ◽  
1966 ◽  
Vol 1 (4) ◽  
pp. 342-358 ◽  
Author(s):  
Walter W. Carey ◽  
Normantas A. Klausutis ◽  
Allen J. Barduhn
Keyword(s):  
Sodium Chloride ◽  
Gas Hydrate ◽  
Chloride Solutions ◽  
Aqueous Sodium ◽  
Sodium Chloride Solutions
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