Factors Influencing the Formation of Sodium Hydroxide by an Ion Exchange Membrane Cell

Abstract

The present study aimed to evaluate the factors that influence the formation of sodium hydroxide (NaOH) by means of an electrolytic cell with ion exchange membranes. To achieve this experiment, the NaOH production cell had to be designed and built inexpensively, using graphite electrodes. The operational parameters in our study were: initial NaOH concentration, applied voltage, and temperature. All experiments were carried out using model NaCl solutions with a concentration of 40 g/L for 150 min. The results of the experiment were that the NaOH concentration, conductivity, and pH presented an increasing linear trend with the electrolysis time. Finally, it was possible to obtain the efficiency level of the electric current in our investigation, which was an average of 80.2%, that indicated good performance of the built cell.

A Sustainable Integration Approach of Chlor-Alkali Industries for the Production of PVC and Clean Fuel Hydrogen: Prospects and Bangladesh Perspectives

“…The modern membrane technologies use a cation exchange membrane between halfcells to produce Cl 2 and NaOH from the electrolysis of brine solutions, which enables the safe manufacturing of Cl 2 and NaOH [24]. Due to the rigorous standards for brine purity imposed by membrane cells and during the product's recovery stage, the chloralkali industry presents a potential field of application for other membrane technologies in addition to the ion-exchange membranes [5].…”

“…Precipitation with OH − and CO 3− removes the hardness and heavy metals. Acidification is the last step in the brine preparation process where microfiltration and nanofiltration, two types of membrane technology, are both employed [24]. For microfiltration and nanofiltration polytetrafluoroethylene (PTFE) membranes and polymer nanofiltration membranes are used, respectively [27].…”

Designing a Bipolar Membrane Electrolyzer for NaCl Electrolysis to Produce High-Quality NaClO

“…In order fabricate NaClO, Cl 2 is allowed to react with NaOH in another reactor (2NaOH + Cl 2 NaClO + NaCl + H 2 O). As a result, only half of NaCl can be converted into NaClO, − and the NaCl utilization efficiency is too low.…”