Development Of a Detection Technique for Titration Using Electrical Resistance Tomography for The Studying of Mixing and Reaction State

Abstract

Electrical resistance tomography (ERT) has been applied in many fields, such as geophysical study, clinical diagnosis, chemical or mineral process measurement, and process optimization. In this research, ERT uses an array of 16 electrodes located equidistant in a layer around the inside of the vessel, creating a 2D plane where conductivity is measured. The information on the state of the reaction and the fluid mixing can be extracted from the ERT measurements. Multiple test cases over a range of vessels, volumes, and chemical concentrations have been done. From 0.05 M to 2 M HCl, H2SO4, and citric acid were titrated with 0.1 M to 4 M NaOH. These reactions have an extensive conductivity range which provides the best case for identifying the reaction’s endpoint and the extent of mixing in the test vessels. Compared to other methods to find the reaction’s endpoint, the data matches up closely.