Studies on the Behavior of CO₂ Dissolved in Water by Differential Thermal Analysis

Abstract

The decarboxylation temperature of CO₂ dissolved in pure water and artificial sea-water was investigated to clarify the formation mechanism of scale which is educed as CaCO₃ and Mg (OH) ₂in the process of desalination dy multistage flash evaporation method.
In this study, the decarboxylation temperature was determined by the differential thermal analysis (D. T. A.) instrument with a glass thermistor, which was superior in detecting the thermal reactionin the solution around the room temperature.
The decarboxylation of CO₂ occurres at 18.0°C in the artificial sea-water and at 31.5°C in the pure water.