Calorimetric Studies of Precipitating Solvent System

Abstract

Calorimetric study of a precipitating solvent system of Potassium-Taurate (KTAU) was performed in the CPA202 calorimeter. Two different experiments were conducted, i.e. heat of absorption of CO2 in KTAU solvent at different conditions (concentration = 1.5M and 3.0M), loading up to ∼ 0.8mol CO2/ mol Taurine and temperature = 25°C, 40°C, 80°C). Moreover, dissolution heats of Taurine/solid were also measured. The result agrees well with the reported data. The procedure developed for the heat of dissolution measurements was verified by measuring heat of dissolution of solid Taurine in water and comparing results with data in literature. The solid formation occurs during the absorption of CO2 in 3.0M KTAU at low temperatures (25°C and 40°C) and at loadings (∼ 0.3mol CO2/ mol Taurine). The heat of dissolution of the formed solid in pure water is slightly higher than that of Taurine in pure water but less heat is required to dissolve the same solids in unloaded 3.0M KTAU solution.