Solubility of sulfur dioxide at low partial pressures in dilute sulfuric acid solutions

Govindarao, VMH and Gopalakrishna, KV (1993) Solubility of sulfur dioxide at low partial pressures in dilute sulfuric acid solutions. In: Industrial & Engineering Chemistry Research, 32 (9). pp. 2111-2117.

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Abstract

Equilibrium of dissolution of sulfur dioxide at ppm levels in aqueous solutions of dilute sulfuric acid is analyzed, and a general expression is derived relating the total concentration of sulfur dioxide in the liquid phase to the partial pressure of SO2 in the gas and to the concentration of sulfuric acid in the solution. The equation is simplified for zero and high concentrations of the acid. Experiments at high concentrations of sulfuric acid have enabled the direct determination of Henry’s constant and its dependency on temperature. Heat of dissolution is -31.47 kJ/mol. Experiments in the absence of sulfuric acid and the related simplified expression have led to the determination of the equilibrium constant of the hydrolysis of aqueous sulfur dioxide and its temperature dependency.The heat of hydrolysis is 15.69 kJ/mol. The model equation with these parameters predicts the experimental data of the present work as well as the reported data very well.

Item Type:	Journal Article
Publication:	Industrial & Engineering Chemistry Research
Publisher:	American Chemical Society
Additional Information:	Copyright of this article belongs to American Chemical Society.
Department/Centre:	Division of Mechanical Sciences > Chemical Engineering
Date Deposited:	02 Mar 2011 06:28
Last Modified:	02 Mar 2011 06:28
URI:	http://eprints.iisc.ac.in/id/eprint/35742

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