Gaseous Sulfate Solubility in Glass: Experimental Method

Abstract

Sulfate solubility in glass is a key parameter in many commercial glasses and nuclear waste glasses. This report summarizes key publications specific to sulfate solubility experimental methods and the underlying physical chemistry calculations. The published methods and experimental data are used to verify the calculations in this report and are expanded to a range of current technical interest. The calculations and experimental methods described in this report will guide several experiments on sulfate solubility and saturation for the Hanford Waste Treatment Plant Enhanced Waste Glass Models effort. There are several tables of sulfate gas equilibrium values at high temperature to guide experimental gas mixing and to achieve desired SO 3 levels. This report also describes the necessary equipment and best practices to perform sulfate saturation experiments for molten glasses. Results and findings will be published when experimental work is finished and this report is validated from the data obtained.

A crucible salt saturation method for determining sulfur solubility in glass melt

“…The experimental procedure of the bubbling method has been reported in detail elsewhere . Briefly, 50‐60 g of a slightly modified premelted baseline glass LAWA1610S (LAWA161 with zero sulfur, the target composition was shown in Table ) was placed in a cylindrical platinum crucible (32 mm in diameter and 75 mm tall) and heated to 1150°C.…”