Solubility and Solid-Phase Composition in Na2CO3-Na2SO4 Solutions at Boiling Temperature: A Modeling Approach
Artikel i vetenskaplig tidskrift, 2008
Scaling caused by Na2CO3-Na2SO4 double salts constitutes a severe problem in black liquor evaporators.
The ability to predict the solubility and solid-phase composition of these species would be conclusive in
minimizing the adverse effects of scaling. Experimental solubility data for (sodium sulfate) dicarbonate, a
carbonate-rich double salt identified in Na2CO3-Na2SO4 precipitates, were generated and used for fitting an
empirical solubility model. A thermodynamically based approach for predicting the solubility and solidphase
composition, previously used for burkeite precipitates, was applied to solid solutions of dicarbonate.
(sodium sulfate) dicarbonate