Vapor-liquid equilibrium in the sodium carbonate-sodium bicarbonate-water-CO sub(2)-system

Vapor-liquid equilibria of the carbon dioxide loaded sodium carbonate-water system were measured in the temperature range 40-80 degree C and for sodium carbonate concentrations 8-12 wt%. In addition the vapor pressure of water over 10-30 wt% sodium carbonate solutions for the temperature range 27-10...

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Bibliographic Details
Published in:Chemical engineering science 2010-03, Vol.65 (6), p.2218-2226
Main Authors: Knuutila, Hanna, Hessen, Erik T, Kim, Inna, Haug-Warberg, Tore, Svendsen, Hallvard F
Format: Article
Language:English
Subjects:
Carbon dioxide
Carbonates
Chemical engineering
Deviation
Mathematical models
Sodium
Sodium carbonate
Vapor pressure
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Summary:Vapor-liquid equilibria of the carbon dioxide loaded sodium carbonate-water system were measured in the temperature range 40-80 degree C and for sodium carbonate concentrations 8-12 wt%. In addition the vapor pressure of water over 10-30 wt% sodium carbonate solutions for the temperature range 27-100 degree C was measured in an ebulliometer. The system was modeled using the electrolyte-NRTL model. Experimental vapor-liquid data from this study as well as data available in the literature from 25 to 195 degree C and for sodium carbonate concentrations from 0.5 to 12 wt% were used for parameter fitting. The average deviation of the model predictions compared to all experimental data found is 9.8% for the partial pressure of CO sub(2). For vapor pressure of water the standard deviation is 0.6% up to 100 degree C and 30 wt% sodium carbonate solutions.
ISSN:0009-2509
DOI:10.1016/j.ces.2009.12.024