Vapor-liquid equilibrium in the sodium carbonate-sodium bicarbonate-water-CO2-system

被引：35

作者：

Knuutila, Hanna ^{[1
]}

Hessen, Erik T. ^{[1
]}

Kim, Inna ^{[1
]}

Haug-Warberg, Tore ^{[1
]}

Svendsen, Hallvard F. ^{[1
]}

机构：

[1] Norwegian Univ Sci & Technol, Dept Chem Engn, N-7491 Trondheim, Norway

来源：

CHEMICAL ENGINEERING SCIENCE | 2010年 / 65卷 / 06期

关键词：

CO2; absorption; Sodium carbonate solutions; Electrolyte NRTL; Phase equilibria; Separations; AQUEOUS-ELECTROLYTE SYSTEMS; LOCAL COMPOSITION MODEL; EXCESS GIBBS ENERGY; MIXED ELECTROLYTES; DIOXIDE; BICARBONATE; WATER; THERMODYNAMICS; ABSORPTION; PRESSURE;

D O I：

10.1016/j.ces.2009.12.024

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

Vapor-liquid equilibria of the carbon dioxide loaded sodium carbonate-water system were measured in the temperature range 40-80 degrees 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 degrees 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 degrees 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 CO2. For vapor pressure of water the standard deviation is 0.6% up to 100 degrees C and 30 wt% sodium carbonate solutions. (C) 2009 Elsevier Ltd. All rights reserved.

引用

页码：2218 / 2226

页数：9

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