Enthalpy changes upon partial evaporation of aqueous solutions containing ammonia and carbon dioxide
- Univ. Kaiserslautern (Germany). Lehrstuhl fuer Technische Thermodynamik
The thermodynamic properties of aqueous solutions containing ammonia and sour gases such as carbon dioxide, sulfur dioxide, or hydrogen sulfide must be known in many applications. A typical example is the cleaning of raw gases in power stations. The enthalpy changes upon partial evaporation of aqueous solutions containing ammonia and of aqueous solutions containing ammonia and carbon dioxide were measured at temperatures from 313 to 393 K with a thin film evaporator flow calorimeter. The molalities of ammonia and carbon dioxide entering the calorimeter ranged up to 12 and 6 mol/kg, respectively. The physicochemical model originally developed by Edwards et al. (1978) and further modified and extended by Kurz et al. (1995) to describe phase equilibria in aqueous systems containing ammonia and carbon dioxide is used to derive a predictive enthalpy model for this complex, chemical reactive system. Comparisons between the new experimental results for the enthalpy change upon partial evaporation and model predictions reveal deviations mostly within the experimental uncertainties.
- OSTI ID:
- 659044
- Journal Information:
- Industrial and Engineering Chemistry Research, Journal Name: Industrial and Engineering Chemistry Research Journal Issue: 8 Vol. 37; ISSN IECRED; ISSN 0888-5885
- Country of Publication:
- United States
- Language:
- English
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