شماره ركورد كنفرانس :
4518
عنوان مقاله :
A Thermodynamic Model for Estimating Acid Gas Solubility in Aqueous Alkanolamines
Author/Authors :
Afshin Heidari Department of Chemical Engineering, Shiraz University of Technology, Shiraz Iran , Fatemeh Sabzi Department of Chemical Engineering, Shiraz University of Technology, Shiraz Iran , Khashayar Nasrifar Department of Chemical Engineering, Shiraz University of Technology, Shiraz Iran
كليدواژه :
Solubility , Acid gas , Alkanolamine , Thermodynamic model , Equilibrium partial pressure
عنوان كنفرانس :
The 7th International Chemical Engineering Congress & Exhibition (IChEC 2011
چكيده لاتين :
Partial pressures of carbon dioxide (CO2) and hydrogen sulfide (H2S) over aqueous solutions of
monoethanolamine (MEA) and diethanolamine (DEA) have been correlated using a simple
approach where only a few chemical equilibrium reaction is taken into account assuming ideal gas
and ideal solution. The approach contains the Henry’s law constant and the chemical reaction
equilibrium constants for the formation of carbamate and amine protonation for CO2-amine system
with 4 adjustable parameters and H2S-amine system with just 2 adjustable parameters, resulting in
an explicit expression for calculating the partial pressure of CO2/H2S over an aqueous
alkanolamine solution. Accurate values for the partial pressure of CO2/H2S are obtained for a wide
range of loading (0-1), temperature, amine concentration and pressure that is useful in modeling,
design and handy calculations. The values derived from the model agree well with experimental
data.
