The densities and viscosities of partially carbonated monoethanolamine
(MEA), diethanolamine (DEA),
and N-methyldiethanolamine (MDEA) solutions were measured at
298 K. With increasing carbon dioxide
loadings, significant increases in both density and viscosity were
observed. These results were combined
with literature data to produce correlations for alkanolamine solution
density and viscosity as a function
of amine concentration, carbon dioxide loading, and temperature.
The resulting single-amine correlations
were used to predict the densities and viscosities of DEA + MDEA and
MEA + MDEA blends. Predictions
are compared with data measured for these blends.
A new method for the prediction of the viscosity of coal ash slags, in the Newtonian region, is
presented. The technique is modeled on experimental viscosity data less than 1000 Pa s and
hence is most reliable in that region. The capability of the model in predicting the viscosity of
slags from coal ash was found to be superior to a number of the most commonly used empirical
models found in the literature, which are based on simplified oxide melts or British coal ash
slags. The method also provides an indication of the relative fluxing strength of the basic oxides
usually found in coal ash slags. It was found that the fluxing strength is related to the inverse
of the cation radius.
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