Ed. Snijder et al., DIFFUSION-COEFFICIENTS OF SEVERAL AQUEOUS ALKANOLAMINE SOLUTIONS, Journal of chemical and engineering data, 38(3), 1993, pp. 475-480
The Taylor dispersion technique was applied for the determination of d
iffusion coefficients of various systems. Experiments with the system
KCl in water showed that the experimental setup provides accurate data
. For the alkanolamines monoethanolamine (MEA), diethanolamine (DEA),
methyldiethanolamine (MDEA), and di-2-propanolamine (DIPA), correlatio
ns for the diffusion coefficient as a function of temperature at diffe
rent concentrations are given. A single relation for every amine has b
een derived which correlates the diffusion coefficients as a function
of temperature and concentration. The temperature was varied between 2
98 and 348 K, and the concentration between 0 and 4000-5000 mol/m3. Fu
rthermore, a modified Stokes-Einstein relation is presented for the pr
ediction of the diffusion coefficients in the alkanolamines in relatio
n to the viscosity of the solvent and the diffusion coefficient at inf
inite dilution. The diffusion coefficients at low concentrations are c
ompared with some available relations for the estimation of diffusion
coefficients at infinite dilution, and it appears that the agreement i
s fairly good.