Fluid Phase Equilibria, Vol.198, No.2, 251-256, 2002
Small-angle X-ray scattering study on correlation length and density fluctuations in a supercritical CO2-water mixture
The microscopic inhomogeneity in a supercritical mixture of (CO2)(1-x)(H2O)(x) (x = 0.003) has been studied by small-angle X-ray scattering (SAXS) at 308.2 K and six different pressures/densities. The results show that the correlation length and density fluctuation is maximized near the critical point where the partial molar volume reaches a minimum.