Diffusivity and solubility of carbondioxide in diluted polymer solutions

Abstract

Abstract Diffusion coefficients of CO 2 in aqueous Newtonian solutions of polyvinyl alcohol and polyethylene glycol with molecular weights varying from 1500 to 100,000 were obtained from absorption rate measurements in a wetted‐wall column and the CO 2 solubilities determined independently. The exponent A of the diffusivity‐viscosity relation is found to be a strong function of the molecular weight of the applied polymer. The data suggest the following correlation: which indicates that the exponent may vary from 0.04 to 0.4 for the solutions studied.