Experimental and Modeling Studies on the Solubility of Sub- and Supercritical Carbon Dioxide (scCO^sub 2^) in Potato Starch and Derivatives

摘要

The solubility of CO2 in native potato starch (NPS) and potato starch acetate (SA) at two different temperatures (50° C and 120° C) and various pressures (up to 25 MPa) was determined using a magnetic suspension balance. Within the experimental window, a maximum solubility of 31 mg CO2/g^sub sample^ for NPS and 79.4 mg CO2/g^sub sample^ for SA was obtained. The CO2 sorption behavior is highly depending on the temperature and pressure. The solubility data were modeled with the Sanchez Lacombe equation of state (S-L EOS). The swelling (S^sub w^) values, as predicted using the S-L EOS, were relatively small and a maximum value of 6.1% was obtained for SA at 25 MPa and 120° C. [PUBLICATION ABSTRACT]