A NEW APPARATUS FOR THE DETERMINATION OF P-X-Y DIAGRAMS AND HENRYS CONSTANTS IN HIGH-PRESSURE ALCOHOLS WITH CRITICAL CARBON-DIOXIDE

P-x-y diagrams and Henry's constants for carbon dioxide+methanol, etha nol, acetone, octanol, nonanol and decanol were determined by a novel technique of density measurement at different temperatures and pressur es up to 8 MPa. Solubilities of carbon dioxide in these six binary mix tures were found to increase with applied pressure, but to decrease wi th increasing temperature. Also, Henry's constants for CO2 in these si x systems decreased with ascending pressure but increased with elevate d temperature. The Peng-Robinson equation of state and the Patel-Teja equation of state, with two adjustable parameters, were able to correl ate equilibrium data successfully. (C) 1998 Elsevier Science B.V. All rights reserved.