Determination of critical conditions for the esterification of acetic acid with ethanol in the presence of carbon dioxide

G. M. Platt, N. Henderson, J. L. de Medeiros
2006 Brazilian Journal of Chemical Engineering  
In this work, we present the calculation of critical coordinates for the esterification of acetic acid with ethanol in compressed carbon dioxide. Determination of the critical pressure for this system is useful, since the conversion of this reaction increases with pressure in the two-phase region, reaching a maximum at the critical point. We used a calculation framework based on a coordinate transformation for molar fractions, producing a new compositional domain. For a system with five
more » ... ts (acetic acid + ethanol + ethyl acetate + water + carbon dioxide) and one equilibrium reaction, the compositional domain is entirely described by three independent transformed coordinates. The results obtained were compared with experimental observations presented in the literature. The results illustrate the capability of the framework used to determine critical coordinates for reactive systems, and thus its usefulness as a tool for pressure tuning for this esterification reaction in compressed carbon dioxide.
doi:10.1590/s0104-66322006000300009 fatcat:zywey3lbknhexoyhgcpb3wbazy