Global reaction heat of acetic acid oxidation in supercritical water

Cyril Aymonier (1) , Aurélia Gratias (1) , Jacques Mercadier (2) , François Cansell (1)

1 ICMCB - Institut de Chimie de la Matière Condensée de Bordeaux
2 ENSGTI - Ecole Nationale supérieure en génie des Technologie Industrielle

The scaling-up of hydrothermal oxidation process is performed by the use of simulation tools, which require an important experimental support. In this way, we have proposed a new experimental approach to determine the global reaction heats of hydrothermal oxidation reactions. A quasi-adiabatic tubular reactor was developed in order to follow the temperature profiles along the reactor during the oxidation reaction. From the experimental temperature profiles, a model of the reactor thermal behavior was proposed and gives access to the global reaction heats. The experimental setup and model have been validated for acetic acid oxidation in supercritical water with hydrogen peroxide as oxidant. The global reaction heat of acetic acid hydrothermal oxidation (P=25 MPa, 400 5T5570 °C) has been found equal to −925 kJ mol −1 .

Mots clés: Hydrothermal oxidation; Temperature profile; Reactor simulation; Acetic acid; Global reaction heat

Domaines: Matériaux

Cyril Aymonier, Aurélia Gratias, Jacques Mercadier, François Cansell. Global reaction heat of acetic acid oxidation in supercritical water. Journal of Supercritical Fluids, 2001, 21 (3), pp.219-226. ⟨10.1016/S0896-8446(01)00094-8⟩. ⟨hal-03718384⟩