The thermal oxidation of organic waste in supercritical water is now a well-known process in several laboratories. The purpose of this work is to model a tubular reactor for supercritical water oxidation (S.C.W.O.). This program makes an assumption of one-dimensional flow. HOwever, several thermal boundary conditions were used (adiabatic reactor, constant heat coefficient, constant heat flux). Different products for which reaction kinetics are known from the literature (acetic acid, methane, methanol, ammoniac, pyridine, hydrogen...) were tested. For each substance, the concentration and temperatures profiles along the reactor axis were determined. Hence, the ignition temperature of the reaction can be calculated and are able to determine the final temperature and conversion.
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