Abstract
This study reports on the pathways and kinetics of individual gaseous species involved in the partial oxidation of phenol in supercritical water. The pathway is a combination of supercritical water oxidation (SCWO) and supercritical water gasification (SCWG) processes. A kinetic model that involves oxygen is proposed that fits the experimental data and accurately predicts the effects of the O/phenol ratio on the decomposition of phenol. Specifically, at lower O/Phenol ratios, the gasification of acids and the water gas shift reaction predominated, increasing the amount of H 2 in the gaseous products. At higher O/Phenol ratios, on the other hand, the oxidation of acid intermediates and CO oxidation predominated, thereby increasing the amount of CO 2, while H 2 decreased.
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