Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
150973 | Chemical Engineering Journal | 2011 | 6 Pages |
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 H2 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 CO2, while H2 decreased.
► The pathways of partial oxidation of phenol for hydrogen were found. ► We model kinetics for these reactions. ► The kinetic model can well predict the yields of H2 CO and CO2. ► Instead of converting waste just into CO2 and H2O, partial oxidation for waste-to-energy applications is possible in mechanisms.