RESUMO
This work investigates H2 production through aqueous phase reforming (APR) of synthetic brewery wastewater in a continuous fixed bed reactor with Pt and PtRe (3 wt %) catalysts supported on activated carbon. The influence of weight hourly space velocity (WHSV) and superficial Ar gas flow velocity (VAr) was assessed for the sake of optimisation, while reaction temperature and pressure were maintained at 225 °C and 28 bar, respectively. H2 production was found to be higher using the PtRe catalyst at the lowest WHSV (0.03 h-1) and highest VAr (0.8 cm s-1). The comparison of the maximum H2 production obtained in this work (27.9 µmol min-1) with other treatment processes shows the potential of the application of APR process for H2 production from brewery wastewater. Despite the different reaction conditions tested, the catalysts showed deactivation with time on stream, which was related to the formation of solid deposits on the surface of the catalysts. Therefore, future research should be related to the development of more stable catalysts, strategies that avoid deactivation by coking and regeneration processes.