A non-traditional energy transfer process in CWPO heterogeneous reaction for wastewater treatment

Abstract

A novel heat transfer pathway in the solid–liquid heterogeneous reaction was realized by a reactor integrated with a high frequency alternating magnetic field (inducting heating reactor, abbr. iHR). In this way, electrical energy converted into heat on the surface of catalyst particles and then heat was transferred from catalysts to liquid phase. That was opposite to traditional heat transfer process. For the novel thermal transfer pathway, temperature on the surface of catalysts was much higher than that of liquid phase. Based on the novel energy transmission style, the new way of energy transfer was used to improve efficiency of some energy-intensive heterogeneous reactions, e.g., catalytic degradation, catalysts regeneration and Fischer–Tropsch synthesis. As an experimental sample, we applied the technology to a typical wastewater treatment process, catalytic wet peroxide oxidation (CWPO). Further, we investigated the relationship between temperature and energy transfer process, the advantage of the reaction and the characteristics of the catalysts. The successful operation increased degradation efficiency of organic pollutant in aqueous solution and proved that the process was energy-saving.