Trickle-bed CFD studies in the catalytic wet oxidation of phenolic acids

Water pollution abatement by catalytic wet air oxidation in a trickle bed reactor

Catalytic wet air oxidation of an aqueous phenol solution was carried out in a trickle bed reactor at mild conditions of temperature (120–160◦C) and oxygen partial pressure (0.6–1.2 MPa). Tests were performed at space times up to 1 h. A commercially available copper oxide supported over g-alumina was used as catalyst. The results show that the phenol conversion, the chemical oxygen demand (COD)...

CFD Modelling of Trickle-Bed Reactors for Wastewater Treatment

This study aims to incorporate most recent multiphase models in order to investigate the hydrodynamic behaviour of a TBR in terms of pressure drop, liquid holdup and catalyst wetting efficiency. Taking into account transport phenomena such as mass and heat transfer, an Eulerian k-fluid model was developed resulting from the volume averaging of the continuity and momentum equations and solved fo...

Catalytic wet oxidation of lactose

Catalytic Wet Air Oxidation of Aqueous Solutions of Ammonia in a Continuous-flow Trickle-bed Reactor over Metal Supported on Carbon Materials

In this study, aqueous solutions of 600 mg L of ammonia were oxidized in a trickle-bed reactor using Cu-activated carbon fiber (ACF) catalysts, which were prepared by incipient wet impregnation with aqueous solutions of copper nitrate that was deposited on ACF substrates. Experimental results showed that the total conversion efficiency of ammonia was 93% during wet oxidation over the catalyst a...

CFD Simulation of Porosity and Particle Diameter Influence on Wall-to-Bed Heat Transfer in Trickle Bed Reactors

Wall-to-bed (or wall-to-fluid) heat transfer issues in trickle bed reactors (TBR) has an important impact on operation and efficiency in this category of reactors. In this study, the hydrodynamic and thermal behavior of trickle bed reactors was simulated by means of computational fluid dynamics (CFD) technique. The multiphase behavior of trickle bed reactor was studied by the implementation of ...