Engineering of Nanostructured Carbon Catalyst Supports for the Continuous Reduction of Bromate in Drinking Water

Recent works in the development of nanostructured catalysts for bromate reduction drinking water under hydrogen have highlighted importance properties metallic phase support their overall performance. Since most catalyst are carried out powder form, there is an overlooked gap correlation between and performance typical continuous applications such as fixed bed reactors. In this work, it shown that mechanical modification commercially available carbon nanotubes, one promising supports, can significantly enhance activity catalytic system when tested a stirred tank reactor, but upon transition to formation preferential pathways liquid flow high pressure drops were observed. This effect could be minimized by addition inert filler increase porosity; however, improvement compared with as-received material was not retained. The operation then optimized using 1 wt.% Pd supported on nanotubes. Effluent rates well loadings systematically find efficient set parameters system, regarding its performance, capacity treat large effluent flows, minimization requirements. Experiments presence distilled reaction medium demonstrate efficiently removed from phase, whereas real matrix, tendency deactivation over time more apparent throughout 200 passages bed, which mostly attributed competitive adsorption inorganic matter active centers, or mineral deposits blocking access catalyst.