Catalytic Wet Air Oxidation of Oxalic Acid using Platinum Catalysts in Bubble Column Reactor: A Review

Abstract

Wastewater treatment and re-use of industrial process water are critical issue for the development of human activities and environment conservation. Catalytic wet air oxidation (CWAO) is an attractive and useful technique for treatment of effluents where the concentrations of organic pollutants are too low, for the incineration and other pollution control techniques to be economically feasible and when biological treatments are ineffective, e.g. in the case of toxic effluents. In CWAO, combustion takes place on a Pt/Al2O3 catalysts usually at temperatures several degrees below those required for thermal incineration. In CWAO process, the organic contaminants dissolved in water are either partially degraded by means of an oxidizing agent into biodegradable intermediates or mineralized into innocuous inorganic compounds such as CO2, H2O and inorganic salts, which remain in the aqueous phase. In contrast to other thermal processes CWAO produces no NOx, SO2, HCl, dioxins, furans, fly ash, etc. This review paper presents the application of platinum catalysts in bubble column reactor for CWAO of oxalic acid.

Wet Oxidation as an Advanced and Sustainable Technology for Sludge Treatment and Management: Results from Research Activities and Industrial-Scale Experiences

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RuCl3 Supported on N‐Doped Graphene as a Reusable Catalyst for the One‐Step Glucose Oxidation to Succinic Acid

“…Under the WO conditions, hydroxy and hydroperoxy radicals are formed be the reduction of oxygen and dissociation and oxidation of water, which also results in the generation of a concentration of hydrogen peroxide . These radicals, together with the free oxygen, can attack at the reducing end group of glucose (i.e., aldehyde group), resulting in the opening of the glycosidic ring and the formation of carboxylic acids.…”

Anaerobic treatability of liquid residue from wet oxidation of sewage sludge

“…A research by Roy et al (2010) recorded the presence of 200 WO full scale plants operating around the world for the treatment of high-strength industrial wastewaters.…”