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Wet oxidation
About: Wet oxidation is a research topic. Over the lifetime, 3094 publications have been published within this topic receiving 61536 citations.
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TL;DR: In this article, a very high amount of Mn4+ was used for the wet air oxidation (CWAO) of phenol at a very low temperature of 70 °C.
29 citations
Patent•
29 Mar 1973
TL;DR: In this paper, a horizontally-elongated reactor vessel divided into generally cylindrical, interconnecting, compartments is used for wet oxidation of waste materials with an oxidizing gas.
Abstract: In the wet oxidation of waste materials with an oxidizing gas, the process is carried out in a horizontally-elongated reactor vessel divided into generally cylindrical, interconnecting, compartments. An aqueous dispersion of the wastes is continuously introduced into a compartment at one end of the reactor vessel, and flows from compartment to compartment while an oxidizing gas is continuously introduced into each compartment. The dispersion is vigorously agitated to disperse the oxidizing gas, and thereby effect oxidation of the waste materials to produce an ecologically acceptable effluent. The average temperature of the dispersion is maintained at a low level, and the pH is held in the acid range.
29 citations
TL;DR: In this article, wet air oxidation (WAO) was investigated for the decomposition of bisphenol A (BPA) in high saline polycarbonate plant wastewater (PCW), and the main operating conditions of the WAO process that affects the degradation efficiency, including temperature, total air pressure and reaction time were studied.
29 citations
TL;DR: In this article, the removal of phenol from water, used as a model organic contaminant, by CWAO with iron (Fe) metal nanoparticles (NPs)-doped carbon microbeads (∼0.6mm) as the catalyst.
Abstract: Catalytic wet air oxidation (CWAO) is extensively used for the destruction of organic contaminants in wastewater. The present study describes the removal of phenol from water, used as a model organic contaminant, by CWAO with iron (Fe) metal nanoparticles (NPs)-doped carbon microbeads (∼0.6 mm) as the catalyst. The Fe-carbon composite was prepared by the carbonization and activation of the phenolic precursor-based polymeric beads in which the Fe NPs were in-situ added during the polymerization stage. Carbon nanofibers (CNFs) were grown on the carbon microbead substrate by catalytic chemical vapor deposition with acetylene as the carbon source. Oxidation reactions were carried out under different operating conditions in a high pressure-stirred reactor, viz., temperature, catalyst loading, and speed of the stirrer. The reactor was fitted with an especially configured impeller cum catalyst basket which held the prepared CNF-decorated Fe-doped carbon beads. The data showed an efficient remediation of the phenol-laden water, indicating the potential scale-up of the proposed CWAO catalyst and impellor cum catalyst holder-assembly in this study.
28 citations
TL;DR: In this paper, the authors showed that the presence of a solid catalyst yields much smaller amounts of intermediates and that the maximum of their occurrence is shifted towards shorter residence times, and that lower amounts are the most responsible for the higher biodegradability found with effluents treated catalytically.
Abstract: Wet oxidation (WO) of diluted aqueous azo dye solutions was carried out with and without a catalyst. The results showed that the presence of a solid catalyst yields much smaller amounts of intermediates and that the maximum of their occurrence is shifted towards shorter residence times. Although the intermediates formed during oxidations are identical, in addition to the different intermediate product distribution their lower amounts are the most responsible for the higher biodegradability found with effluents treated catalytically.
28 citations