Topic
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 paper, a free radical-based kinetic model of the phenol disappearance rate was proposed to predict the mineralization of phenolic wastewater, which can be used to predict a linear relationship between phenol and TOC.
28 citations
TL;DR: In this article, partial wet air oxidation of aqueous solutions of polyethylene glycol, a model organic pollutant typically found in wastewaters of polymer-manufacturing, has been investigated at temperatures from 383 K to 513 K and oxygen partial pressures from 2 MPa to 3 MPa.
28 citations
TL;DR: In this article, a facile method for synthesizing Al/Fe pillared clays from natural bentonite clay, by using ultrasonic treatment during the aging and intercalation steps, has been established.
Abstract: A facile method for synthesizing Al/Fe pillared clays (PILCs) from natural bentonite clay, by using ultrasonic treatment during the aging and intercalation steps, has been established. Single metal (Fe-PILCs and Al-PILCs) and mixed metal (Al/Fe-PILCs, with varying compositions of the pillaring precursors) pillared clays were prepared and characterized with a combination of chemical and instrumental methods. The pillared clays were evaluated as catalysts in the catalytic wet air oxidation (CWAO) of phenol and the mixed metal pillared clay catalysts, especially with an Al/Fe ratio of 3 : 1, were found to be highly active and stable, with superior properties such as surface areas, basal spacing, high porosity and thermal stability. The catalysts could also be reused several times without significant loss of activity. The results of the study show that Al/Fe-pillared clay catalysts are effective catalysts for the oxidation of phenol and removal of TOC in aqueous solutions. The main intermediate products in the CWAO of phenol were hydroquinone, pyrocatechol, and benzoquinone and oxalic, formic, malonic, oxalic, malonic and maleic acids.
28 citations
TL;DR: In this paper, a series of small-scale semi-continuous extractions were performed on soils polluted with polycyclic aromatic hydrocarbons, using subcritical water (i.e. liquid water at high temperatures and pressures, but below the critical point) as the removal agent.
28 citations
Patent•
31 Jul 1991
TL;DR: In this article, a heat exchanger employing superheated steam is used to initially heat a waste stream introduced into a wet oxidation reaction vessel for start up and then to subsequently adjust the temperature of the waste stream, after it is preheated by the effluent from the reaction vessel, to a level suitable to maintain steady state operation of a reaction vessel.
Abstract: A method for starting up and controlling the temperature of a wet oxidation process in which a heat exchanger (30) employing superheated steam is used to initially heat a waste stream introduced into a wet oxidation reaction vessel (38) for start up and then to subsequently adjust the temperature of the waste stream, after it is preheated by the effluent from the reaction vessel, to a level suitable to maintain steady state operation of the reaction vessel.
28 citations