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 article, the disappearance rate of acrylic and fumaric acids is proportional to a square root of the oxygen partial pressure; for maleic acid the order takes a very low value (0.12).
Abstract: Unsaturated carboxylic acids such as acrylic, maleic, fumaric, and muconic acids have been observed as intermediate products in wet oxidation reactions of phenols. Oxidation kinetics of these compounds dissolved in water were studied in a titanium autoclave at a temperature range of 180 and 280 °C and oxygen partial pressures between 10 and 55 bar. The acid-decay data are well-represented by a three-half power-law kinetics for all acids. The disappearance rate of acrylic and fumaric acids is proportional to a square root of the oxygen partial pressure; for maleic acid the order takes a very low value (0.12). Thermal decomposition of acrylic acid can be neglected at temperatures employed, but it was found highly significant for maleic, fumaric, and muconic acids. These three acids completely decomposed at 280 °C with formic acid as a major intermediate product, whereas acetic acid was formed only in the presence of oxygen. The conversion of acrylic acid into CO2 and other acid intermediates at 290 °C was f...
50 citations
TL;DR: In this article, wet air oxidation (WAO) is applied to process liquid produced from hydrothermal carbonization (HTC) of dairy manure and wastewater biosolids Different oxygen loadings (25 and 50 atm partial pressure) were charged for WAO at 260 °C for 30 min.
Abstract: Hydrothermal carbonization (HTC) is a promising thermochemical treatment of wet biomass The byproduct HTC process liquid often contains a very high total organic carbon (TOC) Various toxic organic compounds (eg, phenol, furfural, 5-HMF, etc) can be found in HTC process liquid As a result, the HTC process liquid often requires further treatment prior to discharge into the environment In this study, wet air oxidation (WAO) is applied to process liquid produced from HTC of dairy manure and wastewater biosolids Different oxygen loadings (25 and 50 atm partial pressure) were charged for WAO at 260 °C for 30 min Furthermore, the oxidation capability of copper oxide (CuO) was evaluated at the same temperature and time In all cases, the resulting liquid product was clear and has reduced TOC With an increase in oxygen partial pressure, TOC is reduced up to 60% compared to the control run and 74% compared to the original HTC process liquid The primary products in the WAO liquid product are short chain o
50 citations
TL;DR: In this article, a nanocasted Mn-Ce-oxide (CeO2) catalyst was used for complete mineralization of 2,4,6-trichlorophenol.
50 citations
TL;DR: In this article, the catalytic wet air oxidation (CWAO) of aqueous solution of acetic acid (78mmol L−1) was carried out with pure oxygen (2MPa) at 200°C in a stirred batch reactor on platinum supported oxide catalysts (Pt/oxide, oxide=CeO2, Zr0.1Ce0.75Pr0.25)0.
50 citations