Decomposition of monochlorobiphenyl isomers in supercritical water in the presence of methanol

Anitescu, G.; Tavlarides, Lawrence L.; Munteanu, V.

doi:10.1002/aic.10154

Cited by 19 publications

(19 citation statements)

References 22 publications

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“…Anitescu et al carried out a comprehensive study on the decomposition of tetrachlorobiphenyl and monochlorobiphenyl in the presence of methanol to understand the reaction kinetics and co-oxidative relationship between the reactive and stable species. , It is suggested that the dichlorination reaction dominated over the SCWO of PCBs, but the oxygen molecule could not directly participate in it. In the presence of methanol, the oxygen molecule reacted with methanol to form free radicals at first, as written in .…”

Section: Supercritical Water Oxidation Processmentioning

confidence: 99%

Effect Mechanism of Auxiliary Fuel in Supercritical Water: A Review

Zhang

Wang

Ren

et al. 2019

Ind. Eng. Chem. Res.

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Supercritical water oxidation is a promising alternative for treatment of wastewater and sludge. The addition of auxiliary fuel can achieve the optimization of the system. Owing to the discrepancy in the fuel parameter and reaction condition, the auxiliary fuel presents two different behavior mechanisms in supercritical water, co-oxidation and hydrothermal combustion. The process mechanism, kinetics analysis, and effect behavior for these two processes were systematically reviewed in this work. The co-oxidation between auxiliary fuel compounds, such as methanol, ethanol, isopropyl alcohol, etc. and ammonia, polychlorinated biphenyls was analyzed, and the mixing kinetics models and mechanism investigation approaches were summerized. Besides, the process analysis, kinetics model, and interaction during the supercritical hydrothermal combustion with higher concentration of auxiliary fuel were discussed. Finally, a supercritical water oxidation system with optimized auxiliary fuel was proposed and evaluated by the mechanism-based kinetics simulation, and further research needs were put forward.

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Section: Supercritical Water Oxidation Processmentioning

confidence: 99%

Effect Mechanism of Auxiliary Fuel in Supercritical Water: A Review

Zhang

Wang

Ren

et al. 2019

Ind. Eng. Chem. Res.

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“…The reaction system with no inter-phase mass-transfer limitations leads to a fast reaction rate and high oxidation efficiency. Previous studies have achieved the degradation of chlorinated hydrocarbons including PCBs by the O 2 -SCWO processes (with or without cosolvent) in the temperature range of 420-500 • C [3][4][5]. Another study has carried out the SCWO of PCBs using hydrogen peroxide (H 2 O 2 ) as an oxidant at 400 • C [6,7].…”

Section: Introductionmentioning

confidence: 98%

Supercritical water oxidation of polychlorinated biphenyls based on the redox reactions promoted by nitrate and nitrite salts

Lee

Park

Mahiko

et al. 2006

The Journal of Supercritical Fluids

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“…Kinetic studies of organic mixtures have attracted attention for treating practical wastes usually containing complex chemical mixtures, as well as studies on the co-oxidation of simple mixtures in supercritical water (see Table S1 − in the Supporting Information). Most reports, including one recently from our group on the co-oxidation of alcohol with a compound, have shown that alcohol enhances conversion of the coexisting recalcitrant compound at 530 °C.…”

Section: Introductionmentioning

confidence: 99%

Kinetic Study on Ammonia Oxidation Acceleration by Multi-Injection of Methanol in Supercritical Water

Shimoda

Oshima

2017

Ind. Eng. Chem. Res.

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The effectiveness of multistage methanol injection in supercritical water oxidation (SCWO) of an ammonia/methanol mixture as a method for utilizing the alcohol co-oxidation effect was studied at 530 °C and 25 MPa. A simple global reaction rate model was developed based on the results of kinetic experiments performed at various ammonia, methanol, and oxygen concentrations, yielding excellent agreement with experimental values. Ammonia conversion was predicted when the same molar flow rate of methanol was split between two points: a first injection at the entrance of a reactor and a second injection midway in the reaction stream. Two-stage methanol injection resulted in higher ammonia conversion than in the model calculation when methanol was injected once at the reactor entrance. Model calculations under the same experimental conditions showed that two-stage injection improves ammonia conversion, which aligns closely with predicted values. Moreover, our calculations suggest that ammonia conversion depends on injection timing and on methanol concentration of the flow after injection as well.

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Decomposition of monochlorobiphenyl isomers in supercritical water in the presence of methanol

Abstract: Comprehensive studies of monochlorobiphenyl (MCB)

Cited by 19 publications

References 22 publications

Effect Mechanism of Auxiliary Fuel in Supercritical Water: A Review

Effect Mechanism of Auxiliary Fuel in Supercritical Water: A Review

Supercritical water oxidation of polychlorinated biphenyls based on the redox reactions promoted by nitrate and nitrite salts

Kinetic Study on Ammonia Oxidation Acceleration by Multi-Injection of Methanol in Supercritical Water

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