Oxidation kinetics of ammonia and ammonia-methanol mixtures in supercritical water in the temperature range 530-700.degree.C at 246 bar

Webley, Paul A.; Tester, Jefferson W.; Holgate, H. Richard

doi:10.1021/ie00056a010

Cited by 139 publications

(121 citation statements)

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“…The next step for this study of SCWO kinetics of nitrogenous waste will be to accurately measure ammonia oxidation rates in a temperature range of 550 to 650 °C given its refractory behavior (Webley et al, 1991). Figure 5: Urea hydrolysis assumed first order rate constants as a function of temperature.…”

Section: Urea Hydrolysis Studymentioning

confidence: 99%

“…Previous elementary reaction rate models have had limited success in correctly predicting the methane SCWO data (Webley and Tester, 1991, Dagaut et al, 1996, Savage et al, 1998. These efforts were also hindered by the lack of reliable methane data in the literature.…”

Section: Methane Scwo Studymentioning

confidence: 99%

“…Additionally, we have begun to re-examine methane hydrolysis and oxidation kinetics in SCW as first measured in our laboratory in 1989 (Webley and Tester, 1991). As evidenced in the recent MPA investigation, methane is an important intermediate product of the oxidative destruction of many carbon-containing wastes.…”

Section: Introductionmentioning

confidence: 99%

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Kinetics of Chemical Agents Destruction in Supercritical Water

Tester¹,

Sullivan²,

Ploeger³

et al. 2003

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Section: Urea Hydrolysis Studymentioning

confidence: 99%

Section: Methane Scwo Studymentioning

confidence: 99%

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Kinetics of Chemical Agents Destruction in Supercritical Water

Tester¹,

Sullivan²,

Ploeger³

et al. 2003

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“…The rates of key elementary reactions were varied within their uncertainties by the authors to improve agreement with methanol SCWO kinetics experiments performed by . [8] This reaction mechanism was integrated into a constant-temperature, constant-pressure reactor model using Sandia's Chemkin Real Gas package [9]. These constant property assumptions were justified based on the small deviations in temperature and pressure recorded for the abridged data set.…”

Section: Detailed Summary Of Technical Progress This Periodmentioning

confidence: 99%

“…(8) For residence times less than the induction time the normalized concentration is set to unity. The model and experimental results are plotted in Figure 10.…”

Section: Detailed Summary Of Technical Progress This Periodmentioning

confidence: 99%

Kinetics of Supercritical Water Oxidation

Rice¹,

Tester²,

Brezinsky³

1995

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Public reporting burden for this collection of information is estimated to average 1 hour per response, including the time for reviewing instructions, searching existing data sources, gathering and maintaining the data needed, and completing and reviewing this collection of information. Send comments regarding this burden estimate or any other aspect of this collection of information, including suggestions for reducing this burden to Washington Headquarters Services, Directorate for Information Operations and Reports, 1215 Jefferson Davis Highway, Suite 1204, Arlington, VA 22202-4302, and This project consists of experiments and theoretical modeling designed to improve our understanding of the detailed chemical kinetics of supercritical water oxidation (SCWO) processes. The objective of the three year project is to develop working models that accurately predict the oxidation rates and mechanisms for a variety of key organic species over the range of temperatures and pressures important for industrial applications. Our examination of reaction kinetics in supercritical water undertakes in situ measurements of reactants, intermediates, and products using optical spectroscopic techniques, primarily Raman spectroscopy. Our focus is to measure the primary oxidation steps that occur in the oxidation of methanol, phenol, methylene chloride, and some simple organic compounds containing nitro groups with a special emphasis on identifying reaction steps that involve hydroxyl radical and hydrogen peroxide. SUBJECT TERMSsupercritical water oxidation (SCWO), optical spectroscopic techniques, Raman spectroscopy, SERDP Project description: This project consists of experiments and theoretical modeling designed to improv* our understanding of the detailed chemical kinetics of supercritical water oxidation (SCWO) processes. The objective of the three year project is to develop working models that accurately predict the oxidation rates and mechanisms for a variety of key organic species over the range of temperatures and pressures important for industrial applications. Our examination of reaction kinetics in supercritical water undertakes in situ measurements of reactants, intermediates, and products using optical spectroscopic techniques, primarily Raman spectroscopy. Our focus is to measure the primary oxidation steps that occur in the oxidation of methanol, phenol, methylene chloride, and some simple organic compounds containing nitro groups with a special emphasis on identifying reaction steps that involve hydroxyl radical and hydrogen peroxide.The work conducted here continues the experimental approach from our previous SERDP-funded project by extending measurements on key oxidant species and expanding the variety of experimental methods, primarily optical in nature, that can be used to examine reactions at SCWO conditions. Direct support will be sent to the project collaborators at MIT and Princeton who will contribute to the model development for the halogenated systems and phenol. In general, these researchers will exami...

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Stoichiometric Organic Reactions

Ikushima

Arai

1999

Chemical Synthesis Using Supercritical Fluids

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Oxidation kinetics of ammonia and ammonia-methanol mixtures in supercritical water in the temperature range 530-700.degree.C at 246 bar

Cited by 139 publications

References 11 publications

Kinetics of Chemical Agents Destruction in Supercritical Water

Kinetics of Chemical Agents Destruction in Supercritical Water

Kinetics of Supercritical Water Oxidation

Stoichiometric Organic Reactions

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