Oxidation Kinetics of Methylphosphonic Acid in Supercritical Water PDF Download
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Author: Patricia Ann Sullivan Publisher: ISBN: Category : Languages : en Pages : 438
Book Description
(Cont.) at well-defined operating conditions and to develop. both microscopic and macroscopic models, ranging from regressed global models to an elementary reaction mechanism, to quantify MPA oxidation kinetics in supercritical water. MPA hydrolysis and oxidation rates were experimentally measured in a laboratory-scale plug flow reactor. The effects of MPA concentration (0.5 to 1.0 mM), oxygen concentration (1.0 to 3.8 mM), temperature (478 to 572°C) and pressure (138 to 277 bar) on oxidation rates were determined for residence times ranging from 3.0 to 9.5 s. Conversion due to hydrolysis was less than 6% after [tau]=7 s at all temperatures studied. For [tau]=7 s at stoichiometric conditions and P=246 bar, low conversion (X
Author: Patricia Ann Sullivan Publisher: ISBN: Category : Languages : en Pages : 438
Book Description
(Cont.) at well-defined operating conditions and to develop. both microscopic and macroscopic models, ranging from regressed global models to an elementary reaction mechanism, to quantify MPA oxidation kinetics in supercritical water. MPA hydrolysis and oxidation rates were experimentally measured in a laboratory-scale plug flow reactor. The effects of MPA concentration (0.5 to 1.0 mM), oxygen concentration (1.0 to 3.8 mM), temperature (478 to 572°C) and pressure (138 to 277 bar) on oxidation rates were determined for residence times ranging from 3.0 to 9.5 s. Conversion due to hydrolysis was less than 6% after [tau]=7 s at all temperatures studied. For [tau]=7 s at stoichiometric conditions and P=246 bar, low conversion (X
Author: Publisher: ISBN: Category : Languages : en Pages : 0
Book Description
The work accomplishments during this project consist of five different studies conducted by three current PhD students in the laboratory. An experimental study of methylphosphonic acid (MPA) oxidation has been completed that includes macroscopic modeling of the overall global rate law for MPA oxidation in supercritical water (SCW) and for the major pathways in MPA oxidation. Additionally, an elementary reaction rate model for supercritical water oxidation (SCWO) of MPA has been developed consisting of rate parameters from the available literature and ab initio calculations. Urea hydrolysis kinetics have been experimentally measured at sub and supercritical water conditions. Additionally, recent studies in the laboratory include a co-oxidation stud of MPA and ethanol kinetics in SCW and a methane SCWO experimental study.
Author: Jason M. Ploeger Publisher: ISBN: Category : Languages : en Pages : 168
Book Description
(Cont.) A supercritical water co-oxidation elementary reaction rate mechanism was constructed from submechanisms for MPA and ethanol with updated kinetic rate parameters for H202 and HOCO' chemistry. The co-oxidation mechanism accurately reproduces the experimentally observed conversion trend of the refractory MPA component as a function of initial concentration of the labile ethanol component. The increase in MPA conversion with increasing ethanol concentration is predicted to be caused by the increased concentration of hydroperoxy radicals (HO2') produced by ethanol oxidation. An analysis of the major organophosphorus reaction fluxes indicated that the co-oxidative effect would increase the conversion of MPA but not change the rate of formation of methane. An experiment using a model formaldehyde/methanol mixture as a co-oxidant was conducted to confirm this prediction.
Author: National Research Council Publisher: National Academies Press ISBN: 030917399X Category : Science Languages : en Pages : 82
Book Description
The U.S. Army has asked the National Research Council (NRC) to evaluate whether supercritical water oxidation (SCWO) is an effective and appropriate means of eliminating hazardous or toxic organic constituents in VX hydrolysate for ultimate disposition. The NRC was not asked to conduct an in-depth analysis of the entire integrated VX bulk agent destruction and disposal process for the Newport Chemical Agent Disposal Facility. As the facility design is being finalized (March 1999-April 2000), the NRC will probably be asked to assess all aspects of the facility design, including monitoring, containment, process control, and redundancy, as well as the quantitative risk assessment (QRA). This report outlines the elements of the proposed neutralization/SCWO technology, evaluates the results of ongoing SCWO tests, and makes recommendations concerning aspects of the technology that require further development. The scope of this evaluation did not include evaluations of other potential technologies or management options for the treatment of VX hydrolysate.
Author: Suresh C. Ameta Publisher: Academic Press ISBN: 0128105259 Category : Science Languages : en Pages : 430
Book Description
Advanced Oxidation Processes for Waste Water Treatment: Emerging Green Chemical Technology is a complete resource covering the fundamentals and applications of all Advanced Oxidation Processes (AOPs). This book presents the most up-to-date research on AOPs and makes the argument that AOPs offer an eco-friendly method of wastewater treatment. In addition to an overview of the fundamentals and applications, it details the reactive species involved, along with sections on reactor designs, thus helping readers understand and implement these methods. - Presents in-depth coverage of all types of Advanced Oxidation Processes, including Super Critical Water Oxidation, Photo-Fenton and Like Processes - Includes a fundamental review, applications, reactive species and reactor designs - Reviews applications across waste types, including industrial waste, domestic and municipal sewage, and hospital wastes
Author: Patricia Ann Sullivan
Author: Patricia Ann Sullivan
Author: 
Author: Randy Eugene Powell
Author: Jason M. Ploeger
Author: National Research Council
Author: Paul Anthony Webley
Author: Suresh C. Ameta
Author: Jerry Christopher Meyer
Author: Neil Eugene Crain
Author: Anusuya Kanthasamy