Catalytic Supercritical Water Oxidation of Nitrogen-containing Organic Compounds PDF Download
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Author: Mauricio Julio Angeles Hernández
Publisher:
ISBN:
Category :
Languages : en
Pages : 0
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Author: Mauricio Julio Angeles Hernández
Publisher:
ISBN:
Category :
Languages : en
Pages : 0
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Author: Faihan Saleh Alsoqyani
Publisher:
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Category :
Languages : en
Pages :
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Author: Lisete Dos Santos Pinto
Publisher:
ISBN:
Category :
Languages : en
Pages : 224
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Author: Falah Kareem Hadi Al-Kaabi
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Category :
Languages : en
Pages :
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Author:
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Category :
Languages : en
Pages :
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The results of the catalytic oxidation in supercritical water of two non-biodegradable and highly toxic nitrogen-containing organic compounds (DBU and quinoline) are presented. The reactions were studied in a tubular xed-bed reactor over three catalysts: Pt/Al\(_2\)O\(_3\), CuO/Al \(_2\)O\(_3\) and MnO\(_2\)/CuO. The effect of operating conditions, namely temperature, pressure, oxygen concentration and initial concentration of the organic compounds were studied to evaluate their influence on its removal. Reaction rates were calculated from the experimental data collected. In addition, the selectivities and stabilities of the catalysts were investigated. Before conducting the experimental study the isothermal and isobaric operation of the reactor was veried together with the complete decomposition of hydrogen peroxide to oxygen and water in the preheating section and the reproducibility of experimental data was verified. Absence of external concentration gradients was determined experimentally for each reaction. The results showed that temperature was the main controlling variable of the catalytic oxidation. On the contrary, the effect of pressure depended on the catalyst used. Increasing the concentration of the organic compound did not aect their oxidation. Meanwhile, oxygen concentration above a stoichiometric ratio of two did not considerably improve the reaction. A power-law kinetic model was proposed to quantify the oxidation reaction. Three Langmuir-Hinshelwood-Hougen-Watson reaction rates were also explored to the experimental data. In the absence of a specic reaction mechanism the kinetic data were best represented by the power-law kinetic model. CO2 was the main carbon product of the reaction with small amounts of inorganic carbon species dissolved in the liquid effluent. Meanwhile, NH\(_4\), NO\(_3\) and NO\(_2\) ions were the only nitrogen species detected in the liquid effluent. Pt/Al\(_2\)O\(_3\) proved to be the most effective catalyst because it promo.
Author: Mauricio Julio Angeles Hernández
Publisher:
ISBN:
Category :
Languages : en
Pages : 294
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Author: Graeme Short
Publisher:
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Category : Methanol
Languages : en
Pages : 384
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Author: Shuzhong Wang
Publisher: Springer Nature
ISBN: 9811393265
Category : Technology & Engineering
Languages : en
Pages : 352
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Book Description
This book systematically presents the technical aspects of supercritical water oxidation and supercritical water gasification for energy and environmental applications, which include reactor design, construction materials, corrosion, salt precipitation, etc. The book provides a comprehensive introduction to the properties of supercritical water, and the industrial applications, reaction mechanisms and reaction kinetics of supercritical water oxidation (SCWO) and supercritical water gasification (SCWG). The reactions occurring in supercritical water are complex, and studying their reaction mechanisms is of great importance for the development of supercritical water processing technologies. Accordingly, the book explains the oxidative mechanisms and kinetics of organic matter in supercritical water in detail. However, the harsh reaction conditions in supercritical water can easily create severe reactor corrosion and salt deposition problems. Therefore, the book also comprehensively reports on the mechanism analysis, state of research, and development trends regarding these two problems. Lastly, the book summarizes the development of supercritical water processing technologies, including studies on SCWO and SCWG, as well as near-zero-emission systems of pollutants based on SCWO technology. In short, the book provides a wealth of valuable information for all readers who are interested in using SCWO for organic waste treatment, and in using SCWG for hydrogen production with wet biomass.
![The Treatment of a Toxic Nitrgenous-containing Organic Compound by Supercritical Water Oxidation and Wet Air Oxidation Processess [sic] PDF](https://books.google.com/books/content/images/frontcover/DZQOswEACAAJ?fife=w80-h100)
Author: Nur Hezlin Ashraf-Ball
Publisher:
ISBN:
Category :
Languages : en
Pages : 213
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Author: Stuart J. Moore
Publisher:
ISBN:
Category :
Languages : en
Pages : 68
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Book Description
Supercritical Water Oxidation (SCWO) has been shown to efficiently destroy wet organic wastes. The process, iterations, and lessons learned during the design and fabrication process of a continuous, inverted SCWO reactor are described. Ethanol is oxidized in a continuous inverted supercritical water oxidation reactor at 25 MPa, with oxidant and fuel preheat temperatures of 380 to 450 °C. Optimal conditions for future operation are found by operating at various premixed fuel concentrations of 0-7 mol% ethanol in water, varying the air to fuel equivalence ratio from 1.1 to 1.8, and utilizing air and hydrogen peroxide as the oxidant. Experimental conditions are chosen for analysis of reactor temperatures during complete oxidation of pilot fuel, where ethanol will rapidly oxidize. Higher premixed concentrations of ethanol produce a more localized, higher temperature reaction occurring closer to the nozzle with longer residence times. Preliminary results find the use of air results in lower reaction temperatures than hydrogen peroxide at similar operational conditions due to nitrogen loading; the experiments with air are still on-going. The results are used to determine the capability of the reactor for the destruction of toxic organic compounds.
