2 edition of Chemical and physical aspects of soot/nano-particle formation in combustion. found in the catalog.
Chemical and physical aspects of soot/nano-particle formation in combustion.
John Zhenyu Wen
Written in English
The chemical and physical processes underlying the formation of soot during combustion have been numerically studied using fundamental combustion chemistry and aerosol dynamics theory. A detailed gaseous phase reaction mechanism, which describes the formation and growth of soot precursors including PAH and polyynes, and soot chemistry, which includes the particle nucleation, heterogeneous surface growth, and PAH surface condensation, were coupled to an advanced sectional aerosol dynamics model which is able to calculate the coagulation process of soot agglomerates with fractal structures in three Knudson number regimes. Three studies have been carried out to predict major soot forming characteristics such as particle yield, total number density, averaged particle diameter, and particle size distribution. The first study focused on the investigation of surface growth and condensation processes related to the formation of soot in a Jet Stirred Reactor and Plug Flow Reactor system. The second study looked at the nucleation and surface growth processes during the early stages of soot formation. The third and final study involved modeling the formation of carbonaceous nano-particles during the thermal decomposition of hydrogen free carbon bearing molecules, such as C3O2 and CCl4, behind shock waves. The chemical kinetics concerning pure carbon clusters and particulate coagulation were studied for soot particle formation in the absence of the HACA surface growth mechanism. The numerical simulations showed that the sectional aerosol dynamics models developed in this study were able to be coupled with complex physical processes, such as thermal re-structuring, carbonization, and agglomerate coagulation. Studying the soot formation in a JSR/PFR system revealed that both the HACA surface growth mechanism and the PAH condensation process play significant roles in the growth of soot mass at larger residence times. The investigation of soot formation during the pyrolysis of C6H6 behind a shock wave demonstrated that both the PAH growth pathway and the fast polyyne polymerization process contribute to the early formation of soot particles. Finally, the simulation results of the pyrolysis of C3O2 behind a shock wave were in good agreement with measured characteristics of nano-particle yield.
|The Physical Object|
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Thoroughly rewritten and updated to reflect the latest advances in technology and highlighting the environmental aspects now being emphasized within the coal industry, this Second Edition of a highly acclaimed reference/text provides a comprehensive overview of coal science—covering topics ranging from the origins of coal to mining and contemporary uses/5(3). Get this from a library! Soot Formation in Combustion: Mechanisms and Models. [Henning Bockhorn] -- Soot Formation in Combustion represents an up-to-date overview. The contributions trace back to the Heidelberg symposium entitled "Mechanism and Models of Soot Formation" and have all been.
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This book contains a collection of papers prepared by leading experts on selected areas of particular importance to researchers in combustion science.
The editors have gathered writings on fundamental physical and chemical aspects of combustion, including combustion chemistry, soot formation, and condensed phase and turbulent combustion.
Chemical reactions and physical processes responsible for the formation of polycyclic aromatic hydrocarbons and soot in hydrocarbon flames are reviewed.
The discussion is focused on major elements in the present understanding of the phenomena, clarification of concepts central to the present state of the art, and a summary of new by: Emission of nanoparticles in the atmosphere is of central interest in the field of atmospheric chemistry provoking debate on the relative role of primary particles, directly emitted from combustion systems in the form of volatile organic carbon and nanoparticles, and secondary particles formed from combustion products through atmospheric reactions.
The mechanisms of formation and the physical and chemical characteristics of primary particles Cited by: Soot Formation in Combustion represents an up-to-date overview. The contributions trace back to the Heidelberg symposium entitled "Mechanism and Models of Soot Formation" and have all been reedited by Prof.
Bockhorn in close contact with the original authors. The book gives an easyBrand: Springer-Verlag Berlin Heidelberg. Soot Formation in Combustion: Mechanisms and Models (Springer Series in Chemical Physics) Softcover reprint of the original 1st ed.
Edition (See Top in Books) # in Physical Chemistry # in Chemistry (Books) # in Physics (Books) Would you like to Format: Paperback.
However, most of these models are applied to soot formation during the combustion of a single pulverized coal, and there are only a few studies in which above physical models are applied to pulverized coal combustion field such as a coal jet flame to discuss the soot formation by: 7.
Soot Formation in Combustion represents an up-to-date overview. The contributions trace back to the Heidelberg symposium entitled "Mechanism and Models of Soot Formation" and have all been reedited by Prof.
Bockhorn in close contact with the original authors. A new chapter discusses the impact of combustion processes on the atmosphere, the chapter on auto-ignition is extended to combustion in Otto- and Diesel-engines, and the chapters on heterogeneous combustion and on soot formation are heavily revised.
Soot Formation in Combustion represents an up-to-date overview. formalism of the undergoing chemical and physical processes. expert knowledge in chemical engineering, the book contains Author: Henning Bockhorn.
Carbonaceous soot has been generated from pine in a range of appliances to simulate different combustion conditions. The fuel as well as biomass cell wall components have been studied by pyrolysis-GC−MS and pyrolysis-GC−TCD. In addition, the soots have been probed using both pyrolysis-GC−MS and direct inlet mass spectrometry (DI−MS).
The material collected from the pine combustion Cited by: The surface processes are described in terms of elementary chemical reactions of surface active sites. The method of moments is used to express the mathematical formalism of the undergoing chemical and physical processes.
A new submodel is presented which is capable of calculating the optical properties of an arbitrary ensemble of soot by: All chemical reactions, whether of the hydrolysis, acid–base, or combustion type, take place at a definite rate and depend on the conditions of the system.
The most important of these conditions are the concentration of the reactants, the temperature, radiation effects, and the presence of a catalyst or inhibitor. The role of chemical and physical interactions in cleaning of organic-fouled reverse osmosis (RO) membranes is systematically investigated.
Fouling and cleaning experiments were performed with organic foulants (alginate and natural organic matter) that simulate effluent organic matter (EfOM) and selected cleaning agents using a laboratory-scale crossflow test by: It also discusses the processes leading to particulate (soot) formation.
It also considers appropriate combustion chemistry techniques for regulating the emissions related to these compounds. The combustion—or, more precisely, the oxidation—of CO and aromatic compounds has been discussed in. In order to comply with strict emission standards, a reduction in diesel particle matter emissions can be addressed by minimizing particle formation and by optimizing particle oxidation in the combustion chamber and in the exhaust and diesel particulate filter systems.
The characterization of soot morphology and nanostructure is necessary to understand the soot formation and oxidation by: 4. Probable mechanisms are discussed of the formation processes of pyrolytic carbon films and soot particles, based on experimental investigations of their formation rates.
Both are two-stage processes including nucleation and growth of nuclei. The formation of pyrolytic carbon from methane at temperatures below K is a molecular by: 9.
Physical and chemical aspects of combustion The chemical reactions. Combustion, with rare exceptions, is a complex chemical process involving many steps that depend on the properties of the combustible substance.
It is initiated by external factors such as heat, light, and sparks. The Role of Chain Mechanisms in Some Fundamental Combustion Phenomena; 2. Mechanisms and Modeling of Gas-Phase Aftertreatment Methods for NO Removal from Combustion Products; 3.
The Early Soot Particle Formation in Hydrocarbon Flames; 4. Soot Formation in Spherically Symmetric Droplet Combustion; 5. Some Aspects of Metal Particle Combustion; 6. Controlling soot emissions to the atmosphere will require overcoming large gaps in the understanding of soot formation and physical and chemical evolution during : Hope A.
Michelsen. Soot formation in combustion is a complex physical-chemical process. Modelling of soot formation in combustion has received great attention in recent years . As far as soot formation in flames Author: Andrea D’Anna.
It then turns to beneficiation and handling; combustion; and various partial or complete conversion technologies. The final chapter deals with some aspects of pollution and pollution control.
This book provides fairly detailed discussions on coal chemistry, including the molecular structure of coal.Solution combustion is an exciting phenomenon, which involves propagation of self-sustained exothermic reactions along an aqueous or sol–gel media. This process allows for the synthesis of a variety of nanoscale materials, including oxides, metals, alloys, and sulfides.
This Review focuses on the analysis of new approaches and results in the field of solution combustion synthesis (SCS Cited by: Soot and ash as residues from the combustion of peat briquettes were analysed by chemical and mineralogical methods.
The study aimed to characterize combustion in domestic boilers of two different emission classes. Ten samples of soot deposited in exhausting ways of boilers were obtained (five of each emission class). The analyses of organic substances in soot were performed using a Author: Jana Růžičková, Marek Kucbel, Helena Raclavská, Barbora Švédová, Konstantin Raclavský, Michal Šafář.