Download or read book Molecular Beam Mass Spectrometry Measurement of 1 butene Pyrolysis and Combustion Products written by Xian Zhong and published by . This book was released on 1998 with total page 878 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Quantitative Measurement of Pyrolysis and Combustion Species Concentration by Molecular beam sampling mass spectrometry written by Xian Zhong and published by . This book was released on 1992 with total page 220 pages. Available in PDF, EPUB and Kindle. Book excerpt: A molecular-beam-sampling apparatus utilizing both a time-of-flight mass spectrometer with vacuum ultraviolet (VUV) photoionization and a quadrupole mass spectrometer with electron impact ionization is described. These systems are used to analyze reactants and products, as well as reactive intermediates, from flow tube experiments at reduced pressures and elevated temperatures. It is shown that the quadrupole signal sensitivity can be predicted using literature cross sections which are based upon the atom hybridization within the various molecules. Measurements of the VUV photoionization sensitivity for stable species led to development of a group additivity approach to predict cross sections. This approach was extended to reactive intermediates, and detailed comparisons of quadrupole and TOF data shows a very good agreement between the two techniques. The two techniques are compensation of each other and provide the full information we need. It is also shown how the minimal fragmentation achieved with the VUV source leads to much more accurate species concentration measurements for reactive intermediates.
Download or read book Pyrolysis gas Chromatography mass Spectrometry Of Polymeric Materials Second Edition written by Peter Kusch and published by World Scientific. This book was released on 2023-08-28 with total page 383 pages. Available in PDF, EPUB and Kindle. Book excerpt: Readers will find many practical applications of pyrolysis-GC/MS as well as R&D usage in this newly revised and expanded edition. Detailed experimental descriptions for the identification of synthetic polymers and copolymers are included. This volume presents the current state of analytical pyrolysis, and contains full identification of several classes of polymers/copolymers and biopolymers that readers will find helpful. Structures and functions of various types of pyrolyzers are explored, as well as the results of the pyrolysis-gas chromatographic-mass spectrometric identification of synthetic polymers/copolymers and biopolymers at 700°C.Practical applications of this hyphenated technique, detailing the analysis of microplastics, failure analysis in the automotive industry and solutions for technological problems are provided. Numerous practical applications of pyrolysis-GC/MS, for industrial and R&D usage, will be of benefit to Chemists and Engineers, as well as for students of Chemistry and Polymer Sciences.
Download or read book Pyrolysis gas Chromatography Mass Spectrometry Of Polymeric Materials written by Peter Kusch and published by World Scientific. This book was released on 2018-10-08 with total page 268 pages. Available in PDF, EPUB and Kindle. Book excerpt: The methodology of analytical pyrolysis-GC/MS has been known for several years, but is seldom used in research laboratories and process control in the chemical industry. This is due to the relative difficulty of interpreting the identified pyrolysis products as well as the variety of them. This book contains full identification of several classes of polymers/copolymers and biopolymers that can be very helpful to the user. In addition, the practical applications can encourage analytical chemists and engineers to use the techniques explored in this volume.The structure and the functions of various types of pyrolyzers and the results of the pyrolysis-gas chromatographic-mass spectrometric identification of synthetic polymers/copolymers and biopolymers at 700°C are described. Practical applications of these techniques are also included, detailing the analysis of microplastics, failure analysis in the automotive industry and solutions for technological problems.
Download or read book Pyrolysis Mass Spectrometry of Recent and Fossil Biomaterials written by H.L.C. Meuzelaar and published by Elsevier. This book was released on 2000-04-01 with total page 309 pages. Available in PDF, EPUB and Kindle. Book excerpt: Pyrolysis Mass Spectrometry of Recent and Fossil Biomaterials
Download or read book Dissertation Abstracts International written by and published by . This book was released on 1998 with total page 726 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Mass Spectrometry Bulletin written by and published by . This book was released on 1999 with total page 594 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Pyrolysis Molecular Beam Mass Spectrometry MBMS Analysis of Native Prairie Soils written by and published by . This book was released on 2005 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Proceedings of the ASMS Conference on Mass Spectrometry and Allied Topics written by and published by . This book was released on 1992 with total page 2284 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book American Doctoral Dissertations written by and published by . This book was released on 1997 with total page 806 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Analytical Pyrolysis written by Kent J Voorhees and published by Butterworth-Heinemann. This book was released on 2013-10-22 with total page 497 pages. Available in PDF, EPUB and Kindle. Book excerpt: Analytical Pyrolysis: Techniques and Applications provides an overview of analytical pyrolysis applied to geochemistry, biology, polymers, and biomass. This book presents a survey of basic phenomena, data analysis, and instrumentation. Organized into 15 chapters, this book begins with an overview of mass spectrometry in developing ion sources that are applicable to materials that either have low volatility, high molecular weight, are thermally unstable or some combination of the three. This text then examines the role of thermal processes in many of the desorption methods. Other chapters consider desorption techniques, which are closely allied to analytical pyrolysis. This book discusses as well the Flash Vacuum Pyrolysis/Field Ionization Mass Spectrometry (FVP/FIMS) technique, which is based on a direct link between the pyrolysis unit and a double focusing mass spectrometer. The final chapter deals with inert atmosphere poly (vinyl chloride) (PVC) thermal decomposition. This book is a valuable resource for chemists and researchers.
Download or read book Molecular Beam Sampling Mass Spectrometry of High Heating Rate Pyrolysis Description of Data Acquisition System and Pyrolysis of HMX in a Polyurethane Binder written by Richard A. Beyer and published by . This book was released on 1978 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt: The data acquisition capability of the time-of-flight mass spectrometer used with the molecular beam sampling system has been expanded. An oscilloscope intensity-modulated raster technique using negative film scanned by a microdensitometer provides simultaneous semi-quantitative time-resolved mass spectra of all masses up to 160 amu with time resolution down to 10 ms. A system of parallel sample/hold channels which follow predetermined masses with time resolution near that of the spectrometer cycle time has been assembled and shown to have good dynamic range, adequate mass resolution, and provide good reproducibility. This system has been used to study the products of low pressure pyrolysis of nitrocellulose and cyclotetramethylene tetranitramine/polyurethane binder. Using a carbon dioxide laser for heating the samples up to 5000 deg/s heating rate effects are clearly demonstrated for NC but are not observed for HMX/PU. Relative amounts of the major decomposition species observed for the HMX/PU were nitrous oxide, 100; nitrogen dioxide, 54; hydrogen cyanide, 42; formaldehyde, 39; and nitric oxide, 27. The large amounts of nitrogen dioxide is compatible with the breaking of the N-N bond as the first step of the thermal decomposition of HMX. (Author).
Download or read book Chemical Abstracts written by and published by . This book was released on 2002 with total page 2668 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Chemical and Physical Processes in Combustion written by Combustion Institute (U.S.) Eastern States Section. Fall Technical Meeting and published by . This book was released on 1991 with total page 540 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Mathematical Modelling of Gas Phase Complex Reaction Systems Pyrolysis and Combustion written by and published by Elsevier. This book was released on 2019-06-21 with total page 1034 pages. Available in PDF, EPUB and Kindle. Book excerpt: Mathematical Modelling of Gas-Phase Complex Reaction Systems: Pyrolysis and Combustion, Volume 45, gives an overview of the different steps involved in the development and application of detailed kinetic mechanisms, mainly relating to pyrolysis and combustion processes. The book is divided into two parts that cover the chemistry and kinetic models and then the numerical and statistical methods. It offers a comprehensive coverage of the theory and tools needed, along with the steps necessary for practical and industrial applications. Details thermochemical properties and "ab initio" calculations of elementary reaction rates Details kinetic mechanisms of pyrolysis and combustion processes Explains experimental data for improving reaction models and for kinetic mechanisms assessment Describes surrogate fuels and molecular reconstruction of hydrocarbon liquid mixtures Describes pollutant formation in combustion systems Solves and validates the kinetic mechanisms using numerical and statistical methods Outlines optimal design of industrial burners and optimization and dynamic control of pyrolysis furnaces Outlines large eddy simulation of turbulent reacting flows
Download or read book Bibliography of Mass Spectroscopy Literature for 1971 written by and published by . This book was released on 1973 with total page 626 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Pyrolysis of Organic Molecules Relevant to Combustion as Monitored by Photoionization Time of flight Mass Spectrometry written by Kevin Howard Weber and published by . This book was released on 2010 with total page 226 pages. Available in PDF, EPUB and Kindle. Book excerpt: Flash pyrolysis coupled to molecular beam extraction and single photon ionization time-of-flight mass spectrometry along with quantum chemical calculations are employed to study the pyrolysis of organic molecules with relevance to combustion processes. Branching ratios for the molecular elimination and bond fission pathways was achieved for ethyl and propyl iodides providing information about the nature of the mechanism with relation to chemical structure. Similarly, the decompositions of a series of alkyl methyl ethers, whose anti-knock ability in commercial fuels is attributed to the molecular elimination pathway, was investigated to examine the competition of primary and subsequent homolyses at higher temperatures, which tend to promote "knock". The isomerization/decomposition of isoprene was looked at in detail with special attention to the formation of soot precursor, most notably the "first ring" benzene. Cyclopentadiene and methylcyclopentadiene are known to be highly sooting fuels and were pyrolyzed to study the initial steps in aromatization. The pyrolysis of cyclohexene, cyclopentene, and 1,4-cyclohexadiene were conducted to facilitate interpretation of aromatic formation and to compare experimental results with well established mechanisms. Finally, the pyrolysis of methylcyclohexane, an important component some jet fuels, was studied.
