Download or read book Thermodynamic Studies in Metal Containing Flames written by D. E. Jensen and published by . This book was released on 1969 with total page 29 pages. Available in PDF, EPUB and Kindle. Book excerpt: Several different experimental techniques (flame-ion mass spectrometry microwave cavity resonance, electrostatic probes and absorption spectrophotometry) were applied to fuel-rich atmospheric-pressure H2/O2/N2 flames seeded with potassium in order to determine the thermochemistry of ions produced from additives containing tungsten, boron or tin. Addition of tungsten results in reductions in concentrations of free potassium atoms and in formation of stable W-containing negative ions. The derived enthalpy changes imply electron affinities for WO3 and HWO4 of approximately 305 and 400 kj/mole, respectively. The reaction K + H2WO4 = KHWO4 + H is found to be exothermic. Comparison of the apparently rapidly established dissociative electron attachments to HBO2 and HCl provides a value for the electron affinity of BO2. Reactions leading to formation of BO( - ) are discussed, and a lower limit for the electron affinity of BO of approximately 240 kj/mole is obtained. An examination of the positive ions produced by addition of tin compounds to these flames leads to a zero-point standard heat of formation for SnOH(+)(g). (Author).

Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1992 with total page 562 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Metal Vapours in Flames written by Cornelis Theodorus Joseph Alkemade and published by Pergamon. This book was released on 1982 with total page 1062 pages. Available in PDF, EPUB and Kindle. Book excerpt: The book is unique in comprising our present knowledge about the general state of, and the processes involving, metal vapours in combustion flames. It deals thoroughly with a great variety of experimental techniques, including many practical hints, and synthesizes the results in this field of research which are often scattered across publications in widely different areas of science and technology and over a large time span. An account is given of the results of recent and past flame experiments on the properties of metal species and the processes in which they take part. Properties and proc ...

Download or read book Metal Vapours in Flames written by C. Th. J. Alkemade and published by Elsevier. This book was released on 2013-10-22 with total page 1056 pages. Available in PDF, EPUB and Kindle. Book excerpt: The book is unique in comprising our present knowledge about the general state of, and the processes involving, metal vapours in combustion flames. It deals thoroughly with a great variety of experimental techniques, including many practical hints, and synthesizes the results in this field of research which are often scattered across publications in widely different areas of science and technology and over a large time span. An account is given of the results of recent and past flame experiments on the properties of metal species and the processes in which they take part. Properties and processes that are discussed 'in extenso' include the dissociation energy of metal compounds, collisional broadening of atomic lines, physical and chemical excitation and quenching of electric states, formation reactions of metal compounds, ionization and diffusion. Many of the topics and experimental methods discussed are also of interest in other fields of fundamental and applied science. In particular, explicit conclusions are drawn as to the analytical application of flame spectroscopy.

Download or read book U S Government Research Reports written by and published by . This book was released on 1962 with total page 162 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Flames and Flame Properties written by Defense Documentation Center (U.S.) and published by . This book was released on 1964 with total page 190 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Thermodynamic Studies on the Nitride Forming Reactions in Liquid Iron Alloys Containing Refractory and Rare Earth Metals written by Woo-Gwang Jung and published by . This book was released on 1988 with total page 80 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 1970 with total page 974 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Thermal Models of a Flame Arrester written by John C. Edwards and published by . This book was released on 1991 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Technical Publications Announcements with Indexes written by United States. National Aeronautics and Space Administration and published by . This book was released on 1962 with total page 1318 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Journal of Research of the National Bureau of Standards written by United States. National Bureau of Standards and published by . This book was released on 1981 with total page 792 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Handbook of Metal Ligand Heats and Related Thermodynamic Quantities written by James J. Christensen and published by . This book was released on 1983 with total page 802 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Energy Research Abstracts written by and published by . This book was released on 1993 with total page 906 pages. Available in PDF, EPUB and Kindle. Book excerpt: Semiannual, with semiannual and annual indexes. References to all scientific and technical literature coming from DOE, its laboratories, energy centers, and contractors. Includes all works deriving from DOE, other related government-sponsored information, and foreign nonnuclear information. Arranged under 39 categories, e.g., Biomedical sciences, basic studies; Biomedical sciences, applied studies; Health and safety; and Fusion energy. Entry gives bibliographical information and abstract. Corporate, author, subject, report number indexes.

Download or read book Air Force Research Resum s written by and published by . This book was released on with total page 572 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Research in Progress written by and published by . This book was released on 1973 with total page 494 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book List of Bureau of Mines Publications and Articles with Subject and Author Index written by United States. Bureau of Mines and published by . This book was released on 1970 with total page 450 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book High Temperature Oxidation Chemical Kinetics and Thermodynamics of the Alkali Metals written by and published by . This book was released on 1988 with total page 22 pages. Available in PDF, EPUB and Kindle. Book excerpt: The present phase of our research to understand the high temperature oxidation chemistry of the alkali metals in flames now has been completed and has successfully explained their behavior. This basic understanding is a fundamental and initial step in resolving their nature as suppressants of gun muzzle flash and rocket afterburning. The flame chemistries of lithium, sodium and potassium now have been completely resolved and those of the two remaining alkalis, rubidium and cesium, require only final analysis but appear to follow the general observed patterns of behavior. This laser induced fluorescence study, using a matrix of about then fuel-lean diatomic hydrogen/oxygen/nitrogen flames of a large variety of stoichiometries and having different flame temperatures with alkali metals of different kinetic and thermochemical properties is a particularly severe test for any analysis. Because of this, there is a significant confidence in the derived values of the dissociation energies of the MOH and MO2 compounds. Moreover, the kinetic rate constants obtained for these high temperatures are consistent with lower temperature literature values in all cases where such data exist. Additionally, the kinetics whereby oxidation is predominantly via reactions with O2 and water, and regeneration is via reactions with flame radicals, principally hydroxyl, provides a kinetic cycle in which the alkali metal can reduce radical concentration levels. Undoubtedly, this is one, if not the principal mechanism explaining the inhibition of gun muzzle flash by these salts and merits further studies but not with larger concentrations of alkali salts.