Download or read book Active Nitrogen at High Pressure written by John Franklin Noxon and published by . This book was released on 1957 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Active Nitrogen written by A. Nelson Wright and published by Elsevier. This book was released on 2012-12-02 with total page 615 pages. Available in PDF, EPUB and Kindle. Book excerpt: Active Nitrogen focuses on the experimental and theoretical investigations on active nitrogen. Divided into five chapters, the book starts by giving an introduction to the discovery of active nitrogen, the energy content, and the methods by which this may be produced. The succeeding part deals with light emissions from active nitrogen system. This discussion includes molecular spectrum of nitrogen, emission from atomic energy and condensed active nitrogen, emission from molecular species with electronic energy levels below and above 9.76 eV, and light-emitting systems of active nitrogen. The next part focuses on theories on active nitrogen. The theories discussed are long-lived Lewis-Rayleigh afterglow and short-lived, energetic afterglows. Numerical representations are provided to test the validity of the theories. Lastly, the discussions end with chemical reactions of active nitrogen. Topics contained in this part are text on recombination of N(4S) atoms; rate constants for reactions presumably induced by direct N(4S) attack; reactions caused by excited nitrogen molecular attack; and mechanism for reactions of active nitrogen that seem to influence direct N(4S) attack. The book is a valuable source of information for readers interested in the research on active nitrogen.
Download or read book Active Nitrogen written by A. Nelson Wright and published by Academic Press. This book was released on 2013-10-22 with total page 615 pages. Available in PDF, EPUB and Kindle. Book excerpt: Physical Chemistry, A Series of Monographs: Active Nitrogen presents the methods by which active nitrogen may be produced. This book is composed of five chapters that evaluate the energy content, molecular spectrum, and the emission of active nitrogen. Some of the topics covered in the book are the summary of light-emitting systems of active nitrogen; analysis of Long-Lived Lewis-Rayleigh Afterglow theory and Ionic theory of Mitra; reactions followed by induced light emission; and characteristics of homogeneous recombination. Other chapters deal with the analysis of metastable molecule theories and the mechanisms for reactions of active nitrogen involving direct N(4S) attack. The discussion then shifts to the rate constants for reactions induced by direct N(4S) attack. The evaluation of the Short-Lived Energetic Afterglow theory is presented. The final chapter is devoted to the examination of emission from molecular species with electronic energy levels below 9.76 eV. The book can provide useful information to physicists, students, and researchers.
Download or read book The Fixation of Atmospheric Nitrogen written by Joseph Knox and published by . This book was released on 1921 with total page 140 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Free Electrons in Active Nitrogen written by W. B. Kunkel and published by . This book was released on 1962 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The resonance shift in an S-band cavity was used to measure the free-electron density n in a continuous flow of rf excited active nitrogen in the mm Hg pressure range. N varied between 10 to the 7th power and 6 x 10 to the 9th power per cc and depended distinctly on the oxygen contamination. The ions formed presumably are NO+. By admixing known small amounts of nitric oxide to the stream it could be demonstrated that the ionization rate indeed varied linearly with the amount of NO added. At high pressures and large n the electron removal was by recombination and at low pressures and small n it was governed by ambipolar diffusion. The value of Dp/alpha was estimated at 10 to the 9th power mm Hg/cm. Since the NO must be practically completely dissociated by the active nitrogen, the required large ionization rate indicates that the mechanism probably involves formation of excited nitrogen molecules as an intermediate step. (Author).
Download or read book The Free Electrons in Active Nitrogen written by W. B. Kunkel and published by . This book was released on 1962 with total page 21 pages. Available in PDF, EPUB and Kindle. Book excerpt: The resonance shift in an S-band cavity was used to measure the free-electron density n in a continuous flow of rf excited active nitrogen in the mm Hg pressure range. N varied between 10 to the 7th power and 6 x 10 to the 9th power per cc and depended distinctly on the oxygen contamination. The ions formed presumably are NO+. By admixing known small amounts of nitric oxide to the stream it could be demonstrated that the ionization rate indeed varied linearly with the amount of NO added. At high pressures and large n the electron removal was by recombination and at low pressures and small n it was governed by ambipolar diffusion. The value of Dp/alpha was estimated at 10 to the 9th power mm Hg/cm. Since the NO must be practically completely dissociated by the active nitrogen, the required large ionization rate indicates that the mechanism probably involves formation of excited nitrogen molecules as an intermediate step. (Author).
Download or read book The Physical Properties of Active Nitrogen in Low density Flow written by James M. Benson and published by . This book was released on 1951 with total page 78 pages. Available in PDF, EPUB and Kindle. Book excerpt: An investigation of the physical properties of active nitrogen in low-density flow indicates that active nitrogen may be used for flow visualization without introducing excessive disturbances in the stream. Quantitative measurements of density in the flow may be obtained from certain restricted regions of the spectrum of the afterglow. The results are shown to disagree with Mitra's theory of the afterglow. The results appear to require that active nitrogen contain metastable molecules. Methods are described for the use of active nitrogen in shock tubes.
Download or read book Effect of High Pressures on the Flammability of Natural Gas air nitrogen Mixtures written by George William Jones and published by . This book was released on 1949 with total page 34 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Active Nitrogen written by Archibald Nelson Wright and published by . This book was released on 1968 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: LIGHT EMISSION FROM ACTIVE NITROGEN SYSTEMS; AFTERGLOW SPECIES, THEIR LIFETIMES AND CONCENTRATIONS; THEORIES OF ACTIVE NITROGEN; CHEMICAL REACTIONS OF ACTIVE NITROGEN.
Download or read book The Reaction of Active Nitrogen with Oxygen written by Athanasios S. Vlastaras and published by . This book was released on 1966 with total page 264 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book WHO Guidelines for Indoor Air Quality written by and published by World Health Organization. This book was released on 2010 with total page 488 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents WHO guidelines for the protection of public health from risks due to a number of chemicals commonly present in indoor air. The substances considered in this review, i.e. benzene, carbon monoxide, formaldehyde, naphthalene, nitrogen dioxide, polycyclic aromatic hydrocarbons (especially benzo[a]pyrene), radon, trichloroethylene and tetrachloroethylene, have indoor sources, are known in respect of their hazardousness to health and are often found indoors in concentrations of health concern. The guidelines are targeted at public health professionals involved in preventing health risks of environmental exposures, as well as specialists and authorities involved in the design and use of buildings, indoor materials and products. They provide a scientific basis for legally enforceable standards.
Download or read book An Investigation of Some Reactions of Active Nitrogen written by David R. Safrany and published by . This book was released on 1964 with total page 186 pages. Available in PDF, EPUB and Kindle. Book excerpt: The reactions of active nitrogen were studied in a fast-flow, low-pressure system using a mass spectrometer whose leak was located directly downstream from the reaction zone. Reactions of metastable N2(A3 & (+)u) molecules, produced by means of surface catalyzed excitation, were also studied. The results of the excited molecule experiments indicated that, in general, N2(A3 & (+)u) molecules do not play a major role in the reactions of active nitrogen with inorganic and organic substances such as: O2, O3, N2O, C2H2 and C2H4. The reactions of N-atoms with hydrocarbons were studied along the lines of previous workers. It was found that, contrary to earlier work, HCN is not the only major nitrogencontaining product formed, but N2 is also a substantial product. Under certain conditions, NH3 and CH3CN can also be major products. Ammonia added to the flame zone of the C2H2-active nitrogen reaction was found to react with CH radicals formed, yielding HCN. A general degradation mechanism is proposed involving the attack of the hydrocarbon, in general, by a radical other than the N-atom as the initial step. (Author).
Download or read book The Reactions of Active Nitrogen with Molecular Oxygen Atomic Oxygen and Hydrogen written by Constantine Mavroyannis and published by . This book was released on 1961 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: "For the reaction of nitrogen atoms with molecular oxygen, the nitrogen and oxygen atom concentrations were estimated, at different temperatures and pressures, by addition of excess N0 and measurement of N2O and NO produced. The rate constant was given by 2.3 x 10^12 exp(-5,900/RT) cc mole^-1 sec^-1. The maximum production of oxygen atoms was found to correspond to the maximum amount of HCN produced in the active nitrogen-ethylene reaction. A rate constant of 1.83(+- 0.2) x 10^15 cc^2 mole^-2 sec^-1 was determined for the reaction of nitrogen atoms with oxygen atoms, in the absence of molecular oxygen, at pressures of 3, 3.5 and 4 mm, in an unheated reaction tube. The nitrogen atom consumption was estimated by titrating active nitrogen with NO at different positions along the reaction tube. Using the same titration method, the rate constant for the decay of nitrogen atoms, in an unheated vessel, was found to have the value of 5.2 x 10^15 cc^2 mole^-2 sec^-1, with y= 7.5 (-+ 0.6) x 10^-5, in the pressure range from 0.5 to 4 mm. Under similar conditions, and by similar methods, a value of 4.87(+- 0.8) x 10^14 cc^2 mole^-2 sec^-l was obtained for the rate constant of the reaction between nitrogen atoms and hydrogen atoms, over the pressure range from 2.5 mm to 4.5 mm." --
Download or read book The Reaction of Active Nitrogen with Mixtures of Ethylene and Nitric Oxide written by E. Fersht and published by . This book was released on 1964 with total page 7 pages. Available in PDF, EPUB and Kindle. Book excerpt: The reaction of active nitrogen, produced in a condensed discharge at 1 mm pressure, with mixtures of ethylene and nitric oxide was studied with mixtures ranging in composition from pure ethylene to pure nitric oxide. The sum of HCN + 14N15N produced from mixtures of C2H4 and 15NO remained constant and equal to the HCN produced from pure C2H4 for NO concentrations up to 50 mole %. As more NO was added, this sum rose towards the value of 14N15N produced from pure 15NO. These data appear to lend support to the HCN yield from ethylene as the true measure of nitrogen atom concentration. It is suggested that 15NO also undergoes a concerted reaction with excited 14N14N molecules to produce 14N15N, and that these excited molecules can be quenched by collision with ethylene or methane without consuming nitrogen or forming HCN. (Author).
Download or read book Reactions of Active Nitrogen with Cyanogens and CD Radicals written by Catherine Haggart and published by . This book was released on 1959 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: "During the latter part of the nineteenth century, a number of investigators began to study the electrical excitation of gases at low pressures, generally with electrodeless discharges. Several of them found that certain gases emitted an afterglow for a few seconds after the current was discontinued. However, there was no serious study of the behaviour until Lewis (1), in 1900, discovered that pure nitrogen subjected to a condensed discharge, at low pressure, produced a "chamois-yellow" afterglow with a banded rather than a continuous spectrum. The most conspicuous bands were one red, two yellow and one green which he identified as four bands of the nitrogen spectrum." --
Download or read book Active Nitrogen written by John Murray Anderson and published by . This book was released on 1928 with total page 40 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Ammonia and the Nitrides written by Edward Bradford Maxted and published by . This book was released on 1921 with total page 136 pages. Available in PDF, EPUB and Kindle. Book excerpt:
