Download or read book A Shock Tube Study of the Reaction Between H2 and CO2 written by John Carter Matthews and published by . This book was released on 1965 with total page 278 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book A Shock Tube Study of the H2 O2 CO Ar and H2 N2O CO Ar Systems written by Anthony M. Dean and published by . This book was released on 1977 with total page 33 pages. Available in PDF, EPUB and Kindle. Book excerpt: Emissions at 450 nm and 4.27 micrometers have been measured when a variety of mixtures containing H2, CO, either O2 or N2O, and Ar were heated behind reflected shock waves to temperatures of 2000-2850 K and total concentrations near 5 x 10 to the 18th power molecule/cc. These emissions were used to obtain absolute concentration - time data for both oxygen atoms and carbon dioxide. The data were then compared to the results of numerical integrations of the likely mechanisms. It was observed that quantitative agreement between calculations and observations were obtained for the H2/CO/O2/Ar system using recent high temperature literature rate constants. For the H2/CO/N2O/Ar system, the rate constant for the reaction: H + N2O yields N2 + OH was adjusted so as to fit the data. Here it was found that a good fit to both (O) and (CO2) profiles could be achieved with k = 3 x 10 to the -9th power exp( -113kJ/RT) cc/molecule. Comparison to data at lower temperatures suggests that this might be another example of a 'Non-Arrhenius' rate constant. The implications of these results to studies of hydrocarbon oxidation are discussed. (Author).

Download or read book A Shock Tube Study of Reactions in the H2 O2 Mechanism written by David Alan Masten and published by . This book was released on 1990 with total page 276 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book High temperature Chemical Kinetic Study of the H2 CO CO2 NO Reaction System written by Casimir J. Jachimowski and published by . This book was released on 1975 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book A shock tube study of reaction rates in the H2 NO NH3 NO and NH3 O2 written by Joseph Duxbury and published by . This book was released on 1974 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book A Shock tube Investigation of the Chemical Kinetics of NOC OA r Mixtures written by Lewis Phillip Leibowitz and published by . This book was released on 1969 with total page 778 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Shock Tube in High temperature Chemical Physics written by Alfred Gordon Gaydon and published by . This book was released on 1963 with total page 344 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book A shock tube study of the hydrogen oxygen reaction written by Dennis Leon Ripley and published by . This book was released on 1967 with total page 442 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book A Shock Tube Study of the Reaction Between Hydrogen and Nitric Oxide written by Peter Craggs and published by . This book was released on 1976 with total page 68 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book A Shock Tube Study of Reaction Rates in the H2 NO NH3 NO and NH3 O2 Systems written by J. Duxbury and published by . This book was released on 1975 with total page 223 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Experimental and Analytical Study of the H2 air Reaction Kinetics Using a Standing wave Normal Shock written by Roger A. Strehlow and published by . This book was released on 1967 with total page 30 pages. Available in PDF, EPUB and Kindle. Book excerpt: An experimental method was devised whereby the macroscopic chemical reaction history can be traced from wall pressure measurements in a high speed reacting gas in a tube. The experiments were conducted with H2 and vitiated air, and the data were compared with calculated pressure profiles using recent reaction kinetic information obtained from shock tubes. Good agreement between experiment and calculation was found when the flow was steady and no oscillations were present, indicating that the kinetics which govern the chemical reactions in shock tube experiments can be reproduced with the standing-wave experiment. Wall effects are evaluated. In addition, a semi-empirical analysis was made of the ignition delay and recombination, with the assumption that the two-body reactions are essentially in equilibrium during the slower recombination period. The mathematics of this approach is simple and is potentially useful with machine computations involving chemistry and mixing, or chemistry and aerodynamics. Finally, a short experiment with methane combustion in the tube produced similar phenomena, indicating that the method may be useful for determining rates of heat release for gases where little is known of the kinetics. (Author).

Download or read book Shock tube Study of the Reaction H O2 Ar rightward pointing Arrow HO2 Ar written by Casimir J. Jachimowski and published by . This book was released on 1972 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book A SHOCK TUBE STUDY OF H2 SF6 REACTIONS written by Jerry F. Bott and published by . This book was released on 1970 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt: Shock tube studies have been made of SF6 dissociation in the presence of H2 at temperatures between 1734 and 1848K and pressures of about 1 atm. During the reaction, SF6 concentration was monitored with measurements of the IR emission at 11.0 microns. The measurements with and without H2 were the same within the experimental error, indicating that H2 is no more effective than argon in dissociating SF6. Spectroscopic measurements of the spectral profile of the 10.6 micron band of SF6 indicated a shift in the maximum intensity from 10.6 microns at room temperature to 11.0 microns at 1780K. (Author).

Download or read book High Temperature Kinetic Study of the Reactions H O2 Oh O and O H2 Oh H in H2 O2 System by Shock Tube Laser Absorption Spectroscopy written by National Aeronautics and Space Administration (NASA) and published by Createspace Independent Publishing Platform. This book was released on 2018-07-17 with total page 126 pages. Available in PDF, EPUB and Kindle. Book excerpt: The reactions: (1) H + O2 = OH + O; and (2) O + H2 = OH + H are the most important elementary reactions in gas phase combustion. They are the main chain-branching reaction in the oxidation of H2 and hydrocarbon fuels. In this study, rate coefficients of the reactions and have been measured over a wide range of composition, pressure, density and temperature behind the reflected shock waves. The experiments were performed using the shock tube - laser absorption spectroscopic technique to monitor OH radicals formed in the shock-heated H2/O2/Ar mixtures. The OH radicals were detected using the P(1)(5) line of (0,0) band of the A(exp 2) Sigma(+) from X(exp 2) Pi transition of OH at 310.023 nm (air). The data were analyzed with the aid of computer modeling. In the experiments great care was exercised to obtain high time resolution, linearity and signal-to-noise. The results are well represented by the Arrhenius expressions. The rate coefficient expression for reaction (1) obtained in this study is k(1) = (7.13 +/- 0.31) x 10(exp 13) exp(-6957+/- 30 K/T) cu cm/mol/s (1050 K less than or equal to T less than or equal to 2500 K) and a consensus expression for k(1) from a critical review of the most recent evaluations of k(1) (including our own) is k(1) = 7.82 x 10(exp 13) exp(-7105 K/T) cu cm/mol/s (960 K less than or equal to T less than or equal to 5300 K). The rate coefficient expression of k(2) is given by k(2) = (1.88 +/- 0.07) x 10(exp 14) exp(-6897 +/- 53 K/T) cu cm/mol/s (1424 K less than or equal to T less than or equal to 2427 K). For k(1), the temperature dependent A-factor and the correlation between the values of k(1) and the inverse reactant densities were not found. In the temperature range of this study, non-Arrhenius expression of k(2) which shows the upward curvature was not supported. Ryu, Si-Ok and Hwang, Soon Muk and Dewitt, Kenneth J. Unspecified Center ABSORPTION SPECTROSCOPY; COMBUSTION CHEMISTRY; GAS MIXTURES; HIGH TEMPERATURE TESTS; HYDROGEN; HYDROX...

Download or read book Kinetics of Fast Reactions in the Gas Phase written by Sydney Charles Barton and published by . This book was released on 1966 with total page 466 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book A Shock Tube Study of Recombination in the Lean Hydrogen oxygen Reaction Based on the Infrared Emission from Water Vapor written by Larry S. Blair and published by . This book was released on 1969 with total page 122 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Shock Tube Studies of Nitrogen Vibrational Relaxation and Methane Oxidation written by Donald R. White and published by . This book was released on 1970 with total page 62 pages. Available in PDF, EPUB and Kindle. Book excerpt: The report summarizes the research performed under this contract in the general areas of vibrational relaxation and shock tube chemistry. The authors have unsuccessfully attempted to generate cylindrical detonations in H2-O2 under conditions such that the reaction zone and shock front could be observed first to separate and hopefully then to reattach. The induction time for methane has been measured over a wide range of pressure, temperature, stoichiometry, and diluent using both incident and reflected shock waves. An activation energy of about 51 kcal/mole is found, larger than that of several other investigators largely due to our observation of longer times at the lower temperatures. In the H2/CO/O2 system the combination of flame and interferometric shock data has earlier proved valuable in selection from among alternative kinetic schemes, but laminar reaction zones have been unattainable in methane oxidation without use of an additive to speed the reaction. Qualitatively, acetone, methyl alcohol, and acetylene all accelerate the reaction to a decreasing extent. Hydrogen has been used as an additive to obtain density profiles adequate for comparison with computed profiles using a complex reaction scheme. A first attempt at computer reconciliation of flame and shock tube data has been made with encouraging results, and changes to be incorporated in the next iteration of the kinetic system have been identified. (Author).