CARBON MONOXIDE CHEMICAL LASER UTILIZING A FAST FLOW SYSTEM

1970 ◽  
Vol 16 (3) ◽  
pp. 117-118 ◽  
Author(s):  
Curt Wittig ◽  
J. C. Hassler ◽  
P. D. Coleman
Keyword(s):  
Carbon Monoxide ◽  
Flow System ◽  
Chemical Laser ◽  
Fast Flow

THE REACTION OF HYDROGEN ATOMS WITH KETENE

1964 ◽  
Vol 42 (1) ◽  
pp. 1-9 ◽  
Author(s):  
Nick Demchuk ◽  
H. Gesser
Keyword(s):  
Carbon Monoxide ◽  
Gas Phase ◽  
Surface Reaction ◽  
Flow System ◽  
Minor Amount ◽  
Phase Reaction ◽  
Hydrogen Atoms ◽  
A Chain ◽  
Fast Flow ◽  
A Minor

The gas-phase reaction of atomic hydrogen with ketene has been investigated over a temperature range of −130° to 232 °C using a low-pressure, fast-flow system. In most cases methane, carbon monoxide, and ethane were the major products, but trace amounts of glyoxal were also detected. Above −96 °C. considerable evidence exists for the occurrence of a chain reaction carried by HCO radicals. The surface reaction at −196 °C produced methane and glyoxal predominantly with only a minor amount of carbon monoxide.

Continuous Wave Carbon Monoxide Chemical Laser

1971 ◽  
Vol 55 (12) ◽  
pp. 5523-5532 ◽  
Author(s):  
Curt Wittig ◽  
J. C. Hassler ◽  
P. D. Coleman
Keyword(s):  
Carbon Monoxide ◽  
Continuous Wave ◽  
Chemical Laser

The Rate of Recombination of H Atoms in the Presence of NH3

1973 ◽  
Vol 51 (22) ◽  
pp. 3771-3773 ◽  
Author(s):  
L. Teng ◽  
C. A. Winkler
Keyword(s):  
Rate Constant ◽  
Pressure Range ◽  
Flow System ◽  
Carrier Gas ◽  
A Value ◽  
Fast Flow

The rate constant for the homogeneous recombination of H atoms in the presence of NH3, with He as carrier gas, has been determined at 298°K in a fast flow system, over the pressure range 1.50 to 4.55 Torr, using e.s.r. technique. A value of either 4.00 × 1016 or 5.14 × 1016 cm6 mol−2 s−1 was calculated, depending upon the rate constant taken, or estimated, from the literature for the recombination in the presence of helium.

Vibrational energy distribution in HF formed by elimination from activated CH3CF3 and CH2CF2

1970 ◽  
Vol 48 (18) ◽  
pp. 2919-2930 ◽  
Author(s):  
P. N. Clough ◽  
J. C. Polanyi ◽  
R. T. Taguchi
Keyword(s):  
Rate Constants ◽  
Vibrational Energy ◽  
Flow System ◽  
Relative Rate ◽  
Elimination Reaction ◽  
Vibrationally Excited ◽  
Vibrational Levels ◽  
Relative Rate Constants ◽  
Fast Flow ◽  
Vibrational Energy Distribution

The combination–elimination reaction CH3 + CF3 → CH3CF3† → CH2CF2 + HF has been studied in a fast-flow system. Infrared chemiluminescence arising from the HF product has been observed from vibrational levels v = 1–4, and relative rate constants, k(v), have been obtained for HF formation in these levels. A study has also been made of the reaction CH2CF2 + Hg*(63P1) → CHCF + HF + Hg(61S0), which has been found to produce vibrationally-excited HF. Relative rate constants k(v) for vibrational levels v = 1–4 have been obtained. It appears that channelling of the potential energy into HF vibration, in the course of the elimination step, is more efficient in the first than in the second of these reactions. In the second reaction HF is eliminated with considerable rotational excitation.

THE REACTION OF ACTIVE NITROGEN WITH ETHANOL

1965 ◽  
Vol 43 (4) ◽  
pp. 935-939 ◽  
Author(s):  
P. A. Gartaganis
Keyword(s):  
Flow System ◽  
Methyl Radicals ◽  
Kcal Mole ◽  
Hydrogen Atoms ◽  
Active Nitrogen ◽  
Condensed Discharge ◽  
Preliminary Study ◽  
Fast Flow ◽  
Ethyl Radicals ◽  
Water Hydrogen

The reaction of active nitrogen with ethanol has been investigated in the range 300 to 593 °K using a modified condensed-discharge Wood–Bonhoeffer fast-flow system. The only condensable products found in appreciable amounts were hydrogen cyanide and water. Hydrogen was the main noncondensable product. A very small amount of acetaldehyde was also formed along with traces of ethane, ethylene, methane, acetonitrile, cyanogen, and probably carbon monoxide. The overall activation energy is 3.4 kcal/mole. It is postulated that the mechanism consists of the formation of two fragments NC2H5 and OH, from which the condensable products result as follows:[Formula: see text]A number of products found in trace quantities are produced by concomitant reactions of the hydrogen atoms with methyl radicals, and with ethanol as well as by disproportionation of ethyl radicals to produce ethane and ethylene. A preliminary study of the reaction of active nitrogen with isopropanol indicated that the energy of activation is in line with the energies of activation of methanol and ethanol.

Absolute absorption cross sections at high resolution in the A2Πi – X2Πi band system of ClO

1984 ◽  
Vol 62 (5) ◽  
pp. 473-486 ◽  
Author(s):  
S. A. Barton ◽  
J. A. Coxon ◽  
U. K. Roychowdhury
Keyword(s):  
Cross Sections ◽  
Column Density ◽  
Flow System ◽  
Band System ◽  
Nonlinear Least Squares ◽  
Synthetic Spectrum ◽  
Electronic Transition Moment ◽  
Chlorine Monoxide ◽  
Fast Flow ◽  
Least Squares Techniques

Chlorine monoxide (ClO) has been produced at temperatures near 315 K in a fast-flow system at total pressures (of argon diluent) in the range 1.0–2.0 mm Hg. The transmittance of ultraviolet radiation has been determined with a spectral resolution of 0.0054 nm for all 35ClO ν′–0 A2Π3/2 – X2Π3/2 sub-bands in the range 3 ≤ ν′ ≤ 12 (305.9–274.9 nm). The ClO column density obtained with 8 or 12 traversals of the radiation along an 80 cm cell was in the range 1.0–2.0 × 1017 cm−2.The experimental transmittance profiles for each sub-band have been reproduced closely by synthetic spectrum calculations. The parameters required as input to the programs were optimized by nonlinear least-squares techniques. The fitted (Lorentzian) linewidths are on average more than double those previously reported from visual estimates of linewidths on photographic plates. The fitted band strengths lead to a well-defined electronic transition moment variation for the A – X system of ClO, which is in excellent agreement with an earlier determination by Mandelman and Nicholls from spectra at lower resolution (0.22 nm) with unresolved rotational structure.

scholarly journals Rapid synthesis of gold nanoparticles with carbon monoxide in a microfluidic segmented flow system

2019 ◽  
Vol 4 (5) ◽  
pp. 884-890 ◽  
Author(s):  
He Huang ◽  
Hendrik du Toit ◽  
Sultan Ben-Jaber ◽  
Gaowei Wu ◽  
Luca Panariello ◽  
...  
Keyword(s):  
Carbon Monoxide ◽  
Gold Nanoparticles ◽  
Flow System ◽  
Segmented Flow ◽  
Rapid Synthesis ◽  
Microfluidic Reactor ◽  
System P ◽  
Fast Synthesis

A microfluidic reactor offers a controllable and convenient platform for fast synthesis of gold nanoparticles with carbon monoxide.

A fast flow carbon monoxide laser

1973 ◽  
Vol 9 (1) ◽  
pp. 195-195
Author(s):  
T. Kan ◽  
W. Whitney ◽  
M. Pablo
Keyword(s):  
Carbon Monoxide ◽  
Fast Flow

Oscillations, glow and ignition in carbon monoxide oxidation in an open system II. Theory of the oscillatory ignition limit in the c. s. t. r

1985 ◽  
Vol 402 (1823) ◽  
pp. 187-204 ◽  
Keyword(s):  
Carbon Monoxide ◽  
Open System ◽  
Flow System ◽  
Ignition Limit ◽  
Critical Conditions ◽  
Self Heating ◽  
Algebraic Expressions ◽  
Radical Concentration ◽  
The Mean ◽  
Oxidation Of Carbon Monoxide

The oxidation of carbon monoxide in the presence of hydrogen can produce a single ignition pulse in a closed vessel and repetitive, i. e. oscillatory, ignition in an open system. It is possible to predict the locus of critical conditions on a map of reactant pressure, p , against vessel temperature, T a , in a flow system by a treatment based on the change in local stability of the stationary state. Even the very simplest kinetic model for the CO + H 2 + O 2 reaction allows satisfactory predictions of the dependence of the critical pressure on T a , and of the displacement of such p – T a peninsulae as the mixture composition (CO : H 2 ratio) is varied. Many of the results can be obtained in terms of simple algebraic expressions. The relation between this approach and classical treatments of criticality based on the unbounded growth of the steady-state radical concentration or on tangency conditions (chain–thermal theory) is investigated. Oscill­atory periods (the interval between successive ignition pulses) are calcu­lated, and the variation in the mean residence time arising from the change in the number of moles during reaction and the accompanying self-heating is discussed.

Sign in / Sign up

Export Citation Format

Share Document