Drift Velocities of Slow Electrons in Krypton, Xenon, Deuterium, Carbon Monoxide, Carbon Dioxide, Water Vapor, Nitrous Oxide, and Ammonia

1962 ◽  
Vol 127 (6) ◽  
pp. 2084-2089 ◽  
Author(s):  
J. L. Pack ◽  
R. E. Voshall ◽  
A. V. Phelps
1930 ◽  
Vol 3 (3) ◽  
pp. 241-251 ◽  
Author(s):  
J. C. McLennan F.R.S. ◽  
J. V. S. Glass B.A.

This paper deals with the action of cathode rays on gases and gas mixtures. Methane, methane-oxygen mixtures, carbon monoxide and carbon monoxide-oxygen mixtures were examined. Methane gave small percentages of hydrogen and ethane. Methane and oxygen mixtures gave as gaseous products, carbon monoxide, carbon dioxide and hydrogen, the only other products being water and formic acid. The relative proportions of the products do not vary widely under a wide variation of conditions.The reaction was found to be of the first order with respect to pressure. The reaction rate increases linearly with the voltage up to a certain value, after which it becomes nearly independent of the voltage.The action of cathode rays on carbon monoxide produces carbon dioxide and a solid brown suboxide which is extremely soluble in water, and its composition corresponds to a formula (C3O)n. If the carbon monoxide is moist, no visible amount of solid or liquid is found and there is less carbon dioxide.Carbon monoxide-oxygen mixtures under the action of cathode rays form carbon dioxide. Presence of water vapor has a retarding effect on the reaction. For mixtures of the same composition the reaction rate is proportional to the total pressure. For dry mixtures the product increases with the carbon monoxide present; when moist it is much less, and independent of the carbon monoxide.


The authors’ experiments on the thermal conductivities of carbon monoxide and nitrous oxide were undertaken partly because very few determinations had been made previously, and partly on account of a consideration of other physical properties of these gases. Smith showed experimentally that the viscosities of nitrogen and carbon monoxide are equal, and a similar result was obtained in the case of carbon dioxide and nitrous oxide. Such results are indicated by the Kinetic Theory of Gases from the aspect of the equality of molecular weights in the two cases. Similar equalities are not anticipated, however, in the case of the thermal conductivities, as the conduction effect depends on a consideration of differences in molecular structure. The following table shows the values of the thermal conductivities and the viscosities of the four gases concerned, and illustrates the extent to which the thermal conductivities differ:—


1965 ◽  
Vol 43 (1) ◽  
pp. 96-101 ◽  
Author(s):  
A. B. Wittkower ◽  
R. P. Bastide ◽  
N. B. Brooks ◽  
P. H. Rose ◽  
L. Hopwood

The equilibrium fractions for a hydrogen-ion beam have been measured, from 10 to 50 keV, in the following gases or vapors: hydrogen (H2), helium (He), nitrogen (N2), oxygen (O2), neon (Ne), argon (Ar), krypton (Kr), xenon (Xe), nitrous oxide (N2O), deuterium (D2), water vapor (H2O), ammonia (NH3), methane (CH4), sulphur hexafluoride (SF6), butane (C4H10), 2,2-dimethylpropane (C5H12), carbon dioxide (CO2).


1982 ◽  
Vol 60 (22) ◽  
pp. 2876-2882 ◽  
Author(s):  
K. Hiraoka ◽  
K. Aoyama ◽  
T. Nakamura ◽  
S. Mochizuki ◽  
K. Mitsumori ◽  
...  

A study was made on the decomposition of PCB's in a radio-frequency glow discharge plasma. PCB's were completely decomposed in plasmas of a few Torr of oxygen, hydrogen, and water vapor. Gaseous products from PCB's in an oxygen plasma were carbon monoxide, carbon dioxide, water, hydrogen chloride, chlorine, and chlorine dioxide. Hazardous compounds such as phosgene and vinyl chloride were not detected by gc–ms analysis. The total quantity of oxygen flowed past the sample was only about three times the stoichiometric oxygen required for the perfect oxidation of PCB's. In a hydrogen plasma, PCB's gave ethane and isobutane as major gaseous products and several higher hydrocarbons as minor products. Almost all of the chlorine in PCB's was converted to hydrogen chloride. Major products from PCB's in a water vapor plasma were carbon dioxide, carbon monoxide, and hydrogen chloride. No other products were detected. The mechanisms for reactions occurring in plasmas are discussed. The importance of the wall effect for the formation of solid products is discussed.


Sign in / Sign up

Export Citation Format

Share Document