Decomposition of PCB's in the radio-frequency glow discharge plasmas of oxygen, hydrogen, and water vapor

1982 ◽  
Vol 60 (22) ◽  
pp. 2876-2882 ◽  
Author(s):  
K. Hiraoka ◽  
K. Aoyama ◽  
T. Nakamura ◽  
S. Mochizuki ◽  
K. Mitsumori ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Carbon Monoxide ◽  
Water Vapor ◽  
Glow Discharge ◽  
Radio Frequency ◽  
Hydrogen Chloride ◽  
Hydrogen Plasma ◽  
Glow Discharge Plasma ◽  
Radio Frequency Glow Discharge ◽  
Gaseous Products

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.

scholarly journals Highly-reactive haloester surface initiators for ARGET ATRP readily prepared by radio frequency glow discharge plasma

2019 ◽  
Vol 14 (4) ◽  
pp. 041006 ◽  
Author(s):  
Marvin M. Mecwan ◽  
Michael J. Taylor ◽  
Daniel J. Graham ◽  
Buddy D. Ratner
Keyword(s):  
Glow Discharge ◽  
Radio Frequency ◽  
Discharge Plasma ◽  
Glow Discharge Plasma ◽  
Radio Frequency Glow Discharge ◽  
Arget Atrp

ACTION OF HIGH SPEED ELECTRONS ON METHANE, OXYGEN AND CARBON MONOXIDE

1930 ◽  
Vol 3 (3) ◽  
pp. 241-251 ◽  
Author(s):  
J. C. McLennan F.R.S. ◽  
J. V. S. Glass B.A.
Keyword(s):  
Carbon Dioxide ◽  
Carbon Monoxide ◽  
Water Vapor ◽  
Formic Acid ◽  
Total Pressure ◽  
High Speed ◽  
Reaction Rate ◽  
First Order ◽  
Gaseous Products ◽  
Retarding Effect

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.

scholarly journals A study of reaction mechanisms of methane in a radio-frequency glow discharge plasma using radical and ion scavengers

1985 ◽  
Vol 63 (11) ◽  
pp. 2899-2905 ◽  
Author(s):  
K. Hiraoka ◽  
K. Aoyama ◽  
K. Morise
Keyword(s):  
Glow Discharge ◽  
Radio Frequency ◽  
Reaction Mechanisms ◽  
Experimental Error ◽  
Discharge Plasma ◽  
Glow Discharge Plasma ◽  
Relative Importance ◽  
Radio Frequency Glow Discharge ◽  
Radical Processes

When 1 Torr of methane was decomposed in a radio-frequency glow discharge plasma, ethane, ethylene, and acetylene were produced as major products. In order to determine the relative importance of radical and ionic processes for the formation of these major products, iodine and ammonia were used as radical and ion scavengers, respectively. It was found that the major products were formed mainly by radical processes and the contribution of ionic processes is within the experimental error. The mechanisms for the formation of ethane, ethylene, acetylene, and C3 ~ C4 compounds were discussed.

scholarly journals Application of radio frequency glow discharge plasma for enhancing adhesion bonds in polymer/polymer joints

2006 ◽  
Vol 103 (3) ◽  
pp. 2073-2073
Author(s):  
B. Lapcíková ◽  
L. Lapcík ◽  
P. Smolka ◽  
R. Dlabaja ◽  
D. Hui
Keyword(s):  
Glow Discharge ◽  
Radio Frequency ◽  
Discharge Plasma ◽  
Glow Discharge Plasma ◽  
Radio Frequency Glow Discharge
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