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The goal of this work is to investigate the role of existing C2 compounds in the plasma reactions of carbon tetrachloride (CCl4) decomposition. The experiment of CCl4 decomposition was carried out by gliding arc plasma. The decomposition products were dominated by CO, CO2, and Cl2. The conversion of CCl4 into Cl2 and (CO + CO2) reaches ∼ 50% and ∼ 40%, respectively. Other chlorinated compounds were suspected to be produced, such as COCl, COCl2, and C2 compounds. In order to prove the existence of those compounds, for example, chlorinated C2 compounds, a kinetic simulation was performed and cross-checked with the experimental results to clarify the reactions mechanism. [ABSTRACT FROM AUTHOR]

Decomposition of dichloromethane (CH 2 Cl 2 ) using a gliding plasma was examined and reported in this paper. The effects of initial concentrations of CH 2 Cl 2 , total gas flow rates, and input frequency have been studied to evaluate the performance of gliding arc on CH 2 Cl 2 decomposition. Using atmospheric pressure air as the carrier gas, experimental results indicate that the maximum conversion of CH 2 Cl 2 was 95.1% at a total gas flow rate of 180 L/hr containing 1% by volume of CH 2 Cl 2 . The reaction occurred at an exothermic condition and gaseous products are dominated by CO, CHCl 3 , and Cl 2 . CO 2 and CCl 4 are also detected in the product stream in small amounts. The conversion of CH 2 Cl 2 increases with the increasing applied voltage and decreasing total gas flow rate. [ABSTRACT FROM AUTHOR]

The decomposition of the chlorinated hydrocarbons CCl 4 and CHCl 3 in a gliding-arc plasma was examined. The effects of initial concentrations, total gas flow rates and power consumption were investigated. The conversion of the hydrocarbons mentioned above was relatively high. It could reach 80% for CCl 4 and 97% for CHCl 3 . In atmospheric air as a carrier gas, the reaction was exothermic, and the main products were CO 2 , CO and Cl 2 . The transformation into CCl 4 was also detected for the decomposition reaction of CHCl 3 . The conversion of these compounds increased with increasing frequency of power supplied and decreasing total gas flow rate. [ABSTRACT FROM AUTHOR]

Plasma processing of the chloromethane compounds (methylene chloride (CH 2 Cl 2 ), chloroform (CHCl 3 ) and carbon tetrachloride (CCl 4 )) diluted in atmospheric air using a gliding arc has been studied. Various injected initial chloromethane concentrations, total gas flow rates and power frequencies were used as the variables to investigate the discharge characteristics. This paper evaluates the phenomenon of chloromethane processing by gliding-arc plasma. [ABSTRACT FROM AUTHOR]

Decomposition of chlorinated hydrocarbons, CCl_4 and CHCl_3, in gliding plasma was examined. The effects of initial concentrations, total gas flow rates, and power consumption have been investigated. The conversion result was relatively high. It reached 80% for CCl_4 and 97% for CHCl_3. Using atmospheric air as the carrier gas, the plasma reaction occurred at exothermic reaction and the main products were CO_2, CO, and Cl_2. Transformation into CCl_4 was also detected for CHCl_3 decomposition reaction. The conversion of CCl_4 and CHCl_3 were increased with the increasing applied frequency and decreasing total gas flow rate. [ABSTRACT FROM AUTHOR]

Conversion of carbon dioxide (CO2) using gliding arc plasma was performed. The research was done to investigate the effect of variation of total gas flow rates and addition of auxiliary gases – N2, O2, air, water – to the CO2 conversion process. This system shows higher power efficiency than other nonthermal plasma methods. Experiment results indicate the conversion of CO2 reaches 18% at total gas flow rate of 0.8L/min and produces CO and O2 as the main gaseous products. Among auxiliary gases, only N2 gives positive effect on CO2 conversion and the power efficiency at N2 concentration of 95% and total gas flow rate of 2L/min increases about three times compared to pure CO2 process. [Copyright &y& Elsevier]

Abstract: The decomposition of a series of volatile organic compounds (VOCs) has been carried out by gliding arc, a new-interest type of plasma technology in our laboratory. The operation of gliding arc was done at ambient temperature and normal pressure. Feed compositions were containing 0.1–0.5% of aromatic VOCs and 1–8% of chlorinated VOCs diluted in atmospheric air and total flow rates were varied from 3 to 5L/min. Significant conversions (>50%) of VOCs with high destruction efficiency have been achieved in gliding arc plasma. [Copyright &y& Elsevier]