CF4/O2/He Reaction Chemistry in an Atmospheric Pressure Plasma Jet
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Yongho Kim
Abstract
An atmospheric pressure plasma jet (APPJ) operated with a CF4/O2/He gas mixture has recently been demonstrated to decontaminate actinide materials such as plutonium and uranium. However, a comprehensive study of the chemical kinetics for an atmospheric plasma containing CF4/O2/He does not exist. To understand and optimize the decontamination process, ultraviolet (UV) absorption spectroscopy was employed to measure chemically active species, such as dioxygen fluoride (O2F) and ozone (O3), inside and outside the APPJ. At room temperature operation, O2F was found to be a significant long-lived radical, which lasted up to 10 ms in the effluent with a density of about 1015 cm-3. The concentration of O3 does not fall off and keeps its density constant up to 10 ms, which indicates the absence of atomic fluorine (F) outside the APPJ. Measurements were in good agreement with a gas-phase post-plasma simulation. In summary, atomic fluorine produced inside the APPJ recombines with O2 molecules, producing O2F molecules, which can live long enough to etch metal surfaces.
© 2016 by Walter de Gruyter Berlin/Boston
Articles in the same Issue
- Preface
- The Oxidation of Carbon Soot in a Non-thermal, Atmospheric Pressure Plasma: Experiment and Modelling
- Study in Space and Time of the Gas Temperature Variations in Dielectric Barrier Discharge Reactors
- Removal of Phenol from Water: A Comparison of Energization Methods
- Non Thermal Plasma NOx Remediation: From Binary Gas Mixture to Lean-Burn Gasoline and Diesel Engine Exhaust
- Influences of Reactor Geometry on Ozone Production with Dielectric Barrier Discharges: Experimental and Simulation Studies
- Ozone Production by Primary and Secondary Streamers in Pulsed Positive Corona Discharge
- Hybrid Gas/Liquid Electrical Discharge Reactors with Zeolites for Colored Wastewater Degradation
- CF4/O2/He Reaction Chemistry in an Atmospheric Pressure Plasma Jet
- Enhancement of Propane Flame Stability by Dielectric Barrier Discharges
- Soot Free Non-Thermal Plasma Reforming of Hydro Carbon Gas by Flow Stabilized Corona Discharges
- Decoloration of Organic Dye in Water by Pulsed Discharge Plasma Generated Simultaneously in Gas and Liquid Media
- The Effect of Conductivity on Active Species Products by Electrical Discharge with Air Bubbles in Water
- The Role of Surface Reactions in De-NOx Processes in Corona Discharge-Catalyst (or Zeolite) Hybrid Systems
- Characteristics of DC Corona Streamers Induced by UV Laser Irradiation in Non-Thermal Plasma
- Decomposition of Gas-Phase Benzene Using Plasma – Driven Catalyst Reactor: Complete Oxidation of Adsorbed Benzene Using Oxygen Plasma
- A Solution to the Problem of Large Energy Consumption of the De-NOx Process by Non-Thermal Plasma
- DC and Pulsed Surface Corona Discharge along a Dielectric Flat Plate in Air: Electrical Properties and Discharge-Induced Ionic Wind
- Dependence of NOx Removal by Pulsed Streamer Discharge on the Input Energy Density to Nitric Oxide Ratio
- After-Treatment of NOx Using Combination of Non-Thermal Plasma and Oxidative Catalyst Prepared by Novel Impregnation
Articles in the same Issue
- Preface
- The Oxidation of Carbon Soot in a Non-thermal, Atmospheric Pressure Plasma: Experiment and Modelling
- Study in Space and Time of the Gas Temperature Variations in Dielectric Barrier Discharge Reactors
- Removal of Phenol from Water: A Comparison of Energization Methods
- Non Thermal Plasma NOx Remediation: From Binary Gas Mixture to Lean-Burn Gasoline and Diesel Engine Exhaust
- Influences of Reactor Geometry on Ozone Production with Dielectric Barrier Discharges: Experimental and Simulation Studies
- Ozone Production by Primary and Secondary Streamers in Pulsed Positive Corona Discharge
- Hybrid Gas/Liquid Electrical Discharge Reactors with Zeolites for Colored Wastewater Degradation
- CF4/O2/He Reaction Chemistry in an Atmospheric Pressure Plasma Jet
- Enhancement of Propane Flame Stability by Dielectric Barrier Discharges
- Soot Free Non-Thermal Plasma Reforming of Hydro Carbon Gas by Flow Stabilized Corona Discharges
- Decoloration of Organic Dye in Water by Pulsed Discharge Plasma Generated Simultaneously in Gas and Liquid Media
- The Effect of Conductivity on Active Species Products by Electrical Discharge with Air Bubbles in Water
- The Role of Surface Reactions in De-NOx Processes in Corona Discharge-Catalyst (or Zeolite) Hybrid Systems
- Characteristics of DC Corona Streamers Induced by UV Laser Irradiation in Non-Thermal Plasma
- Decomposition of Gas-Phase Benzene Using Plasma – Driven Catalyst Reactor: Complete Oxidation of Adsorbed Benzene Using Oxygen Plasma
- A Solution to the Problem of Large Energy Consumption of the De-NOx Process by Non-Thermal Plasma
- DC and Pulsed Surface Corona Discharge along a Dielectric Flat Plate in Air: Electrical Properties and Discharge-Induced Ionic Wind
- Dependence of NOx Removal by Pulsed Streamer Discharge on the Input Energy Density to Nitric Oxide Ratio
- After-Treatment of NOx Using Combination of Non-Thermal Plasma and Oxidative Catalyst Prepared by Novel Impregnation
