The Role of Surface Reactions in De-NOx Processes in Corona Discharge-Catalyst (or Zeolite) Hybrid Systems
-
M. Dors
,
J. Mizeraczyk
Abstract
The objective of this work was to explain the efficient NOx removal from simulated flue gas observed in the hybrid corona discharge-catalyst hybrid systems with either V2O5/TiO2 catalyst or zeolite, both at room temperature. The simulated flue gas was a mixture of N2 (80%):O2 (5%):CO2 (15%):NO (200 ppm). After analysing the results of several experiments on NOx removal in the corona discharge-catalyst (or zeolite) systems, two different mechanisms of NOx conversion in the hybrid systems are proposed. In the positive corona discharge-catalyst system, NOx molecules are removed due to the activation of the catalyst surface by the corona discharge (TiO2 + ε (≥ 3.2 eV) → hole+ + e), which is followed by: (a) the catalyst surface driven formation of NH2 radicals (which reduce NOx into N2 in gas phase) and H+ (or NH4 +) ions, (b) the oxidation of NOx to surface-trapped NO3-. The NO3- ions trapped on the catalyst surface are precursors of the formation of NH4NO3 aerosols depositing on the catalyst surface. In the corona discharge-zeolite system, the conversion of NOx into NH4NO3, N2 and H2O occurs due to the reactions involving zeolite-fixed NH4+ ions.
© 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
