Two-Stage Plasma-Catalysis for Diesel NOx Emission Control
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Abstract
Plasma discharges in diesel simulated exhaust gas oxidize NO primarily to NO2, while forming aldehydes and other partial-oxidation products from hydrocarbons. Appropriate catalysts can react NOx and aldehydes in the presence of oxygen, producing nitrogen. Suitable catalysts include sodium and barium forms of zeolite-Y, and for higher temperatures, high surface area γ-alumina. Combinations of catalysts can be more effective that the individual ones, especially considering temperature transients which occur during vehicle operation. An oxidation catalyst is required following the NOx catalysts, to remove remaining hydrocarbon, aldehydes, and HCN species. A cascaded system consisting of multiple plasma-catalyst stages, can achieve higher NOx conversion and/or more efficient electrical power utilization than a single plasma-catalyst system. Best effort laboratory evaluations on simulated exhaust have achieved 90% NOx conversion. Vehicle tests have yet to show such promising results.
© 2016 by Walter de Gruyter Berlin/Boston
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- The Scale-up and Economic Evaluation of Non-Thermal Plasma Technology for a Coal Fired Power Plant Exhaust Gas Emission Control
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- NOx Removal from Diesel Engine Exhaust by Ozone Injection Method
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- Two-Stage Plasma-Catalysis for Diesel NOx Emission Control
- Studies on Decolorization of Textile Dyeing Rinse Wastewaters in Solar Photocatalytic Reactors
- Comparison of EEIM and Cumulative Efficiency Methods for the Evaluation and Optimization of Advanced Oxidation Processes for DOC Removal from Water
- Studies on Ozone Mass Transfer with High Dissolved Concentration
Articles in the same Issue
- The Scale-up and Economic Evaluation of Non-Thermal Plasma Technology for a Coal Fired Power Plant Exhaust Gas Emission Control
- Effect of Ammonia Addition on Photo-Resist Removal Characteristics by Ozone/Water Vapor Treatments
- NOx Removal from Diesel Engine Exhaust by Ozone Injection Method
- Gas-Phase Photocatalytic Oxidation of Styrene in a Simple Tubular TiO2 Reactor
- Two-Stage Plasma-Catalysis for Diesel NOx Emission Control
- Studies on Decolorization of Textile Dyeing Rinse Wastewaters in Solar Photocatalytic Reactors
- Comparison of EEIM and Cumulative Efficiency Methods for the Evaluation and Optimization of Advanced Oxidation Processes for DOC Removal from Water
- Studies on Ozone Mass Transfer with High Dissolved Concentration
