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<p>The elimination of nitrogen oxides (NO<sub>X</sub>) from diesel engine emissions is a significant environmental issue, necessitating effective and energy-efficient treatment methods. This study examines the impact of electrode design on NO<sub>X</sub> removal efficiency, with an emphasis on optimizing electrode configurations to improve performance at low operating voltages. Different electrode geometries were examined through COMSOL Multiphysics simulations, and experimental validation was performed utilizing actual diesel engine exhaust at flow rates of 5, 10, and 15 Lpm. The research conducts a comparative analysis of plain rod electrodes and spiked electrodes to evaluate their efficacy in improving electric field intensity and plasma formation, which are critical parameters in the conversion of NO<sub>X</sub>. The findings demonstrate that spiked electrodes, specifically those featuring a 6&#xa0;mm diameter and a 5&#xa0;mm spike, substantially reduce energy consumption while enhancing NO<sub>2</sub> conversion efficiency. The enhanced field concentration around the spikes facilitates improved ionization and reaction kinetics, resulting in more effective NO<sub>X</sub> decomposition. The results indicate that the geometry of the electrode is essential for enhancing the efficiency of plasma-based NO<sub>X</sub> removal, with spiked electrodes providing a more sustainable and economically viable option compared to traditional designs. This study enhances plasma-assisted emission control technologies by offering insights into the optimization of electrodes for practical applications in diesel exhaust treatment.</p>

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Efficient Electrode Configuration for NOX Treatment from Diesel Engine Exhaust at Low Applied Voltage

  • 期刊论文

  • 发表日期：

    2025年8月16日

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  • Sarbesh Bhattacherjee,
  • Sankarsan Mohapatro

摘要

The elimination of nitrogen oxides (NOX) from diesel engine emissions is a significant environmental issue, necessitating effective and energy-efficient treatment methods. This study examines the impact of electrode design on NOX removal efficiency, with an emphasis on optimizing electrode configurations to improve performance at low operating voltages. Different electrode geometries were examined through COMSOL Multiphysics simulations, and experimental validation was performed utilizing actual diesel engine exhaust at flow rates of 5, 10, and 15 Lpm. The research conducts a comparative analysis of plain rod electrodes and spiked electrodes to evaluate their efficacy in improving electric field intensity and plasma formation, which are critical parameters in the conversion of NOX. The findings demonstrate that spiked electrodes, specifically those featuring a 6 mm diameter and a 5 mm spike, substantially reduce energy consumption while enhancing NO2 conversion efficiency. The enhanced field concentration around the spikes facilitates improved ionization and reaction kinetics, resulting in more effective NOX decomposition. The results indicate that the geometry of the electrode is essential for enhancing the efficiency of plasma-based NOX removal, with spiked electrodes providing a more sustainable and economically viable option compared to traditional designs. This study enhances plasma-assisted emission control technologies by offering insights into the optimization of electrodes for practical applications in diesel exhaust treatment.