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<p>With the increased usage of fossil fuels, particularly diesel that contributes to almost 40% of fuel consumption in developing countries like India, it becomes crucial to investigate the gaseous pollutants like total hydrocarbon (THC) and oxides of nitrogen (NO<sub>X</sub>) removal techniques from its exhaust. Recently, the method of using non-thermal plasma for treating diesel exhaust emerges as promising solution for removal of these pollutants. In this study a novel method of catalyzing solid industrial wastes under plasma discharges is explored with the aim of achieving maximum pollutant removal efficiency at low specific energy (J/L). Two industrial wastes namely iron tailings and foundry sand were tested for their catalytic performance when exposed to plasma shower. Cascaded plasma energization involving a maximum of three reactors was newly introduced in this work which enhances the energy density from 37&#xa0;J/L to 442&#xa0;J/L yielding a THC removal efficiency of 90% with iron tailingss filling all the reactors. In the second part of the study, the plasma catalysis of diesel exhaust was carried out first with industrial wastes (iron tailings) and then with commercial catalysts namely CuO-ZnO-Al<sub>2</sub>O<sub>3</sub> and Fe<sub>2</sub>O<sub>3</sub>-Cr2O<sub>3</sub>. At about 300&#xa0;J/L, the THC removal with industry waste was 10% higher than the commercial catalysts, thus, asserting the fact that cheaply available industrial waste can be a better option. The analysis shows the synergy between metal oxide component present in the industrial waste and the gaseous pollutant that resulted in significant pollutant removal efficiency.</p>

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Enhanced Abatement of Hydrocarbons Using Iron Tailings/Foundry Sand Activated Through Plasma Catalysis of Diesel Exhaust

  • 期刊论文

  • 发表日期：

    2025年7月22日

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  • Sakshi Vijay,
  • B. S. Rajanikanth

摘要

With the increased usage of fossil fuels, particularly diesel that contributes to almost 40% of fuel consumption in developing countries like India, it becomes crucial to investigate the gaseous pollutants like total hydrocarbon (THC) and oxides of nitrogen (NOX) removal techniques from its exhaust. Recently, the method of using non-thermal plasma for treating diesel exhaust emerges as promising solution for removal of these pollutants. In this study a novel method of catalyzing solid industrial wastes under plasma discharges is explored with the aim of achieving maximum pollutant removal efficiency at low specific energy (J/L). Two industrial wastes namely iron tailings and foundry sand were tested for their catalytic performance when exposed to plasma shower. Cascaded plasma energization involving a maximum of three reactors was newly introduced in this work which enhances the energy density from 37 J/L to 442 J/L yielding a THC removal efficiency of 90% with iron tailingss filling all the reactors. In the second part of the study, the plasma catalysis of diesel exhaust was carried out first with industrial wastes (iron tailings) and then with commercial catalysts namely CuO-ZnO-Al2O3 and Fe2O3-Cr2O3. At about 300 J/L, the THC removal with industry waste was 10% higher than the commercial catalysts, thus, asserting the fact that cheaply available industrial waste can be a better option. The analysis shows the synergy between metal oxide component present in the industrial waste and the gaseous pollutant that resulted in significant pollutant removal efficiency.