Electrical discharge-based nonthermal plasma is being used for the past three decades at laboratory level to treat the oxides of nitrogen (NOX) present in diesel exhaust. To improve the NOX abatement, commercially available expensive catalysts and adsorbents are usually used in combination with plasma. In this article, a new line of experiments was initiated to explore plasma activation of the red mud, a cheap and abundant waste from aluminum industry. The dominance of plasma catalysis associated with plasma activation of red mud at room temperature has been discussed. At about 60 J/L, the plasma catalysis gave 91% NOX removal, when compared to 2% with plasma and 7% with plasma-cascaded red mud. The possible reaction mechanisms were identified in light of plasma activated red mud and the studies were carried out at different engine loads. The results have been discussed at length emphasizing the advantages of NOX removal through activation of red mud by electrical discharge plasma.

中文翻译：

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柴油机尾气等离子催化氮氧化物减排：赤泥工业废物的可行性研究


过去三十年来，基于放电的非热等离子体一直在实验室水平上用于处理柴油机尾气中的氮氧化物 (NOX)。为了提高氮氧化物的减排量，市售的昂贵的催化剂和吸附剂通常与等离子体结合使用。在本文中，发起了一系列新的实验来探索赤泥的等离子体活化，赤泥是一种来自铝工业的廉价而丰富的废物。讨论了与室温下赤泥的等离子体活化相关的等离子体催化的主导作用。在约 60 J/L 的功率下，等离子体催化可实现 91% 的 NOX 去除率，而等离子体催化的 NOX 去除率为 2%，等离子体级联赤泥的 NOX 去除率为 7%。根据等离子体激活赤泥确定了可能的反应机制，并在不同的发动机负载下进行了研究。对结果进行了详细讨论，强调了通过放电等离子体活化赤泥来去除 NOX 的优点。