Electrical discharge-based nonthermal plasma is being used for the past three decades at laboratory level to treat the oxides of nitrogen (NO _X ) present in diesel exhaust. To improve the NO _X 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% NO _X 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 NO _X 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：赤泥工业废弃物的可行性研究

过去三十年来，实验室一直在使用基于放电的非热等离子体来处理 柴油机尾气中存在的氮氧化物 (NO _X )。为了改善 NO _X减排，市售的昂贵催化剂和吸附剂通常与等离子体结合使用。在本文中，开始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。已经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优势。在约 60 J/L 时，等离子体催化产生 91% 的 NO _X相比之下，血浆去除率为 2%，血浆级联赤泥为 7%。根据等离子体活化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。已经详细讨论了结果，强调了通过放电等离子体活化赤泥来去除NO _X的优点 。