The study investigated NO reduction by N radicals produced by barrier discharge in nitrogen and the possible effect of TiO2 catalyst on this reaction. The experiments for NO reduction were carried out at temperatures ranging from room temperature to 140 °C and at NO concentrations ranging from 200 to 800 ppm. The experimental results were described by a model which was based on six main reactions for the calculation of the NO and NO2 concentrations. The analysis of model suggested two simple methods for the estimation of nitrogen radical production efficiency which in present study was 2 ppm/(J/L). The model also confirmed that N radicals are used very efficiently in the reduction of NO and this process can’t be improved by the catalyst. Nonetheless, experiments showed that the presence of TiO2 catalyst improved the removal of NO. The experimental results can be explained by surface processes taking place with NO2 with the help of other plasma produced nitrogen species.

中文翻译：

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TiO2催化剂对氮中阻挡放电NO还原的影响

该研究调查了氮中阻挡放电产生的 N 自由基对 NO 的还原，以及 TiO2 催化剂对该反应的可能影响。NO 还原实验在室温至 140 °C 的温度和 200 至 800 ppm 的 NO 浓度下进行。实验结果由基于六个主要反应的模型描述，用于计算 NO 和 NO2 浓度。模型分析提出了两种估算氮自由基产生效率的简单方法，在本研究中为 2 ppm/(J/L)。该模型还证实，N 自由基在还原 NO 时非常有效地使用，并且该过程无法通过催化剂进行改进。尽管如此，实验表明 TiO2 催化剂的存在改善了 NO 的去除。