Abstract The accurate detection of NO and SO2 emitted from fossil fuel power plants is critical for realizing the real-time control of clean combustion systems and environmental protection. An array of two CNT-based ionization sensors with different electrode separations is used to detect NO and SO2 in flue gas. The responses of each sensor show a monotone decreasing response, and are obviously separated but almost parallel. The decreasing response is attributed to strong consumption of N2(A3∑u+) and N2(a'1∑u+) in collision with SO2 or NO. And the separated and parallel responses in gas mixture indicates a good selectivity and the ability to simultaneously detect SO2 and NO concentrations with no other means. In addition, the array also have excellent long-term stability due to its non-self-sustaining discharge, which reducing the damage of CNTs caused by electrical breakdown. And the sensor has a fast response and recovery times of 8 s and 7 s, respectively.

中文翻译：

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用于选择性和稳定检测 SO2 和 NO 的基于 CNT 的传感器阵列

摘要 化石燃料发电厂排放的NO和SO2的准确检测对于实现清洁燃烧系统的实时控制和环境保护至关重要。具有不同电极间距的两个基于 CNT 的电离传感器阵列用于检测烟气中的 NO 和 SO2。每个传感器的响应呈现单调递减响应，明显分离但几乎平行。下降的响应归因于与 SO2 或 NO 碰撞时强烈消耗 N2(A3∑u+) 和 N2(a'1∑u+)。气体混合物中的分离和平行响应表明具有良好的选择性和同时检测 SO2 和 NO 浓度的能力，而没有其他方法。此外，该阵列由于其非自持放电，还具有出色的长期稳定性，从而减少由电击穿引起的碳纳米管的损坏。该传感器的快速响应和恢复时间分别为 8 秒和 7 秒。