School of Mechanical Engineering, Yonsei University, 134 Sinchon-Dong, Seodaemun-Gu, Seoul, 03722, Republic of Korea.
Department of Mechanical Engineering, University of Minnesota, Minneapolis, MN, 55455, USA.
Environ Sci Pollut Res Int. 2024 Feb;31(10):15580-15596. doi: 10.1007/s11356-024-32116-4. Epub 2024 Feb 1.
Non-thermal plasma (NTP) efficiently regenerates diesel particulate filters by oxidizing carbon soot (CS) at low temperatures. However, numerical studies on the spatial characteristics of CS oxidation by NTP are scarce. In addition, the influence of background gas heating on the CS-oxidizing performance by NTP remains inadequately understood. This research investigates the impact of gas temperature (323-573 K) on heterogeneous CS oxidation using NTP in a two-dimensional configuration. The results indicate that CS is mainly oxidized by [Formula: see text], [Formula: see text], and [Formula: see text] during NTP treatment. The energy efficiency of CS removal by NTP ranges from 0.1 to 2.6 g kWh for varying gas temperature and applied voltage, consistent with previous research. Higher gas temperatures enhance both CS removal rate and efficiency, whereas higher applied voltages enhance rate at the expense of efficiency. The study also assesses energy conversion efficiency from electrical power input to chemical bonding energy during CS oxidation by NTP, yielding 0.03 to 0.23% efficiency for the considered gas temperature and voltage ranges, with higher temperatures leading to better efficiency.
非热等离子体（NTP）通过在低温下氧化碳 soot（CS）有效地再生柴油颗粒过滤器。然而，关于 NTP 氧化 CS 的空间特性的数值研究很少。此外，背景气体加热对 NTP 氧化 CS 性能的影响仍了解不足。本研究在二维构型中研究了气体温度（323-573 K）对 NTP 中异相 CS 氧化的影响。结果表明，CS 在 NTP 处理过程中主要被[Formula: see text]、[Formula: see text]和[Formula: see text]氧化。NTP 去除 CS 的能量效率范围为 0.1 至 2.6 g kWh，具体取决于气体温度和施加电压，与先前的研究一致。较高的气体温度会同时提高 CS 去除率和效率，而较高的施加电压则会提高速率而降低效率。该研究还评估了 NTP 氧化过程中从电功率输入到化学结合能的能量转换效率，在所考虑的气体温度和电压范围内效率为 0.03 至 0.23%，较高的温度会导致更高的效率。
