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用等离子体辅助的烟灰氧化:臭氧和NO2作为有效的柴油颗粒过器再生的双氧化剂

Teerapong Iamcheerangkoon^1,2, Tanapat Prodkornburee^1,2, Nuwong Chollacoop³

¹College of Industrial Technology, King Mongkut's University of Technology North Bangkok, 1518 Pracharat 1 Road, Wongsawang, Bangsue, Bangkok 10800, Thailand.

|November 24, 2025

概括

这项研究表明,非热等离子体可以利用臭氧和二氧化再生柴油颗粒过器. 这种双氧化剂方法显著降低了过器压力下降,并提高了低温下烟尘氧化效率.

科学领域:

工程工程师工程师工程师
环境科学环境科学
化学化学化学

背景情况:

柴油颗粒过器 (DPF) 对于减少柴油发动机的排放至关重要.
传统的DFF再生方法可能耗费大量能源,可能需要对发动机进行修改.
开发高效的低温再生策略对于更清洁的柴油技术至关重要.

研究的目的:

调查线性介电屏障放电非热等离子体 (DBD-NTP) 系统用于DPF再生的有效性.
评估血衍生氧化剂,特别是臭氧 (O3) 和二氧化 (NO2) 在烟尘氧化中的作用.
评估O3和NO2对DPF压力下降和烟尘纳米结构的协同效应.

主要方法:

使用直线DBD-NTP反应堆在柴油发动机运行时从空气输入中产生O3和NO2 (B7燃料,6巴IMEP).
进行了DPF再生实验,比较单氧化剂 (O3) 与双氧化剂 (O3 + NO2) 策略.
采用电气低压扫描移动粒子测量仪 (EEPS),高分辨率传输电子显微镜 (HRTEM) 和热重力测量分析 (TGA) 来分析颗粒物和烟尘属性.

主要成果:

双重O3 + NO2氧化剂策略实现了DPF压力下降的74%降低,明显高于单独使用O3的46%降低.
EEPS证实,通过双氧化剂战略,核化模式和积累模式的颗粒物减少了.
HRTEM 显示了烟尘纳米结构转化为无序的石墨层,TGA 显示了烟尘氧化激活能量的减少 (从 101.6 到 83.9 kJ mol-1).

结论:

在线DBD-NTP有效地产生强有力的氧化剂 (O3和NO2),用于低温DPF再生.
NO2与O3具有协同作用,通过降低激活能量和增加反应性来增强烟尘氧化.
这种双氧化剂DBD-NTP方法提供了一个有希望的,无需修改发动机的方法,在现实的排气条件下提高DPF再生效率.

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