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根据低温等离子体的产生原理和柴油机有害排放物的生成特点,设计了结构和功能具有实用性的等离子体反应器;通过静态试验研究了介质阻挡放电的放电特性及其影响因素,探讨了低温等离子体的化学反应机理;通过柴油机台架试验对低温等离子体处理柴油机排气中的碳烟和NOx进行了研究.结果表明,选用介电常数较大、厚度较薄的介质材料以及合适的放电间隙容易产生强烈的放电,低温等离子体对碳烟具有较高的去除率,亦可有效减少NO,而NOx总量基本不变.排气在等离子体反应区内的有效滞留时间是影响转化效率的重要因素.
Based on the principle of low-temperature plasma generation and the formation of harmful emissions from diesel engine, a plasma reactor with practical structure and function was designed. The static discharge test was used to study the discharge characteristics and influencing factors of dielectric barrier discharge. The effects of low-temperature plasma The chemical reaction mechanism of diesel engine was studied.The soot and NOx in the exhaust of diesel engine treated by low temperature plasma were studied by diesel engine bench test.The results show that the dielectric material with larger dielectric constant and thinner thickness and suitable discharge gap Easy to produce a strong discharge, low-temperature plasma has a high removal rate of soot, but also effectively reduce NO, while the total amount of NOx is essentially constant exhaust effective residence time in the plasma reaction zone is affecting the conversion efficiency Key factor.