Dangsunthonchai Mongkol, Visuwan Poranat, Komintarachat Cholada, Theinnoi Kampanart, Chuepeng Sathaporn
Department of Mechanical Engineering, Faculty of Engineering, Kasetsart University, 50 Ngamwongwan Road, Bangkok 10900, Thailand.
ATAE Research Unit, Department of Mechanical Engineering, Faculty of Engineering at Sriracha, Kasetsart University, 199 Sukhumvit Road, Chonburi 20230, Thailand.
ACS Omega. 2022 Jan 18;7(4):3384-3394. doi: 10.1021/acsomega.1c05627. eCollection 2022 Feb 1.
An experimental study of the particulate matter (PM)-related emissions from the combustion of waste cooking oil (WCO)-based biodiesel-blended (0%, 30%, and 100% v/v) fuels in a four-cylinder diesel particulate filter (DPF)-equipped engine was carried out. A laboratory-scale DPF under the controlled conditions was installed into an aftertreatment system, and the PM mass and number characteristics were investigated. The combustion analysis based on in-cylinder pressure shows that the added WCO shortened the ignition delay, advanced the combustion ignition, and increased peak pressure values compared to conventional diesel fuel. The WCO increase in specific fuel consumption led to a slight reduction in brake thermal efficiency. The WCO-fueled engine showed reduced PM and total unburned hydrocarbon but increased nitric oxide emission. The nucleation and accumulation were characterized for nanoparticle number and size distribution. The particle number (PN) concentration in total was declined to smaller values when fueling with WCO. In the thermogravimetric analysis, the PM of WCO oxidized to a greater level than that of diesel fuel, which was observed by the weight loss rates during the specified heating program. WCO lowered the elemental carbon (EC) part of PM than diesel fuel. When equipping an exhaust system with DPF, the EC and the total PN drastically reduced while the particle size slightly increased. The use of DPF with the WCO biodiesel mitigated both EC and organic carbon components of the captured particles of the released PM.
对配备四缸柴油颗粒过滤器（DPF）的发动机中燃烧基于废食用油（WCO）的生物柴油混合燃料（0%、30%和100%体积比）时与颗粒物（PM）相关的排放进行了实验研究。在受控条件下，将实验室规模的DPF安装到后处理系统中，并研究了PM的质量和数量特性。基于缸内压力的燃烧分析表明，与传统柴油燃料相比，添加WCO缩短了点火延迟，提前了燃烧着火，并提高了峰值压力值。WCO导致的特定燃料消耗增加使制动热效率略有降低。以WCO为燃料的发动机PM和总未燃烧碳氢化合物减少，但一氧化氮排放增加。对纳米颗粒数量和尺寸分布的成核和积聚进行了表征。使用WCO作为燃料时，总颗粒数（PN）浓度降至较小值。在热重分析中，通过指定加热程序期间的失重率观察到，WCO的PM氧化程度高于柴油燃料。与柴油燃料相比，WCO降低了PM中元素碳（EC）的比例。当排气系统配备DPF时，EC和总PN大幅减少，而颗粒尺寸略有增加。使用DPF与WCO生物柴油可减轻释放的PM中捕获颗粒的EC和有机碳成分。
