Combustion, gaseous emissions and PM characteristics of Di-Methyl Carbonate (DMC)-gasoline blend on gasoline Direct Injection (GDI) engine
Combustion, gaseous emissions and PM characteristics of Di-Methyl Carbonate (DMC)-gasoline blend on gasoline Direct Injection (GDI) engine
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DOI：
10.1016/j.fuel.2019.116742
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发表时间：
2020-03-01
期刊：
影响因子：
7.4
通讯作者：
Bogarra, M.
中科院分区：
文献类型：
--
作者：
Chan, J. H.;Tsolakis, A.;Bogarra, M.
与相应的端口燃油喷射发动机相比，汽油直喷 (GDI) 发动机的颗粒排放水平更高，促使采取立法措施来限制其数量以及颗粒物 (PM) 质量。本研究介绍了一种潜在合适的含氧成分碳酸二甲酯 (DMC) 作为汽油燃料的补充物对污染物排放的影响。通过热重分析 (TGA) 对废气 PM 进行表征，以了解其氧化行为和成分，通过透射电子显微镜 (TEM) 研究其团聚体的形态特征，并通过拉曼光谱 (RAMAN) 分析颗粒纳米结构。对 8% v/v DMC-汽油混合燃料 (D8) 的发动机进行研究，显示出与汽油相似的燃烧特性和燃油经济性。 DMC 混合燃料的燃烧使未燃烧碳氢化合物 (THC) 总量减少了约 30%，PM 排放量减少了 60%。 D8 形成的颗粒的表征表明形态和纳米结构发生了变化，包括初级颗粒尺寸减小 10%，从而导致颗粒氧化反应性增强。与汽油燃烧排放的颗粒相比，D8 燃烧排放的颗粒的氧化开始时间早 15 摄氏度。
The higher level of particle emissions of Gasoline Direct Injection (GDI) engines with respect to their counterpart port fuel injection engines motivated the introduction of legislative measures to limit their number in addition to the particulate matter (PM) mass. This study presents the impact on pollutant emissions of a potentially suitable oxygenated component, Di-Methyl Carbonate (DMC), as a supplement to gasoline fuel. Exhaust PM was characterised with Thermogravimetric Analysis (TGA) to understand its oxidation behaviour and composition, Transmission Electron Microscopy (TEM) to study the morphological characteristics of its agglomerate and Raman Spectroscopy (RAMAN) to analyse the particle nano-structure. Engine studied of an 8% v/v DMC-gasoline fuel blend (D8) show similar combustion characteristics and fuel economy compared to gasoline. The combustion of DMC fuel blend reduced total unburnt hydrocarbon (THC) by approximately 30% and the number of PM emissions by 60%. Characterisation of particles formed by D8 demonstrated morphological and nanostructural alterations including a 10% reduction in primary particle size, leading to greater particles oxidation reactivity. The oxidation of particles emitted from the combustion of D8 started 15 degrees C earlier when compared to particles emitted from the gasoline combustion.