School of Automotive and Transportation Engineering, Hefei University of Technology, Hefei, Anhui 230009, China.
School of Automotive and Transportation Engineering, Hefei University of Technology, Hefei, Anhui 230009, China.
Sci Total Environ. 2021 Sep 20;788:147753. doi: 10.1016/j.scitotenv.2021.147753. Epub 2021 May 14.
Particulate emissions from the combustion of diesel have always been the main concern, especially in recent years, with continuously stringent particulate emission regulation for diesel engines. To alleviate the problem, biodiesel has been received great attention because of its being environment-friendly, widely available and renewable. The application of biodiesel in diesel engines changes the combustion process, thus varies physicochemical property of the particulate matter (PM) formed, which in turn influences the oxidative reactivity of soot particles. In view of this, it is particularly important to analyze soot particles from the diesel engine fueled with biodiesels. This review focus on the effects of biodiesels on the physicochemical properties of soot particles, such as surface morphology, nanostructure, active surface area, element composition, elemental and organic carbon contents, surface functional groups, sp and sp hybridizations, etc. The impact of engine operating conditions (i.e. engine load, engine speed, fuel injection timing, fuel injection pressure, exhaust gas recirculation, etc.) on characteristics of soot particles from diesel engines powered by biodiesel is also discussed. Whereafter, the relationships between soot physicochemical characteristics and soot oxidative reactivity are reviewed. Finally, the main conclusions are outlined as well as the proposed research work in the future.
柴油机燃烧产生的颗粒物一直是主要关注点，尤其是近年来，柴油机的颗粒物排放法规不断严格。为了解决这个问题，生物柴油因其环保、广泛可用和可再生而受到极大关注。生物柴油在柴油机中的应用改变了燃烧过程，从而改变了形成的颗粒物（PM）的物理化学性质，进而影响了炭黑颗粒的氧化反应性。鉴于此，分析柴油机中生物柴油燃烧生成的炭黑颗粒尤为重要。本文综述了生物柴油对炭黑颗粒物理化学性质的影响，如表面形貌、纳米结构、比表面积、元素组成、元素和有机碳含量、表面官能团、sp 和 sp 杂化等。还讨论了发动机运行条件（如发动机负荷、发动机转速、燃油喷射定时、燃油喷射压力、废气再循环等）对生物柴油驱动的柴油机生成的炭黑颗粒特性的影响。随后，综述了炭黑物理化学特性与炭黑氧化反应性之间的关系。最后，概述了主要结论以及未来拟开展的研究工作。
