DOC对柴油机燃用生物柴油颗粒物微观形貌及SOF组分的影响

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Abstract In order to analyze the effect of Diesel Oxidation Catalyst (DOC) on microstructure and Soluble Organic Fractions (SOF) components of emission particulates emitted from diesel-biodiesel dual fuel (B0, B20), an experimental study was carried out on a diesel engine. Particulate matters before and after the DOC were collected and their physicochemical properties were characterized with using Transmission Electron Microscopy (TEM) and Gas Chromatograph-Mass Spectrometer (GC-MS). Results show that, increasing biodiesel percentage can minimize the size of basic carbon particles. Moreover, the surface of those tiny carbon particles appears more complicated, and consequently, the fractal dimension of particles were increased when the engine was fueled with B20. With a static analysis of the detailed SOF components from GC-MS analysis, it is revealed that esters and acids account for a larger proportion, while alkanes, PAHs and phenols account for very small proportion. A decline in the mass fraction of C26~C35 was also revealed. For the diesel engine with DOC, the surface of particles is more perceivable, and the fractal dimension of particles for B0 and B20 were reduced by 10.1% and 15.5% respectively. In terms of the SOF content, PAHs and phenols account for a larger proportion while alkanes, esters and acids account for a smaller proportion and also, the results show a decline in the mass fraction of C15~C25. The B0particle emission of C26~C35 mass fraction of SOF decreased 41.4% while B20 increased 865.8%.

Key words： diesel oxidation catalyst biodiesel particulate matter microstructure soluble organic fractions

Received: 24 June 2017

PACS:	X513
	TK421

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	Articles by authors
	DU Jia-yi
	CHANG Zhen-zhen
	ZHOU Ren-shuang
	ZHANG Deng-pan
	YUAN Yin-nan

Cite this article:

DU Jia-yi,CHANG Zhen-zhen,ZHOU Ren-shuang等. Influence of DOC on the microstructure and SOF components of particulate matters from a diesel engine fueled with biodiesel-diesel blend[J]. CHINA ENVIRONMENTAL SCIENCECE, 2018, 38(1): 83-90.

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http://manu36.magtech.com.cn/Jweb_zghjkx/EN/ OR http://manu36.magtech.com.cn/Jweb_zghjkx/EN/Y2018/V38/I1/83

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