公交车燃用生物柴油的颗粒物水溶性离子排放

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Abstract The water soluble ions (WSI) emission characteristic in particles from a China-V bus fueled with biodiesel blends at proportions of 5%, 10% and 20% (v/v) made from waste cooking oil was investigated based on a heavy chassis dynamometer under Chinese city bus cycle. The results show that the particles from this bus presented faintly acid, the WSI mass accounted for about 3% of the total particles, which main distributed in particles with size from 0.5 to 18μm. Among the WSI, the anions weighted for 72%~79%. The biodiesel had no effect on the WSI specials, but the WSI anions emissions and acidity of the particles increased with the biodiesel proportion in the blends, and the peak of WSI concentration shifted to smaller size. The Cl^-、Ca²⁺、Na⁺ might originate from CaCl₂ and NaCl. Controlling the sulfur content, Na⁺, Ca²⁺ as well as Cl^- content in the biodiesel, optimizing the cylinder combustion to reduce NO_x emission were of significance to reduce the WSI emissions in the particles from diesel bus.

Key words： waste cooking oil-based biodiesel China V bus particulate matter water soluble ions (WSI) acid-base property

Received: 17 July 2020

PACS:	X513
	X705

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	Articles by authors
	HU Zhi-yuan
	WANG Zhuo
	TAN Pi-qiang
	LOU Di-ming

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HU Zhi-yuan,WANG Zhuo,TAN Pi-qiang等. Emission characteristics of water soluble ions in particles from a diesel bus fueled with biodiesel blends[J]. CHINA ENVIRONMENTAL SCIENCECE, 2021, 41(2): 606-613.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2021/V41/I2/606

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