气候变化领域集成服务门户(CCPortal): Size-resolved physico-chemical characterization of diesel exhaust particles and efficiency of exhaust aftertreatment

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DOI	10.1016/j.atmosenv.2019.117021
	Size-resolved physico-chemical characterization of diesel exhaust particles and efficiency of exhaust aftertreatment
	Zeraati-Rezaei S.; Alam M.S.; Xu H.; Beddows D.C.; Harrison R.M.
发表日期	2020
ISSN	13522310
卷号	222
英文摘要	Knowledge of physico-chemical characteristics of particle emissions from combustion engines is essential for various modelling purposes and environmental analysis. It is of particular interest to obtain emission factors of intermediate-volatility organic compounds (IVOC) and semi-volatile organic compounds (SVOC) which have not been comprehensively reported in the literature due to the limitations of characterisation methods. In the current study, a multi-stage Nano impactor and the two-dimensional gas chromatography (GC × GC) mass spectrometry (MS) technique were used to comprehensively characterise size fractionated particle phase emissions from a light-duty diesel engine based on the particle size, compound groups and carbon number. The number size distributions of particles between 1.2–1000 nm were also investigated. Exhaust gas samples were taken before a diesel oxidation catalyst (DOC), after the DOC and after the DOC combined with a catalysed diesel particulate filter (DPF). In samples taken before the DOC (engine-out), the total particulate IVOC+SVOC (I+SVOC) emission factor was approximately 105 milligrams per kilogram of fuel consumed (which was ~49% of the total particle mass) and the peak concentration of different classes of I+SVOC was found in the particle size bins close to 100 nm where most of the total particle mass was found. Alkanes, with maximum abundance at C24, were the most dominant class of I+SVOC in samples taken before and after the aftertreatment devices. Total particulate I+SVOC emissions were removed with ~75% efficiency using the DOC and by ~92% using the DOC+DPF. Alkanes, cycloalkanes, bicyclics and monoaromatics were all removed by >90% using the DOC+DPF; however, oxygenates were removed by only ~76% presumably due to the oxidation of different species within the aftertreatment system and reappearance as oxygenates. A high concentration of particles was measured in the sub-2.5 nm range. These particles were efficiently removed by the DOC+DPF due to both the loss of I+SVOC and physical filtration. © 2019 Elsevier Ltd
英文关键词	Diesel engine; DOC; DPF; Particle size magnifier; Particulate matter; SVOC
学科领域	Diesel engines; Efficiency; Gas chromatography; Gas emissions; Mass spectrometry; Paraffins; Particle size; Particles (particulate matter); Particulate emissions; Volatile organic compounds; Diesel particulate filters; Light-duty diesel engines; Particulate Matter; Physico-chemical characterization; Physicochemical characteristics; Semivolatile organic compounds; SVOC; Two dimensional gas chromatography; Particle size analysis; alkane; aromatic compound; cycloalkane; volatile organic compound; chemical compound; concentration (composition); efficiency measurement; equipment; exhaust emission; instrumentation; oxidation; physicochemical property; pollutant removal; airborne particle; catalyst; exhaust gas; filtration; mass fragmentography; oxidation; particle size; particulate matter; physical chemistry; priority journal
语种	英语
scopus关键词	Diesel engines; Efficiency; Gas chromatography; Gas emissions; Mass spectrometry; Paraffins; Particle size; Particles (particulate matter); Particulate emissions; Volatile organic compounds; Diesel particulate filters; Light-duty diesel engines; Particulate Matter; Physico-chemical characterization; Physicochemical characteristics; Semivolatile organic compounds; SVOC; Two dimensional gas chromatography; Particle size analysis; alkane; aromatic compound; cycloalkane; volatile organic compound; chemical compound; concentration (composition); efficiency measurement; equipment; exhaust emission; instrumentation; oxidation; physicochemical property; pollutant removal; airborne particle; catalyst; exhaust gas; filtration; mass fragmentography; oxidation; particle size; particulate matter; physical chemistry; priority journal
来源期刊	Atmospheric Environment
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/120840
作者单位	Department of Mechanical Engineering, School of Engineering, University of Birmingham, Edgbaston, Birmingham, B15 2TT, United Kingdom; School of Geography, Earth & Environmental Sciences, University of Birmingham, Edgbaston, Birmingham, B15 2TT, United Kingdom; National Centre for Atmospheric Science, School of Geography, Earth and Environmental Sciences, University of Birmingham, Edgbaston, Birmingham, B15 2TT, United Kingdom
推荐引用方式 GB/T 7714	Zeraati-Rezaei S.,Alam M.S.,Xu H.,et al. Size-resolved physico-chemical characterization of diesel exhaust particles and efficiency of exhaust aftertreatment[J],2020,222.
APA	Zeraati-Rezaei S.,Alam M.S.,Xu H.,Beddows D.C.,&Harrison R.M..(2020).Size-resolved physico-chemical characterization of diesel exhaust particles and efficiency of exhaust aftertreatment.Atmospheric Environment,222.
MLA	Zeraati-Rezaei S.,et al."Size-resolved physico-chemical characterization of diesel exhaust particles and efficiency of exhaust aftertreatment".Atmospheric Environment 222(2020).