Volatile organic compounds from the exhaust of light-duty diesel vehicles

Abstract The exhaust gas constituents of light-duty diesel vehicles (LDDVs), including total hydrocarbon (THC), non-methane hydrocarbon (NMHC), carbon monoxide (CO), nitrogen oxide (NO x ), and volatile organic compounds (VOCs) were measured by a dynamometer study following federal test procedure-75 (FTP-75) and highway fuel economy cycle. The average fuel consumption of these LDDVs was 0.126 L km −1 for FTP-75, with about 10% fuel consumption savings for highway driving. The average emission factors of NMHC, CO and NO x for light-duty vehicles were 0.158/0.132 (90% of THC), 1.395/1.138, and 1.735/1.907 g km −1 for FTP-75/Highway, respectively. Styrene, n-propylbenzene, n-undecane, o-ethyltoluene, 1,2,4-trimethylbenzene, toluene, o-xylene, isopropylbenzene, m,p-xylene, and ethylbenzene were the dominant VOCs of LDDV exhaust, and the emission factors were about 10–60 mg kg −1 . In addition, formaldehyde, acetaldehyde, acetone, butyraldehyde, and m-tolualdehyde were the major carbonyl species from LDDV exhaust, and the emission factors ranged from 1 to 10 mg km −1 . The ozone formation potentials of m,p-xylene, o-ethyltoluene, 1,2,4-trimethylbenzene, o-xylene, n-propylbenzene, styrene, and isoprene were >50 mg-O 3  km −1 . In addition, formaldehyde, acetaldehyde, and butyraldehyde revealed high ozone formation potential of carbonyl species, with values ranging from 10 to 95 mg-O 3  km −1 . Based on the exhaust constituents and ozone formation potential observed, diesel vehicles could be an important air pollution source for urban and industrial areas.

[1]  Allen L Robinson,et al.  Organic aerosol formation from photochemical oxidation of diesel exhaust in a smog chamber. , 2007, Environmental science & technology.

[2]  Stuart J Day,et al.  Effects of vehicle type and fuel quality on real world toxic emissions from diesel vehicles , 2008 .

[3]  M. Maricq.  Chemical characterization of particulate emissions from diesel engines: A review , 2007 .

[4]  R. Derwent,et al.  Multi-day ozone formation for alkenes and carbonyls investigated with a master chemical mechanism under European conditions , 2005 .

[5]  Tami C. Bond,et al.  Compositional characterization of PM2.5 emitted from in-use diesel vehicles , 2010 .

[6]  W. Carter.  Development of Ozone Reactivity Scales for Volatile Organic Compounds , 1994 .

[7]  Robert Harley,et al.  On-Road Measurement of Light-Duty Gasoline and Heavy-Duty Diesel Vehicle Emissions , 2009 .

[8]  R. Derwent,et al.  Development of a reduced speciated VOC degradation mechanism for use in ozone models , 2002 .

[9]  Dimitrios T. Hountalas,et al.  Theoretical study of the effects of engine parameters on performance and emissions of a pilot ignited natural gas diesel engine , 2010 .

[10]  Andrew J. Kean,et al.  Carbonyl and nitrogen dioxide emissions from gasoline- and diesel-powered motor vehicles. , 2008, Environmental science & technology.

[11]  G. Voth,et al.  The relative roles of acetylene and aromatic precursors during soot particle inception , 2004 .

[12]  D Hassel,et al.  Determination of VOC-components in the exhaust of gasoline and diesel passenger cars , 1999 .

[13]  Klaus Wirtz,et al.  Is benzene a precursor for secondary organic aerosol? , 2005, Environmental science & technology.

[14]  C. Kim,et al.  Comparison studies on sintering phenomenon of diesel oxidation catalyst depending upon aging conditions , 2012 .

[15]  Robert Vidon,et al.  Emissions of unregulated pollutants from European gasoline and diesel passenger cars , 2006 .

[16]  Gang Lv,et al.  Carbonyl compound emissions from a heavy-duty diesel engine fueled with diesel fuel and ethanol-diesel blend. , 2010, Chemosphere.

[17]  Nigel N Clark,et al.  Factors Affecting Heavy-Duty Diesel Vehicle Emissions , 2002, Journal of the Air & Waste Management Association.

[18]  Christine Wiedinmyer,et al.  A review of Secondary Organic Aerosol (SOA) formation from isoprene , 2009 .

[19]  Robert Henry Hammerle,et al.  Organic emissions profile for a light-duty diesel vehicle , 1999 .

[20]  J. Schauer,et al.  Light- and Heavy-Duty Vehicle Emission Factors of PM Species Based on Freeway Measurements and Comparison With Tunnel and Dynamometer Studies , 2007 .

[21]  Chao He,et al.  Comparison of carbonyl compounds emissions from diesel engine fueled with biodiesel and diesel , 2009 .

[22]  C. D. Rakopoulos,et al.  Emission characteristics of high speed, dual fuel, compression ignition engine operating in a wide range of natural gas/diesel fuel proportions , 2010 .

[23]  Georgios Karavalakis,et al.  Influence of oxidized biodiesel blends on regulated and unregulated emissions from a diesel passenger car. , 2010, Environmental science & technology.

[24]  Dimitrios C. Rakopoulos,et al.  Exhaust emissions of diesel engines operating under transient conditions with biodiesel fuel blends , 2012 .

[25]  Benjamín Pla,et al.  Comparative study of regulated and unregulated gaseous emissions during NEDC in a light-duty diesel engine fuelled with Fischer Tropsch and biodiesel fuels , 2011 .

[26]  Manuel Pujadas,et al.  Factors influencing the number distribution and size of the particles emitted from a modern diesel vehicle in real urban traffic , 2012 .

[27]  R. Okamoto,et al.  Emissions of toxic pollutants from compressed natural gas and low sulfur diesel-fueled heavy-duty transit buses tested over multiple driving cycles. , 2005, Environmental science & technology.

[28]  Greg Yarwood,et al.  Model sensitivity evaluation for organic carbon using two multi-pollutant air quality models that simulate regional haze in the southeastern United States , 2006 .

[29]  Martin Weilenmann,et al.  Pre- and post-catalyst-, fuel-, velocity- and acceleration-dependent benzene emission data of gasoline-driven EURO-2 passenger cars and light duty vehicles , 2002 .

[30]  Nadezhda A. Slavinskaya,et al.  A modelling study of aromatic soot precursors formation in laminar methane and ethene flames , 2009 .

[31]  Thomas D. Durbin,et al.  Final report for measurement of primary particulate matter emissions from light-duty motor vehicles , 1998 .

[32]  Chih-Chung Chang,et al.  Assessment of reducing ozone forming potential for vehicles using liquefied petroleum gas as an alternative fuel , 2001 .

[33]  Martin Mohr,et al.  Comprehensive particle characterization of modern gasoline and diesel passenger cars at low ambient temperatures , 2005 .

[34]  D. Faedo,et al.  Effects of 30% v/v biodiesel/diesel fuel blend on regulated and unregulated pollutant emissions from diesel engines , 2011 .

[35]  B. Pla,et al.  Effects of low pressure exhaust gas recirculation on regulated and unregulated gaseous emissions dur , 2011 .

[36]  Hsi-Hsien Yang,et al.  Effects of the biodiesel blend fuel on aldehyde emissions from diesel engine exhaust , 2008 .

[37]  A. Forss,et al.  Methane, benzene and alkyl benzene cold start emission data of gasoline-driven passenger cars representing the vehicle technology of the last two decades , 2003 .

[38]  Shijin Shuai,et al.  Characteristics of carbonyl compounds emission from a diesel-engine using biodiesel–ethanol–diesel as fuel , 2006 .

[39]  Juan J. Hernández,et al.  Carbonyls speciation in a typical European automotive diesel engine using bioethanol/butanol–diesel blends , 2012 .