Please wait a minute...

Frontiers of Environmental Science & Engineering

Front Envir Sci Eng    2012, Vol. 6 Issue (4) : 463-469     https://doi.org/10.1007/s11783-011-0317-3
RESEARCH ARTICLE
Effects of a diesel oxidation catalyst on gaseous pollutants and fine particles from an engine operating on diesel and biodiesel
Xiaoyan SHI1,2, Kebin HE1(), Weiwei SONG1, Xingtong WANG1, Jihua TAN1
1. School of Environment, Tsinghua University, Beijing 100084, China; 2. Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
Download: PDF(389 KB)   HTML
Export: BibTeX | EndNote | Reference Manager | ProCite | RefWorks
Abstract

The effects of a diesel oxidation catalytic (DOC) converter on diesel engine emissions were investigated on a diesel bench at various loads for two steady-state speeds using diesel fuel and B20. The DOC was very effective in hydrocarbon (HC) and CO oxidation. Approximately 90%–95% reduction in CO and 36%–70% reduction in HC were realized using the DOC. Special attention was focused on the effects of the DOC on elemental carbon (EC) and organic carbon (OC) fractions in fine particles (PM2.5) emitted from the diesel engine. The carbonaceous compositions of PM2.5 were analyzed by the method of thermal/optical reflectance (TOR). The results showed that total carbon (TC), OC and EC emissions for PM2.5 from diesel fuel were generally reduced by the DOC. For diesel fuel, TC emissions decreased 22%–32% after the DOC depending on operating modes. The decrease in TC was attributed to 35%–97% decrease in OC and 3%–65% decrease in EC emissions. At low load, a significant increase in the OC/EC ratio of PM2.5 was observed after the DOC. The effect of the DOC on the carbonaceous compositions in PM2.5 from B20 showed different trends compared to diesel fuel. At low load, a slight increase in EC emissions and a significant decrease in OC/EC ratio of PM2.5 after DOC were observed for B20.

Keywords diesel oxidation catalyst (DOC)      diesel particulate matters      elemental carbon (EC)      organic carbon (OC)      biodiesel     
Corresponding Author(s): HE Kebin,Email:hekb@tsinghua.edu.cn   
Issue Date: 01 August 2012
 Cite this article:   
Xiaoyan SHI,Kebin HE,Weiwei SONG, et al. Effects of a diesel oxidation catalyst on gaseous pollutants and fine particles from an engine operating on diesel and biodiesel[J]. Front Envir Sci Eng, 2012, 6(4): 463-469.
 URL:  
http://journal.hep.com.cn/fese/EN/10.1007/s11783-011-0317-3
http://journal.hep.com.cn/fese/EN/Y2012/V6/I4/463
Service
E-mail this article
E-mail Alert
RSS
Articles by authors
Xiaoyan SHI
Kebin HE
Weiwei SONG
Xingtong WANG
Jihua TAN
Fig.1  Schematic diagram of dilution and sampling system
Fig.2  Effects of DOC on (a) NO, (b) HC, (c) CO, and (d) PM emissions at various test modes (speed/load): diesel fuel
Fig.3  Emissions of (a) TC, (b) OC, (c) EC fractions in PM from engine out and after the DOC at various test modes (speed /load): diesel fuel
speed (r·min-1)/ load%EC/(mg·g–1)OC/(mg·g–1)TC/(mg·g–1)
dieseldiesel+ DOCdieseldiesel+ DOCdieseldiesel+ DOC
2125/250.0160.0070.150.1080.1650.115
2125/500.050.0370.1480.1180.1980.155
2125/750.0840.0820.1440.0730.2290.155
2690/250.0320.0290.3060.2280.3370.258
2690/500.1350.120.230.1620.3650.282
2690/750.2060.1340.2210.1820.4270.317
Tab.1  Effect of DOC on fuel based emission factor (EF) of TC, EC, and OC in PM, diesel fuel
Fig.4  Effects of DOC on the percentages of OC (OC1–OC4) and EC (EC1–EC2) fractions in TC and OC/EC ratios: (a) diesel; (b) diesel; (c) B20
Fig.5  Emissions of (a) TC, (b) OC, and (c) EC fractions in PM from engine out and after DOC using B20 and compared those with base diesel fuel
1 Maricq M M. Chemical characterization of particulate emissions from diesel engines: a review. Aerosol Science , 2007, 38(11): 1079–1118
doi: 10.1016/j.jaerosci.2007.08.001
2 US Environmental Protection Agency (EPA). Health effects assessment document for diesel engine exhaust. EPA/600/8-90/057F , 2002
3 Shi J P, Mark D, Harrison R M. Characterization of particles from a current technology heavy-duty diesel engine. Environmental Science & Technology , 2000, 34(5): 748–755
doi: 10.1021/es990530z
4 ?lander T A, Leskinen A, Raunemaa T, Rantanen L. Characterization of diesel particles: effects of fuel reformulation, exhaust aftertreatment and engine operation on particle carbon composition and volatility. Environmental Science & Technology , 2004, 38(9): 2707–2714
doi: 10.1021/es030129j
5 Shah S D, Cocker D R III, Miller J W, Norbeck J M. Emission rates of particulate matter and elemental and organic carbon from in-use diesel engines. Environmental Science & Technology , 2004, 38(9): 2544–2550
doi: 10.1021/es0350583
6 Hosoya M, Shimoda M. The application of diesel oxidation catalysts to heavy duty diesel engines in Japan. Applied Catalysis B: Environmental , 1996, 10(1-3): 83–97
doi: 10.1016/0926-3373(96)00025-2
7 Maricq M M, Chase R E, Xu N, Laing P M. The effect of the catalytic converter and fuel sulfur level on motor vehicle particulate matter emissions: light duty diesel vehicles. Environmental Science & Technology , 2002, 36(7): 283–289
doi: 10.1021/es010962l
8 Shah S D, Cocker D R III, Johnson K C, Lee J M, Soriamo B L, Miller J W. Reduction of particulate matter emissions from diesel backup generators equipped with four different exhaust aftertreatment devices. Environmental Science & Technology , 2007, 40(14): 5070–5076
doi: 10.1021/es0614161
9 Graboski M S, McCormick R L. Combustion of fat and vegetable oil derived fuels in diesel engines. Progress in Energy and Combustion Science , 1998, 24(2): 125–164
doi: 10.1016/S0360-1285(97)00034-8
10 Lapuerta M, Armas O, Rodríguez-Fernández J. Effect of biodiesel fuels on diesel engine emissions. Progress in Energy and Combustion Science , 2008, 34(2): 198–223
doi: 10.1016/j.pecs.2007.07.001
11 Durbin T D, Collins J R, Norbeck J M, Smith M R. Effects of biodiesel, biodiesel blends and a synthetic diesel on emissions from light heavy-duty diesel vehicles. Environmental Science & Technology , 2002, 34(3): 349–355
doi: 10.1021/es990543c
12 US Environmenral Protection Agency (EPA). A Comprehensive analysis of biodiesel impacts on exhaust emissions. Draft Technical Report EPA420-P-02–001 , 2002
13 Lee S W, Herage T, Yong B. Emission reduction potential from the combustion of soy methyl ester fuel blended with petroleum distillate fuel. Fuel , 2004, 83(11-12): 1607–1613
doi: 10.1016/j.fuel.2004.02.001
14 Zhang J, He K, Shi X, Zhao Y. Effect of SME biodiesel blends on PM2.5 emission from a heavy-duty engine. Atmospheric Environment , 2008, 43(15): 2442–2448
doi: 10.1016/j.atmosenv.2009.01.052
15 Zhang Z H, Cheung C S, Chan T L, Yao C D. Emission reduction from diesel engine using fumigation methanol and diesel oxidation catalyst. Science of the Total Environment , 2009, 407(15): 4497–4505
doi: 10.1016/j.scitotenv.2009.04.036
16 Vaaraslahti K, Ristim?ki J, Virtanen A, Keskinen J, Giechaskiel B, Soll A A. Effect of oxidation catalysts on diesel soot particles. Environmental Science & Technology , 2006, 40(15): 4776–4781
doi: 10.1021/es060615h
17 Bagley S T, Gratz L, Johnson J H, Mcdonald J F. Effects of an oxidation catalytic converter and a biodiesel fuel on the chemical, mutagenic, and particle size characteristics of emissions from a diesel engine. Environmental Science & Technology , 1998, 32(9): 1183–1191
doi: 10.1021/es970224q
18 Tang S, Frank B P, Lanni T, Rideout G, Meyer N, Beregszaszy C. Unregulated emissions from a heavy-duty diesel engine with various fuels and emission control systems. Environmental Science & Technology , 2007, 41(14): 5037–5043
doi: 10.1021/es0622249
19 Chow J C, Watson J G, Pritchett L C, Crow D, Lowenthal D H, Merrifield T. Comparison of IMPROVE and NIOSH carbon measurements. Aerosol Science and Technology , 2001, 34(1): 23–34
Related articles from Frontiers Journals
[1] Xuemin Wu,Fenfen Zhu,Juanjuan Qi,Luyao Zhao,Fawei Yan,Chenghui Li. Challenge of biodiesel production from sewage sludge catalyzed by KOH, KOH/activated carbon, and KOH/CaO[J]. Front. Environ. Sci. Eng., 2017, 11(2): 3-.
[2] Yuvarajan Devarajan,Ravi kumar Jayabal,Devanathan Ragupathy,Harish Venu. Emissions analysis on second generation biodiesel[J]. Front. Environ. Sci. Eng., 2017, 11(1): 3-.
[3] Jinbao WU, Zongqiang GONG, Liyan ZHENG, Yanli YI, Jinghua JIN, Xiaojun LI, Peijun LI. Removal of high concentrations of polycyclic aromatic hydrocarbons from contaminated soil by biodiesel[J]. Front Envir Sci Eng Chin, 2010, 4(4): 387-394.
Viewed
Full text


Abstract

Cited

  Shared   
  Discussed