Impact of Test Cycle and Biodiesel Concentration on Emissions

Sze, Chien; Whinihan, Joan K.; Olson, Brian; Schenk, Charles; Sobotowski, Rafal A.

doi:10.4271/2007-01-4040

Cited by 37 publications

(19 citation statements)

References 8 publications

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“…However, the available emission data do not consistently show NO x to be increasing. Factors that affect NO x emissions from biodiesel include biodiesel source material [6], driving cycle, and average load [7], as well as engine and fuel system design and operating strategy [8].…”

Section: Database Descriptionmentioning

confidence: 99%

“…The objective of this analysis is to review the body of existing experimental data on the effect of B20 on emissions from heavyduty diesel engines and to assess whether this database is adequate for estimating the effect of B20 on the heavy-duty emission inventory. The EPA database was significantly augmented by the addition of 15 new studies [7,[9][10][11][12][13][14][15][16][17][18][19][20][21][22], and, in a few cases, data points in the existing EPA database were cor- rected based on a check of the original references. Because we discuss the results in terms of percent change in emissions, we have combined results from engine and vehicle testing studies.…”

Section: Database Descriptionmentioning

confidence: 99%

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Effect of biodiesel blends on North American heavy‐duty diesel engine emissions

Yanowitz

McCormick

2009

Euro J Lipid Sci & Tech

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We conducted an assessment of North American heavy-duty engine emission test results for biodiesel from 49 experimental studies, including both engine dynamometer and vehicle test results. Comparison with a commercial database showed that the engines in the emissions database are not representative of the existing North American in-use fleet as of 2007; more than 50% of the tested engines were of 1995 or earlier vintage. Nevertheless, the results show that the use of a common biodiesel blend (B20) consistently reduces emissions of particulate matter, hydrocarbons, and carbon monoxide by 10-20%. Tests with B20 show varying effects on oxides of nitrogen (NO x ). If results for pre-1992 two-cycle 6V-92TA(E) engines (which represent 0.2% of the 2007 in-use fleet but 28% of the engines tested) are removed, then there is no statistical evidence that the average NO x emissions from B0 and B20 are different (p value of 0.50 for an estimated average increase of 1%). Several researchers have used changes in engine calibration to eliminate any NO x penalty associated with B20 (in engines that show an increase in NO x with B20), while still maintaining the advantages of B20 in reducing other pollutants. The emissions effect of B20 on heavyduty diesel truck emissions did not show any correlation with model year or type of fuel injection equipment.

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Section: Database Descriptionmentioning

confidence: 99%

Section: Database Descriptionmentioning

confidence: 99%

Effect of biodiesel blends on North American heavy‐duty diesel engine emissions

Yanowitz

McCormick

2009

Euro J Lipid Sci & Tech

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“…The potential for increase in NO x emissions has been recognized as a major concern to the application of biodiesel. This concern has resulted in a number of earlier studies to measure NO x emissions from various biodiesel mixtures (Durbin et al, 2000;US EPA, 2002;McCormick et al, 2006;Sze et al, 2007;Durbin et al, 2011).…”

Section: Introductionmentioning

confidence: 97%

Impact of biodiesel and renewable diesel on emissions of regulated pollutants and greenhouse gases on a 2000 heavy duty diesel truck

Biswas

Robertson

et al. 2015

Atmospheric Environment

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“…In general, biodiesel has a lower heating value and higher natural cetane value, viscosity and density than fossil diesel [3,4]. As a result of the different physicochemical character, biodiesel has been found to affect emissions of diesel engines [5][6][7][8][9][10]. In general, particulate matter (PM), carbon monoxide (CO) and unburned hydrocarbons (HCs) seem to decrease with use of biodiesel.…”

Section: Introductionmentioning

confidence: 99%