Effects of Diesel Fuel Sulfur Level on Performance of a Continuously Regenerating Diesel Particulate Filter and a Catalyzed Particulate Filter

Liang, Cho Y.; Baumgard, Kirby J.; Gorse, Robert A.; Orban, John; Storey, John; Tan, Julian; Thoss, J. E.; Clark, Wendy

doi:10.4271/2000-01-1876

Cited by 16 publications

(9 citation statements)

References 2 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…TEM and AMS analysis of the UFPs emitted during Euro5 DPF regeneration are consistent with previous works suggesting that at high temperatures, sulfur from fuel as well from lubricating oil previously stored on the catalyst surface, is released as SO 2 , converted to SO 3 in the DOC, forming then sulfuric acid and/or bisulfate/sulfate. 19,36,37,40,41,45,47,[60][61][62] The major conclusions drawn from the present investigations are as follows. The active regeneration of Euro5 vehicles produced significant emissions of the particles both in terms of total number and total mass concentration, reaching up to 400-500 µg/m 3…”

Section: Resultsmentioning

confidence: 96%

Physico-Chemical Characterization of Fine and Ultrafine Particles Emitted during Diesel Particulate Filter Active Regeneration of Euro5 Diesel Vehicles

R’Mili

Boréave

Même

et al. 2018

Environ. Sci. Technol.

View full text Add to dashboard Cite

Diesel particulate filters (DPFs) are commonly employed in modern passenger cars to comply with current particulate matter (PM) emission standards. DPFs requires periodic regeneration to remove the accumulated matter. During the process, high-concentration particles, in both nucleation and accumulation modes, are emitted. Here, we report new information on particle morphology and chemical composition of fine (FPs) and ultrafine particles (UFPs) measured downstream of the DPF during active regeneration of two Euro 5 passenger cars. The first vehicle was equipped with a close-coupled diesel oxidation catalyst (DOC) and noncatalyzed DPF combined with fuel borne catalyst and the second one with DOC and a catalyzed-diesel particle filter (CDPF). Differences in PM emission profiles of the two vehicles were related to different after treatment design, regeneration strategies, and vehicle characteristics and mileage. Particles in the nucleation mode consisted of ammonium bisulfate, sulfate and sulfuric acid, suggesting that the catalyst desulfation is the key process in the formation of UFPs. Larger particles and agglomerates, ranging from 90 to 600 nm, consisted of carbonaceous material (soot and soot aggregates) coated by condensable material including organics, ammonium bisulfate and sulfuric acid. Particle emission in the accumulation mode was due to the reduced filtration efficiency (soot cake oxidation) throughout the regeneration process.

show abstract

Section: Resultsmentioning

confidence: 96%

Physico-Chemical Characterization of Fine and Ultrafine Particles Emitted during Diesel Particulate Filter Active Regeneration of Euro5 Diesel Vehicles

R’Mili

Boréave

Même

et al. 2018

Environ. Sci. Technol.

View full text Add to dashboard Cite

show abstract

“…Over the period of time since the California diesel fuel regulation was put in place, diesel engine technology has evolved considerably. Major studies have been conducted within the US, 11–15 Japan, 16,17 and Europe 18 to examine the impacts of fuel properties on emissions with changing engine technology, and several reviews have been conducted by different authors. 19–24 Based on his analysis, Hochhauser suggested that reductions in density and polyaromatic compounds, as opposed to total aromatics, lead to reductions in NO x and/or PM, although the existing data were complicated by a lack of orthogonality among variables, a small number of engines/vehicles, and differences in test cycles in many studies.…”

Section: Introductionmentioning

confidence: 99%

Assessment of the emissions from the use of California Air Resources Board qualified diesel fuels in comparison with Federal diesel fuels

Hajbabaei

Johnson

Guthrie

et al. 2012

International Journal of Engine Research

View full text Add to dashboard Cite

The California Air Resources Board (CARB) has regulated the properties of diesel fuel sold in California since 1988 to lower emissions of particulate matter (PM) and oxides of nitrogen (NO x ). Although many studies have shown that reduced levels of aromatics and higher cetane numbers can improve emissions, the actual impact of CARB fuels on inuse diesel emissions has not yet been extensively studied, especially as diesel engine and aftertreatment technology has evolved over the years. This study evaluates the differences between California and Federal diesel fuels with heavy-duty engine and chassis dynamometer tests. The engine dynamometer results showed that NO x emissions for the Federal fuels ranged from 4.7% to 9.5% higher than the CARB diesel. These NO x reductions are similar to the estimates being used in the latest regulations. The chassis dynamometer test results did not show as consistent trends for NO x as those seen for the engine dynamometer testing. For the chassis dynamometer testing, four out of ten vehicles showed consistent reductions in NO x , with emissions for the Federal fuels ranging from 3.3% to 9.9% higher than the CARB diesel, while the other six vehicles did not show consistent fuel impacts. On an absolute level, the NO x benefit for CARB diesel shows a decline with continuing advances in engine technology. The results showed that CARB diesel did not show strong benefits for PM. The results also showed that the introduction of aftertreatment systems for PM and NO x will, over time, largely eliminate any potential benefits that might be obtained through the use of CARB diesel, although NO x benefits will persist through to 2020.

show abstract

“…Sulfur in the exhaust, however, can be oxidized over the CR-DPF, forming sulfates, which are measured as PM. Sulfur oxides also compete for the critical NO and NO 2 reaction, making the regeneration characteristics less effective (Liang et al 2000).…”

Section: -55mentioning

confidence: 99%

Technology Roadmap for the 21st Century Truck Program, a government-industry research partnership

2000

View full text Add to dashboard Cite

Effects of Diesel Fuel Sulfur Level on Performance of a Continuously Regenerating Diesel Particulate Filter and a Catalyzed Particulate Filter

Cited by 16 publications

References 2 publications

Physico-Chemical Characterization of Fine and Ultrafine Particles Emitted during Diesel Particulate Filter Active Regeneration of Euro5 Diesel Vehicles

Physico-Chemical Characterization of Fine and Ultrafine Particles Emitted during Diesel Particulate Filter Active Regeneration of Euro5 Diesel Vehicles

Assessment of the emissions from the use of California Air Resources Board qualified diesel fuels in comparison with Federal diesel fuels

Technology Roadmap for the 21st Century Truck Program, a government-industry research partnership

Contact Info

Product

Resources

About