Examination of the oxidation behavior of biodiesel soot

Song, Juhun; Alam, Mahabubul; Boehman, André L.; Kim, Unjeong

doi:10.1016/j.combustflame.2006.06.010

Cited by 399 publications

(233 citation statements)

References 41 publications

(57 reference statements)

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“…The HTO-TDMA has little heat or mass transfer limitation, while in TGA method, there is heat and mass transfer limitation associated with bulk soot samples. The oxidation rates of biodiesel soot are always higher than those of diesel soot in the present study and in the literature (Jung et al 2006;Song et al 2006;Strzelec et al 2011). For the three fuels, the oxidation rate decreases in the order of biodiesel, LSD, and ULSD, being the highest for biodiesel particulate.…”

Section: Particle Oxidationsupporting

confidence: 69%

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Investigation on Particulate Oxidation from a DI Diesel Engine Fueled with Three Fuels

Tian

Cheung

Huang

2012

Aerosol Science and Technology

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In this study, particles generated from a direct-injection (DI) diesel engine fueled with biodiesel, ultra-low-sulfur diesel (ULSD, <10 ppm-wt), and low-sulfur diesel (LSD, <500 ppm-wt) were investigated experimentally for their oxidation properties, using the thermogravimetric analysis (TGA), at five engine loads. Kinetic analysis of particulate oxidation was conducted based on the mass loss curves obtained from the TGA. The activation energy was found to be in the range of 142-175, 76-127, and 133-162 kJ/mol for the particulate samples for ULSD, biodiesel, and LSD, respectively. The particulate oxidation rate decreases with the increase of engine load for each fuel, and at each engine load, the oxidation rate decreases in the order of biodiesel, LSD, and ULSD. The primary particle size, nanostructure, and volatile fraction were also investigated for different particulate samples. The results indicate that the higher oxidation rate of biodiesel particles could be related to the smaller primary particle size, the more disordered nanostructure, and the larger volatile fraction, compared with the ULSD and LSD particles. The increase of sulfur content in a diesel fuel has a limited influence on primary particle size and nanostructure, while inducing a larger volatile fraction, which might be one of the reasons for the stronger oxidative reactivity of the LSD particles, compared with the ULSD particles.

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Section: Particle Oxidationsupporting

confidence: 69%

“…A few literatures compared oxidation properties of particulates from biodiesel and diesel fuels (Boehman et al 2005;Jung et al 2006;Song et al 2006;Strzelec et al 2011); however, there is lack of investigation on the effect 1350 T. LU ET AL. of fuel sulfur on the oxidation properties of the particulate.…”

Section: Introductionmentioning

confidence: 99%

Investigation on Particulate Oxidation from a DI Diesel Engine Fueled with Three Fuels

Tian

Cheung

Huang

2012

Aerosol Science and Technology

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“…These findings also suggest the composition of particulate (volatile/carbonaceous ratio) differs depending on the level of FAME, which may have implications for regeneration of particle aftertreatment. Papers by Boehman, Song and Zabetta [23,24,25] suggest that this is in fact the case. Although it was not investigated here, the same authors report an increase in the soot reactivity and a more amorphous (less graphitic) soot micro-structure for soot derived from fuel containing FAME.…”

Section: Figure 6 Nucleation Mode Particle Emissions (By Dms) Over Nmentioning

confidence: 99%

The Impact of Biodiesel on Particle Number, Size and Mass Emissions from a Euro4 Diesel Vehicle

Tinsdale¹,

Price²,

Chen³

2010

SAE Int. J. Engines

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This item was submitted to Loughborough's Institutional Repository (https://dspace.lboro.ac.uk/) by the author and is made available under the following Creative Commons Licence conditions.For the full text of this licence, please go to: http://creativecommons.org/licenses/by-nc-nd/2.5/ ABSTRACTNew European emissions legislation (Euro5) specifies a limit for Particle Number (PN) emissions and therefore drives measurement of PN during vehicle development and homologation. Concurrently, the use of biofuel is increasing in the marketplace, and Euro5 specifies that reference fuel must contain a bio-derived portion.Work was carried out to test the effect of fuels containing different levels of Fatty Acid Methyl Ester (FAME) on particle number, size, mass and composition. Measurements were conducted with a Cambustion Differential Mobility Spectrometer (DMS) to time-resolve sub-micron particles (5-1000nm), and a Horiba Solid Particle Counting System (SPCS) providing PN data from a Euro5-compliant measurement system. To ensure the findings are relevant to the modern automotive business, testing was carried out on a Euro4 compliant passenger car fitted with a high-pressure common-rail diesel engine and using standard homologation procedures.It was found that using FAME decreased total PN emissions, by 16% over the Type I drive cycle (NEDC) for a 30% biodiesel (B30) compared to mineral fuel (B0). FAME also decreased accumulation mode PN and carbonaceous mass, by 20-30% for B30 versus B0, with a consequent reduction in Diesel Particulate Filter loading rate. A 25% increase in the nucleation mode PN was found when using B30 versus B0, and the higher molecular-weight organic mass fraction also increased. Increases in nitrogen oxides when using FAMEcontaining fuels were also confirmed.

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“…The presence of oxygen in palm biodiesel enhances the local premixed combustion of hydrocarbon with oxygen whereas the absence of aromatic rings inhibits the formation of soot and the sooty yellowish flame brush downstream. It has also been reported that the soot generated from biodiesel is rapidly oxidised due to the initial incorporation of oxygen groups in the molecule [20].…”

Section: Flame Imagingmentioning

confidence: 99%

Spray Combustion Characteristics of Palm Biodiesel

Chong

Hochgreb

2012

Combustion Science and Technology

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The potential of Palm Methyl Esters (PME) as an alternative fuel for gas turbines is investigated using a swirl burner. The main air flow is preheated to 623 K and a swirling spray flame is established at atmospheric pressure. The spray combustion characteristics of PME are compared to diesel and Jet-A1 fuel under the same burner power output of 6 kW. Investigation of the fuel atomizing characteristics using Phase Doppler Anemometry (PDA) shows that most droplets are distributed within the flame reaction zone region. PME droplets exhibit higher Sauter Mean Diameter (SMD) values than baseline fuels, and thus higher droplet penetration length and longer evaporation timescales. PME swirl flame presents a different visible flame reaction zone while combusting with low luminosity and produces no soot. NOx emissions per unit energy are also reduced by using PME relative to those of conventional fuels, in spite of the ~17% higher specific fuel consumption and slightly larger droplets.

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Examination of the oxidation behavior of biodiesel soot

Cited by 399 publications

References 41 publications

Investigation on Particulate Oxidation from a DI Diesel Engine Fueled with Three Fuels

Investigation on Particulate Oxidation from a DI Diesel Engine Fueled with Three Fuels

The Impact of Biodiesel on Particle Number, Size and Mass Emissions from a Euro4 Diesel Vehicle

Spray Combustion Characteristics of Palm Biodiesel

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