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Author: search.filters.author.Hanamura, KatsunoriSubject: search.filters.subject.Biodiesel

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    Characterization of biodiesels and tire derived particulate matters in morphology and nanostructure
    (2022-01-01)
    Oh, Ban seok
    ;
    Karin, Preechar
    ;
    Srilomsak, Mek
    ;
    Chonvasin, Kritin
    ;
    Po-ngen, Watcharin
    Particulate Matters (PM) are known to be dangerous to human health and the environment. Regulations have been set to limit PM levels from vehicles, including compression ignition engine vehicles. The effect of increasing biodiesel content in the fuels has been investigated with respect to the PM using scanning electron microscopy (SEM) and transmission electron microscopy (TEM). PM from tire emissions were compared against diesel PM using SEM, energy dispersive x-ray spectroscopy (EDS), TEM, particle size analysis, x-ray diffraction (XRD), and Raman spectroscopy (RS). The SEM and TEM show that increasing the biodiesel content decreased the size of the PM agglomerate particles, primary particles, and fringes. The EDS, RS, and XRD show that Tire PM are mostly carbon with silicon, calcium, zinc, and other various trace elements. They also allow comparisons with diesel PM for the carbon nanostructure. The particle size analysis shows that Tire PM are generally larger than engine derived PM. The TEM showed that the nanostructure of the carbonaceous Tire PM was the same fringe structure as the engine derived PM. The Tire PM was successfully characterized using similar methods as engine derived soot. There is strong relationship between the increasing of biodiesel content and reduction of agglomerate size, primary particle size and average fringe length.
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    Characterization of biodiesel and soot contamination on four-ball wear mechanisms using electron microscopy and confocal laser scanning microscopy
    (2020-10-15)
    Oungpakornkaew, Pitchaporn
    ;
    Karin, Preechar
    ;
    Tongsri, Ruangdaj
    ;
    Hanamura, Katsunori
    Utilization of biodiesel as an alternative fuel has been increasing nowadays in term of quantity and ratio of bio-resource derived esters from B7 to B100. The tribological characteristic due to biodiesel application has been more interesting. Not only fuel dilution but also soot contamination in engine oil must be taken into account for the effect to the engine wear. This research employed carbon black as soot model and B7, B20 and B100 as contaminated fuel. Two blended grades of diesel engine oils (API CI-4 and CK4) were tested by a four-ball wear tester. Scanning electron microscopy (SEM) was used to investigate the wear characteristic. Three-dimensional images of wear scars and surface roughness were observed from confocal microscopy technique. The result shows that CK-4 has greater anti-wear performance and can maintain the lubricating performance when the oil is contaminated. For CI-4 cases, soot contamination causes increasing wear, but biodiesel fuel dilution shows wear reduction.
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    Characterization of Biodiesel Particle Emission in Trapping and Regeneration Processes on Cordierite Diesel Particulate Filter
    (2015-11-17)
    Siricholathum, Komkla
    ;
    Karin, Preechar
    ;
    Charoenphonphanich, Chinda
    ;
    Hanamura, Katsunori
    ;
    Chollacoop, Nuwong
    As well-known, the diesel engine has the highest thermal efficiency at the same load as compared with internal combustion engine but its disadvantage is particulate matter (PM) emitted to the atmosphere. The studies of this paper were divided into two parts. The first part studied the quantity of PM from the both diesel and biodiesel fuels at 80% load (2400 rpm) by the trapping process on diesel particulate filter (DPF) used in a partial flow dilution tunnel. The second part studied the regeneration process of PM under the flow rate of oxygen and nitrogen gas of 13.5 L/min with 10%, 15%, and 21% of oxygen gas. The result showed that amount of PM from biodiesel fuel was lower around two times than PM from diesel fuel. The duration in regeneration process of biodiesel's PM was shorter than diesel while increasing of oxygen percentage can reduce regeneration time.