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Author: search.filters.author.Chollacoop, N.Subject: search.filters.subject.Particulate Matter

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    VISUALIZATION OF SOOT NANOSTRUCTURE FROM ETHANOL BLENDED BIODIESEL USING ELECTRON MICROSCOPY IMAGE ANALYSES
    (2022-09-14)
    Thin, Myat Hsu
    ;
    Karin, P.
    ;
    Srilomsak, M.
    ;
    Po-Ngen, W.
    ;
    Saisirirat, P.
    Characteristics of particulate matter from ethanol-blended biodiesel on the diesel engine in terms of nanostructure were investigated through electron microscopy. Commercial B20 fuel (20% palm and 80% diesel) was used as the baseline fuel and ethanol was blended at 5% and 10% with B20 fuel. The agglomerated particle size was reduced by increasing the weight ratio of ethanol. The average diameter sizes of the single primary nanoparticles of B20, B20E5, and B20E10 are about 20-40 nm while inter-planar spacing is about 0.404 nm, 0.383 nm, and 0.352 nm, respectively. The total fringe lengths of B20, B20E5, and B20E10 are approximately 521 nm, 470 nm, and 262 nm measured from the areas of 20 nm x 20 nm of primary nanoparticles.
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    CHARACTERIZATION OF PARTICULATE MATTERS EMITTED FROM BIOMASS COMBUSTION USING ELECTRON MICROSCOPY AND ENERGY DISPERSIVE X-RAY SPECTROSCOPY
    (2020-01-01)
    Mon Oo, H.
    ;
    Karin, P.
    ;
    Masomtob, M.
    ;
    Saisirirat, P.
    ;
    Chollacoop, N.
    Particulate Matters (PMs) emitted from biomass combustion including open burning of biomass agricultural residues, and forest fires must be reduced to protect both human health and the environment. The physical characteristics of morphology, elemental composition and nanostructure of particulate matters generated from biomass combustion were successfully investigated by using electron microscopy and energy dispersive X-ray spectroscopy (EDS) analysis with Scanning Electron Microscopy (SEM) and Transmission Electron Microscopy (TEM), and thermogravimetric analysis (TGA) was used to analyze the oxidation kinetics of particulate matters. Before biomass burning, it was found that about 65% of carbon fraction in biomass raw material while 95% of carbon fraction in soot and 84% in ash particles after burning. The average diameter size of single primary particles is approximately 36 nm. Nanostructure of the single primary particle of biomass soot is mainly composed of curve line carbon crystallites while metallic ash nanoparticle is composed of straight-line hatch patterns. The inter-planar spacing of fringes of biomass soot and ash crystallites is 0.36 nm and 0.28 nm, respectively. This article aims to study the different nanostructure of biomass forest leaves residual ash and soot such as agglomerated particles, primary particle's measurement using TEM image analysis.