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| Particulate emission characteristics of vehicle diesel engine fuelled with palm-oil derived biodiesel |
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Abstract Characteristics of particulate emission of engines fuelled with different blend ratios of palm oil derived biodiesel and Ultra Low Sulfur Diesel (ULSD) were studied using a China-IV diesel engine. Five biodiesel-ULSD blends of 0%、10%、20%、50% and 100% were tested. The particle mass (PM) concentration, particle number (PN) density, and particle size distribution were measured by DMS500 particulate spectrometer. The results showed PM concentration decreased with the increase of biodiesel blend ratios. The total PN density decreased significantly at high load,while increased at low and medium loads. Bimodal PN size distribution was observed corresponding to nucleation mode and accumulation mode particles. Comparing with ULSD, biodiesel exhibited higher percentage of nucleation mode PN emissions and lower percentage of accumulation mode PM emission. Also, biodiesel exhibited smaller particulatd mean diameter than that of ULSD.
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Received: 28 December 2013
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