Abstract
Palm methyl ester (PME) is a renewable biofuel that is produced by the transesterification of palm oi and serves as a popular alternative fuel used in the transportation sector, particularly in Asia. The objective of this investigation was to study the combustion characteristics of flames of pre-vaporized PME/diesel blends in a laminar flame environment at initial equivalence ratios of 2, 3 and 7, which are of interest in diferent flame zones in engines. The equivalence ratio was changed by altering the fuel flow rate, while maintaining the air flow rate constant. The global CO emission index of the PME flames decreased with the PME content at the fuel at equivalence ratios of 3 and 7. The variation of NO emission index at all equivalence ratios and CO emission index at the equivalence ratio of 2 was non-monotonic with the PME concentration in the fuel. Temperature, flame radiation and soot volume concentration measurements suggest differences in the characteristics of soot particles formed during the combustion of blend flames.
Published Version
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