Abstract
Almost all algae-based biofuels have no carbon in their composition, their use as biodiesel could gradually replace the fast depleting fossil fuels. Stoechospermum marginatum macroalgae species were considered for this research due to their growth rate, oil yield, fatty acid composition, cell structure and ecological location. There is, however, a lack of knowledge on the technology for mass production of biodiesel from macroalgae and the effect of this type of biodiesel on combustion in modern compression ignition engines. The bio-oil had been produced making use of soxhlet method through a lipid extraction of 24.4% single stage transesterification was applied because of low free fatty acid content the yield of biodiesel had been optimised through different parameters. Through a transesterification, bio-oils were extracted from macroalgae and then biofuels were prepared by the mixing method and biofuel blends of 20% in volume with standard diesel and Al2O3 nanofluids were prepared and tested in a direct ignition engine for its emission characteristics below various load circumstances at a constant speed of 1500 rpm.
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