Investigation Of Performance And Emissions In A Heavy-duty Diesel Engine With Nano-aluminium Added Into Diesel Fuel Belnds

The last two decades have seen an increasing interest in engine modification,alternative fuels,novel methods in combustion in order to satisfied more stringent emissions regulations in internal combustion engines.Scientists and engineers in nanoscience and nanotechnologies,thereby,put forward metal-based nano-particles in terms of their low redox potential,high surface-to-volume ratio and high thermal conductivity.This project was aimed at investigating the combustion characteristics and emission performance of nano-aluminium added into diesel fuel blends.Before the engine tests,numerous experimental tests were conducted for selection of concentration and categories in nano-additives(including nano-Al and nano-Ni),as well as surfactant(including ethanol and Span(?)80)in synthesis of nano-Al fuel blends.After a serials of observations in half a month,the sample using 4%ethanol and 30 ppm nano-Al added into diesel remain constant as homogeneous liquid,and it is therefor that this sample were chosen in diesel engine tests.In the next section,the results from engine tests were compared three fuel blends in this project.In ESC cycle,the BSFC was declined when B0E4N30 compared to BOE4,by 7.83%.In addition,all pollutants were decreased by using B0E4N30 in engine tests.Compared with B0E4,the most apparently emission drop was HC,by 16.63%,followed by the figure for CO emission,by 13.06%,and that for NOx by 8.01%.In order to analyse the physical-chemical properties of particulates in exhaust line,there was self-designed filter for particles collection.In microscopy,the morphology and concentration did not show any difference in B0E4N30,it was thereby that nano-Al did not contributed to the concentration of soot in all.Besides,the results from XPS showed that the particulates in exhaust line contained AL2O3,which means that the nano-Al was finished oxidation reactions.