The use of oxygenated fuels seems to be a promising solution for reducing particulate emissions in existing and future diesel motor vehicles. In this work, the influence of the addition of oxygenated hydrocarbons to diesel fuels on performance and emission parameters of a diesel engine is experimentally studied. 3-Pentanone (C 5 H 10 O) and Methyl anon (C 7 H 12 O) were used as oxygenated fuel additives. It was found that the addition of oxygenated hydrocarbons reduced the production of soot precursors with respect to the availability of oxygen content in the fuel. On the other hand, a serious increase of NOx emissions is observed. For this reason the use of exhaust gas recirculation (EGR) to control NOx emissions is examined. From the analysis of it is examined experimental findings, it is seen that the use of EGR causes a sharp reduction in NOx and smoke simultaneously. On the other hand, EGR results in a slight reduction of engine efficiency and maximum combustion pressure which in any case does not alter the benefits obtained from the oxygenated fuel.
Methane was generated from cotton waste, while considering its pollution in textile industries. Cotton waste includes solid content and is rich in cellulose having a moisture content of 8.8%. It is difficult to form slurry as the waste float on water and hence an experimental set up has been made like a batch type digester and experiments were conducted with a different proposition of water with or without addition of seeding materials. It was found that cotton waste with 5 to 7.5% seeding material like cow dung or pig dung at temperatures of 30 to 35 0 C generated bio gas continuously, with a reasonably high yield from the tenth day after feeding. The gas contained rich methane and was tested in a single cylinder diesel engine as a dual fuel had the tendency to save 60% of diesel.
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