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.
1,4 dioxane, a new ad di tive al lows the splash blend ing of eth a nol in die sel in a clearso lu tion. The ob jec tive of this in ves ti ga tion is to first cre ate a sta ble eth a nol-die sel blended fuel with 10% 1,4 dioxane ad di tive, and then to gen er ate per for mance, com bus tion and emis sions data for eval u a tion of dif fer ent eth a nol con tent on a single cyl in der die sel en gine with and with out ther mal bar rier coat ing. Re sults show im proved per for mance with blends com pared to neat fuel for all condi tions of the en gine. Dras tic re duc tion in smoke den sity is found with the blends as com pared to neat die sel and the re duc tion is still better for coated en gine. NO x emis sions were found to be high for coated en gines than the nor mal en gine for the blends. The ox y gen en riched fuel in creases the peak pres sure and rate of pres sure rise with in crease in eth a nol ra tio and is still su pe rior for coated en gine. Heat release pat tern shows higher pre mixed com bus tion rate with the blends. Lon ger ig nition de lay and shorter com bus tion du ra tion are found with all blends than neat diesel fuel.
Abstract:The main objective of this study is to improve the performance and cleaning up of diesel engine's exhaust by fumigating known quantity of methanol and methyl ethyl ketone individually using a custom made Electronic fuel injector controlled by a microprocessor. To control the emission from diesel engine and to improve performance, alternate fuel and in-cylinder control techniques are used. The experimental study has been carried out in a single cylinder diesel engine. The experimental set-up is such that known quantity of methyl ethyl ketone is fumigated in the intake manifold using a microprocessor controlled electronic fuel injector. Results of the experimental study of a DI Diesel engine are presented, which show the influence of partial premixing fumigation of the intake air with methanol and methyl ethyl ketone fuel on the exhaust emissions and the engine performance parameters The result shows an appreciable reduction of emissions, such as, oxides of nitrogen, smoke density and marginal increase in the performance in fumigation mode for both the fuels and are compared with those of normal diesel engine.
Alternative sources for petroleum fuels have been the prime concern of most of the environmentalists. It is also a concern for economists due to the depletable nature of the fossil fuel. Vegetable oils are considered as good alternatives to diesel as their properties are close to diesel. At present biodiesel is commercially produced from the vegetable oils by esterification processes. Since most of these oils are edible, its cost restricts the usage. The de oiled cakes after crushing the seeds contains around 2% of oil with less fatty materials is aimed in this study. The fuel is prepared by adding various dry de oiled cake powders (coconut, neem, ground nut and gingili) at different proportions ranging from 3 to 25% by weight with diesel. Experimental results reveal that, the fuel has the potential to reduce smoke, CO emissions simultaneously along with marginal increase in brake thermal efficiency. The combustion characteristic of each fuel is analysed and recorded.
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