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    Environmental pollution cost analysis of a diesel engine fueled with biogas-diesel-tire pyrolytic oil blends
    (Elsevier - Division Reed Elsevier India Pvt Ltd, 2021) Tunc, Nuri; Karagoz, Mustafa; Ciftci, Burak; Deniz, Emrah
    Fuels obtained from waste in seeking of sustainable and environmentally friendly fuel are promising for internal combustion engines. In this study, an environmental pollution cost analysis was performed for a diesel engine fueled with blends of pyrolytic oil - biogas - neat diesel fuel. Five different test fuels were studied. Neat diesel fuel (DF), the fuel mixture prepared by blending 10% pyrolytic oil to 90% neat diesel fuel by volume (DF90P10). While the DF90P10 fuel was supplied to the engine from the injector, the experiments were carried out with different fuel combinations created by delivering gaseous biogas at constant flow rates of 1, 3 and 5 L/min from the intake manifold (DF90P10B1, DF90P10B3, DF90P10B5). The experiments were carried out in a single-cylinder, air-cooled, direct injection diesel engine, with a constant engine speed of 3000 rpm and four different engine loads ranging from 0.25 to 1 kW, with prepared fuel blends. Fuel consumption, exhaust emissions, exhaust and engine block temperatures were measured to make environmental pollution cost analysis. In these tests, it was found that the DF90P10B1 test fuel performs better results as compared to those of neat diesel fuel which is reference fuel and other test fuels in terms of environmental pollution cost analysis. Pyrolytic oil - biogas - diesel fuel mixtures in variable ratios, can be used as an alternative fuel instead of neat diesel in diesel engines without any engine modifications. (C) 2020 Karabuk University. Publishing services by Elsevier B.V.
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    AN EXPERIMENTAL INVESTIGATION OF BIOGAS PURIFICATION WITH GRANULATED SLAG UNDER DIFFERENT PRESSURES
    (Health & Environment Assoc, 2017) Karagoz, Mustafa; Tunc, Nuri; Ciftci, Burak; Deniz, Emrah
    Biogas, with its production and energy potential, is an important renewable energy source for the developing renewable energy market. Biogas is a type of fuel that is produced from the biochemical degradation of biomass. It has a density similar to oxygen and before the biogas can be used, it is necessary to remove the contaminant gas content. Biogas is a gas obtained by degradation of biological wastes in an anaerobic environment. The contaminants in the biogas can decrease the lower heating value of the fuel and also cause corrosion and rust in the equipment and components used. Therefore, before using biogas, it is necessary to remove contaminants in it. In this study, biogas has been produced from animal waste by co-fermentation method. In order to purify the produced biogas from the pollutant gases, the effect of granular slag (an iron steel plant waste) in H2S removal from the biogas, has been investigated experimentally for different pressures. Experiment results gave an average amount of biogas production of 1.6 m(3) / day and methane (CH4) content reaching up to 71%. At the end of the process, it was determined that the 278 ppm H2S value of the biogas measured before entering the purification tower with slag material was purified with a ratio of 31% and decreased to 192 ppm without significant loss of methane.