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Öğe Biyodizelin hava kirliliğine etkisi(Batman Üniversitesi, 2012-06-01) Aydın, Hüseyin; Aydın, Selman; İlkılıç, CumaliBu çalışmada aspir yağından transesterifikasyon (yağın yeniden esterleştirmesi) yöntemi ile biyodizel üretilmiştir. %20 aspir biyodizeli %80 dizel karışımlı yakıt ile normal dizel yakıtı (D2) tek silindirli, dört zamanlı, direkt püskürtmeli ve hava soğutmalı bir dizel motorunda kullanılarak egzoz emisyonları karşılaştırmalı olarak incelendi. Yakıtların test sonuçları karşılaştırıldığında aspir yağı metil esterinin dizel yakıtına göre NOx ve O2 emisyonlarında artış HC, CO2 ve CO emisyonlarında ise azalmalar görülmüştür. Motor emisyonlarında metil ester karışımı (B80) genel itibari ile çevre açısından daha az zararlı olduğu görülmüştür.Öğe Exhaust emissions from a spark-ıgnition engine operating on Iso-propanol and unleaded gasoline blends(Technology, 2010) Altun, Şehmus; Öner, Cengiz; Fırat, MüjdatIn this study, the effect of blends of iso-propanol and unleaded gasoline on exhaust emissions of a sparkignition engine were experimentally investigated. Exhaust emission tests were conducted on a four-stroke, four cylinder and direct injection spark-ignition engine. The engine tests were performed at three-fourth throttle opening position at four various speeds in the range of 1000-4000 rpm with 1000 rpm period. The experimental results compared with unleaded gasoline showed that emissions of carbon monoxide (CO) and hydrocarbon (HC) decreased with iso-propanol-unleaded gasoline blends while carbon dioxide (CO2) emission increased.Öğe Air pollution, pollutant emissions and harmfull effects(Batman Üniversitesi, 2017) Aydın, Hüseyin; İlkılıç, CumaliPresent paper is an overview of the engine and air pollution problem especially in the urban areas. Air pollution is caused bu pollutant emissions is popular problem that should be solved in the world by means of its harmfull effects. The combustion processes of diesel and gasoline fuels in realted engines and other hydrocarbon fuels in termical machines are main sources of air pollutant emissions. These main pollutants are nitrogen oxides (NOx), carbon dioxide (CO2), sulphur oxides (SOx), hydrocarbons (HC), carbon monoxide (CO), particulates matter (PM), lead (Pb), and volatile organic compounds (VOCs). All these emissions are firstly introduced and classified in the view of their sorces and formation processes. Then, their negative and harmfull effects on global warming, environment and human healt have been presented. Finaly the processes and technologies of reducing these pollutant emissions were presented.Öğe The performance and emissions characteristics of a diesel engine fueled with biodiesel and diesel fuel(Kırıkkale Üniversitesi, 2010-01) Altun, Şehmus; Öner, Cengiz; Sugözü, İlkerThis paper presents the performance and emission characteristics of a diesel engine fueled with biodiesel and diesel fuel. The tests were performed in a four stroke, single cylinder, naturally aspirated, air-cooled and direct injection diesel engine at the different engine speed under full-load conditions. The results obtained with biodiesel were compared with the diesel fuel as reference fuel. The engine torque and power obtained in biodiesel were less, and the specific fuel consumption was found to be higher, which could be attributed to lower calorific value of biodiesel. CO emissions for biodiesel were lower than that of diesel fuel. However, it was observed that NOx emissions for biodiesel were higher than that of diesel fuel.Öğe Biodiesel production from raw cottonseed oil and its performance in a diesel engine(Technology, 2011) Adin, Hamit; Yaşar, Fevzi; Öner, Cengiz; Altun, ŞehmusIn this experimental work, raw cottonseed oil was converted by KOH-catalyzed transesterification reaction with methyl alcohol to the cottonseed oil methyl ester (biodiesel) and then tested in a single cylinder, four strokes and direct injection diesel engine at the constant engine speed (2000 rpm) under different engine loads. The composition and the fuel-related properties of produced biodiesel were determined by using gas chromatography (GC) and related instruments. An increase in brake specific fuel consumption (BSFC) and decrease in brake thermal efficiency (BTE) for fuel blends were observed compared with diesel fuel. Compared with diesel fuel, exhaust emissions were found to be lower in carbon monoxide, hydrocarbon, nitrogen oxides and smoke with the use of fuel blends. It was concluded that cottonseed oil methyl esterdiesel fuel blends could be substituted for the diesel fuel without any modifications in diesel engines, with better environmental characteristics of fuel blends.Öğe Air pollution, pollutant emissions and harmfull effects(Batman Üniversitesi, 2017-12-31) Aydın, Hüseyin; İlkılıç, CumaliPresent paper is an overview of the engine and air pollution problem especially in the urban areas. Air pollution is caused bu pollutant emissions is popular problem that should be solved in the world by means of its harmfull effects. The combustion processes of diesel and gasoline fuels in realted engines and other hydrocarbon fuels in termical machines are main sources of air pollutant emissions. These main pollutants are nitrogen oxides (NOx), carbon dioxide (CO2), sulphur oxides (SOx), hydrocarbons (HC), carbon monoxide (CO), particulates matter (PM), lead (Pb), and volatile organic compounds (VOCs). All these emissions are firstly introduced and classified in the view of their sorces and formation processes. Then, their negative and harmfull effects on global warming, environment and human healt have been presented.
