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A comparative analysis of the engine performance, exhaust emissions and combustion behaviors of a compression ignition engine fuelled with biodiesel/diesel/1-butanol (C4 alcohol) and biodiesel/diesel/n-pentanol (C5 alcohol) fuel blends
Scopus
Toplam 138 atıf DOI
In this study, engine performance, exhaust emissions and combustion behaviors of a single-cylinder, four-stroke, direct-injection diesel engine running on biodiesel/diesel/1-butanol and biodiesel/diesel/n-pentanol fuel blends were investigated and compared with diesel fuel under different engine speeds and full load operating conditions. Test fuels were prepared with 5 and 10 vol% 1-butanol and n-pentanol. Engine test results indicated that brake powers and torques decreased as the amount of alcohol increased, while BSFC increased between 0.77% and 8.07%. Alcohol blended fuels acquired lower EGT and CO2, while observing higher O2 emission due to high oxygen content of alcohol compared to diesel fuel. Alcohol treated blends also diminished NOX by 0.56–2.65%, CO by 6.90–32.40%, and smoke by 10.47–44.43%. Moreover, n-pentanol blended fuels showed better performance and emission results than 1-butanol blends. Maximum in-cylinder pressure of higher alcohol blended fuels found between 94.55 and 95.82 bar at 371-372oCA for 1400 rpm, and between 78.19 and 82.19 bar at 375-376oCA for 2600 rpm. Alcohol addition into the blends increased maximum in-cylinder pressure up to 1.38% at low speed, whereas it decreased up to 3.75% at high speed. Furthermore, higher HRR values up to 8.5% were observed with the alcohol mixed fuels. Consequently, higher alcohols (n-pentanol and 1-butanol) can be utilized as alternative additives in biodiesel/diesel blends for diesel engines to improve emissions, although they adversely influence engine performance.
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Determination of the Effects of Some Additives Added to the Mixture of Diesel and Safflower Biodiesel on Exhaust Emissions
Scopus
Havuzumuzda Open Access 1 atıf almış
In this study, linas, a newly developed variety of safflower plant, were used for biodiesel production. Fuel properties and exhaust emission values of biodiesel fuel (B100) and alternative blended fuels containing different volumetric amounts of diesel (M100), biodiesel (B100) and n-butanol (BU) or n-pentanol (P) (diesel/biodiesel/n-butanol and diesel/biodiesel/n-pentanol) were evaluated in comparison with the reference fuel diesel (M100). In addition, in the study, the effects of 2-ethylhexyl nitrate (EHN) on fuel properties and emission values have been examined by adding EHN cetane improver additive to mixture fuels at a concentration of 2000 ppm. Exhaust emission tests of all fuels and mixtures were carried out in a four-cylinder, four-stroke, and direct injection diesel engine at different speeds and full load conditions. According to the results of the research, the fuel properties of diesel, biodiesel, and blended fuels have been determined that comply with biodiesel and diesel fuel standards. Density values of these fuels were determined between 0.830 to 0.8885 kg m-3, kinematic viscosities 2.83 and 4.57 mm2s-1, calorific values 40.13 and 43.4 MJ kg-1, water content 48.015 and 499 ppm, cetane numbers 48.8 and 55.8, cloud point, cold filter plugging point, and pour point -13.9 and -1.4 ºC, -22 and -10 ºC, -15 and <-20 ºC, respectively. While CO, CO2, and NOx emissions of blended fuels show lower values compared to diesel fuel, it has been determined that there are certain rates of increases in HC and O2 emissions. It was determined that the high NOx emissions of biodiesel decreased with the addition of high alcohols to the blend fuels. In general, it has been determined that the fuel properties and emission results of blends containing pentanol show better results than fuels containing butanol. The 2-Ethylhexyl Nitrate additive used in the blend was effective in improving the emissions.
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Kurumlar (1)
Selçuk Üniversitesi
Selçuklu, Turkey