Effect of biodiesel-diesel-n-pentanol and biodiesel-diesel-n-hexanol blends on diesel engine emission and combustion characteristics

Babu, D.; Anand, R.

doi:10.1016/j.energy.2017.05.103

Cited by 169 publications

(45 citation statements)

References 36 publications

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“…The addition of n-pentanol to high concentrations of WCO biodiesel (85 and 90%)/diesel (5%) blends leads to an increase of cylinder gas pressure and ignition delay and a decrease of combustion duration (Babu and Anand, 2017). The lower CN of n-pentanol prolonged the ignition delay time, and the higher ignition delay allows more combustible mixture being prepared with the delay period, which results in a higher cylinder gas pressure.…”

Section: Ternary Blendsmentioning

confidence: 99%

Utilization of Pentanol as Biofuels in Compression Ignition Engines

2020

Front. Mech. Eng.

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Of several higher alcohols such as pentanol, hexanol, octanol, decanol, dodecanol, phytol, and fusel oil, pentanol isomers have recently received remarkable attention as alternative fuels for diesel engines because they emit less greenhouse gases and harmful pollutants. Because of great potential as a blending component and physicochemical properties of pentanol, binary blends such as diesel/pentanol and biodiesel/pentanol and ternary blends such as diesel/biodiesel/pentanol were mainly studied in the conventional diesel engine. Quaternary blends of diesel, biodiesel, straight vegetable oil, and pentanol were also investigated. Very few information related to the application of pentanol to advanced compression ignition (CI) engine is available in the literature. The diesel/pentanol blends coupled with exhaust gas recirculation (EGR) technology could simultaneously reduce NOx and soot emissions from CI engine. Further, diesel/pentanol blends generally produced higher CO and hydrocarbon (HC) emissions than did diesel fuel. However, CO and HC emissions were significantly reduced by mixing the cetane improver with the blends. Up to 45-50% n-pentanol/diesel blends can be safely used in diesel engines without any engine modification or any additive. However, in terms of kinematic viscosity, lubricity, and oxidation stability of diesel/pentanol blends, the use of pentanol should be limited to concentrations below 10%. Generally, in the studies of biodiesel/pentanol blends in CI engines, the reduction of CO, HC, NOx, and smoke emissions was observed compared to neat biodiesel. For ternary blends, diesel/biodiesel/pentanol blends were mainly investigated by the researchers. The emission characteristics in terms of CO, HC, NOx, and smoke opacity showed the different trends according to the pentanol proportion in the ternary blends, particularly <10% or more than 10%. To increase the biofuels in the CI engine, more studies for the quaternary blends of pentanol are required.

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Section: Ternary Blendsmentioning

confidence: 99%

Utilization of Pentanol as Biofuels in Compression Ignition Engines

2020

Front. Mech. Eng.

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“…The percentage of variations in carbon monoxide emissions with engine loads when testing the use of diesel-fuel biodiesel is as shown in Figure 4. The mixture of air-rich biodieseldiesel fuel can produce CO because of the unavailable oxygen that can promote CO concentration for fuel [29], [30]. The lower emissions from the use of biodiesel-diesel fuel rather than pure diesel for the entire load spectrum of the engine due to the oxygen present in biodiesel, so that fuel use can support full combustion in the cylinder chamber.…”

Section: Thermal Efficiencymentioning

confidence: 99%

Effects of Diesel-Biodiesel Blends in Diesel Engine Single Cylinder on the Emission Characteristic

et al. 2018

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Biodiesel is an alternative fuel that is used in a diesel engine as a substitute for diesel fuel. However, using biodiesel without a modified engine can cause higher NOx emissions. Therefore, to reduce harmful emissions some strategy must be proposed or or a change in the injection is performed. In this study, injection schemes and engine performance injection time, emissions and firing characteristics of biodiesel mixing results in engines were investigated by using GT-POWER simulation. The simulations in this study were conducted on diesel engines to observe the accuracy in experimental results . The engines were tested at speeds of 1100 rpm, 1300 rpm, and 1500 rpm by using a biodiesel-diesel fuel mixture. The simulation results showed that NOx emissions were found to drop below 100 ppm when biodiesel fuel was used for all performed operations. Meanwhile CO emissions were also decreased by 10%-15% when biodiesel fuel was used, and the thermal efficiency level increased by 2% and 3.5% as compared to pure diesel. The ratio of NOx reduction rates of biodiesel and diesel was 11%-14% as compared to 9.5% with pure diesel. Based on the simulation result, it was shown that the accuracy level of simulation data with experiment was 97%. So this result can be the future testing standard and simulation by using GT-POWER could also be used especially for the automotive industry.

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“…Therefore, mathematical correlations (regression models) would be useful to obtain them at several temperatures without need to measurements all the time. However (a) even though there are numerous studies on presenting density data and regression models (linear, quadratic, and so on) or prediction methods (Rackett‐Yamada, Rackett‐Soave, Rackett‐Yuan, group contribution, and so on) for pure biodiesels or biodiesel–diesel binary blends in wide ranges of temperatures, the detailed studies addressing experimental density data and new regression models for biodiesel–diesel–alcohol ternary blends which have been recently used in diesel engines to improve engine performance and exhaust emissions (NO x ‐smoke trade off), are still scarce. (b) The prediction methods (Rackett‐Yamada, and so on), generally depending on the chemical properties of pure methyl or ethyl esters (fatty acid composition, molecular weight, group parameters, compressibility factor, critical temperature, pseudo critical temperature, acentric factor, saturation vapor pressure, and so on) to estimate densities of pure biodiesels or biodiesel–diesel binary blends, cannot be practical as regression models since it may difficult to experimentally determine the chemical properties of each biodiesel.…”

Section: Introductionmentioning

confidence: 99%

Measurement and estimation of densities of different biodiesel–diesel–alcohol ternary blends

Gülüm

Onay

Bilgin

2019

Env Prog and Sustain Energy

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Density is one of the most important fuel properties influencing the injection, spray, and combustion characteristics. Since a number of articles have recently been performed investigating the effects of biodiesel–diesel–alcohol ternary blends on combustion characteristics and exhaust emissions, the reliable density data and regression models for the ternary blends become more important in developing accurate spray, combustion and emission models. However, there is lack of studies which focus on (a) the measurement of densities of ternary blends including higher alcohols over wide alcohol blending ratio at different temperatures, (b) development of one‐dimensional regression models to predict densities of ternary blends, and (c) comparison of predictive capabilities of models with artificial neural networks (ANNs). Therefore, in this article, to eliminate the lack of such studies in the existing literature, waste cooking oil biodiesel was produced, and it was mixed with diesel fuel and several alcohols to prepare ternary blends. The density measurements of ternary blends were performed under various temperatures (278.15 K−368.15 K). The exponential equation which can be used in spray or combustion model was derived by fitting the density data. The predictive capability of the exponential model was compared with the linear model and ANN using different density data of ternary blends to determine the best‐fit correlation. According to results, ANN is the most suitable one to estimate density; however, the exponential model is also thought to be an alternative to ANN.

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Effect of biodiesel-diesel-n-pentanol and biodiesel-diesel-n-hexanol blends on diesel engine emission and combustion characteristics

Cited by 169 publications

References 36 publications

Utilization of Pentanol as Biofuels in Compression Ignition Engines

Utilization of Pentanol as Biofuels in Compression Ignition Engines

Effects of Diesel-Biodiesel Blends in Diesel Engine Single Cylinder on the Emission Characteristic

Measurement and estimation of densities of different biodiesel–diesel–alcohol ternary blends

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