Combustion analysis of microalgae methyl ester in a common rail direct injection diesel engine

Jahirul, M.I.; Rahman, M. F.; Heimann, Kirsten; Nabi, Nurun; Ristovski, Zoran; Dowell, Ashley; Thomas, George E.; Feng, Bo; Alvensleben, Nicolas von; Brown, Richard J.

doi:10.1016/j.fuel.2014.11.063

Cited by 134 publications

(41 citation statements)

References 45 publications

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“…The reduction in friction losses due to the better lubricity of the biodiesel has been reported in the literature [13,[21][22][23]. A recent study reported that the higher lubricity of biodiesel caused a reduction in friction losses in a diesel engine with common rail injection system [21].…”

Section: Friction and Mechanical Efficiencymentioning

confidence: 83%

“…For more information about triacetin and waste cooking biodiesel, the reader can refer to Ref. [10] and a recent publication from our research group [13].…”

Section: Fuel Selectionmentioning

confidence: 99%

“…The higher density, viscosity and surface tension of the oxygenated fuel compared to diesel lead to a larger droplet size with a higher spray penetration into the cylinder [13]. This can cause a higher fuel impingement of the biodiesel upon surfaces acting as a lubricant agent leading to improve the lubricity and reduce the friction losses in the cylinder.…”

Section: Friction and Mechanical Efficiencymentioning

confidence: 99%

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The effect of triacetin as a fuel additive to waste cooking biodiesel on engine performance and exhaust emissions

Zare

Nabi

Bodisco

et al. 2016

Fuel

Self Cite

114

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h i g h l i g h t sOxygen ratio was used instead of the equivalence ratio. Oxygen ratio decreases with engine load, but increases with engine speed. IMEP, BMEP, friction power, CO 2 , HC, PM and PN decreased with oxygenated fuels. BSFC, BTE and NOx increased with oxygenated fuels. Accumulation mode count median diameter decreased with oxygenated fuels. a b s t r a c tThis study investigates the effect of oxygenated fuels on engine performance and exhaust emission under a custom cycle using a fully instrumented 6-cylinder turbocharged diesel engine with a common rail injection system. A range of oxygenated fuels based on waste cooking biodiesel with triacetin as an oxygenated additive were studied. The oxygen ratio was used instead of the equivalence ratio, or air to fuel ratio, to better explain the phenomena observed during combustion. It was found that the increased oxygen ratio was associated with an increase in the friction mean effective pressure, brake specific fuel consumption, CO, HC and PN. On the other hand, mechanical efficiency, brake thermal efficiency, CO 2 , NOx and PM decreased with oxygen ratio. Increasing the oxygen content of the fuel was associated with a decrease in indicated power, brake power, indicated mean effective pressure, brake mean effective pressure, friction power, blow-by, CO 2 , CO (at higher loads), HC, PM and PN. On the other hand, the brake specific fuel consumption, brake thermal efficiency and NOx increased by using the oxygenated fuels. Also, by increasing the oxygen content, the accumulation mode count median diameter moved toward the smaller particle sizes. In addition to the oxygen content of fuel, the other physical and chemical properties of the fuels were used to interpret the behavior of the engine.

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Section: Friction and Mechanical Efficiencymentioning

confidence: 83%

“…For more information about triacetin and waste cooking biodiesel, the reader can refer to Ref. [10] and a recent publication from our research group [13].…”

Section: Fuel Selectionmentioning

confidence: 99%

Section: Friction and Mechanical Efficiencymentioning

confidence: 99%

See 1 more Smart Citation

The effect of triacetin as a fuel additive to waste cooking biodiesel on engine performance and exhaust emissions

Zare

Nabi

Bodisco

et al. 2016

Fuel

Self Cite

114

View full text Add to dashboard Cite

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“…Therefore, some estimates suggest that oil production from microalgae can be up to 200 times higher than the most efficiently produced vegetable oils. In order to address this knowledge gap, we conducted detailed particle emission measurements for a number of different blends of a microalgal biodiesel (engine performance analysis is reported in Islam et al 17 ). Recently, Makarevičiene et al 11 and others [12][13][14] investigated engine performance and emission characteristics using low blends of microalgae biodiesel (up to B30), but none of the studies conducted detailed particle emission measurements.…”

Section: Introductionmentioning

confidence: 99%

Particle emissions from microalgae biodiesel combustion and their relative oxidative potential

Rahman

Stevanović

Islam

et al. 2015

Environ. Sci.: Processes Impacts

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Microalgae are considered to be one of the most viable biodiesel feedstocks for the future due to their potential for providing economical, sustainable and cleaner alternatives to petroleum diesel. This study investigated the particle emissions from a commercially cultured microalgae and higher plant biodiesels at different blending ratios. With a high amount of long carbon chain lengths fatty acid methyl esters (C20 to C22), the microalgal biodiesel used had a vastly different average carbon chain length and level of unsaturation to conventional biodiesel, which significantly influenced particle emissions. Smaller blend percentages showed a larger reduction in particle emission than blend percentages of over 20%. This was due to the formation of a significant nucleation mode for the higher blends. In addition measurements of reactive oxygen species (ROS), showed that the oxidative potential of particles emitted from the microalgal biodiesel combustion were lower than that of regular diesel. Biodiesel oxygen content was less effective in suppressing particle emissions for biodiesels containing a high amount of polyunsaturated C20-C22 fatty acid methyl esters and generated significantly increased nucleation mode particle emissions. The observed increase in nucleation mode particle emission is postulated to be caused by very low volatility, high boiling point and high density, viscosity and surface tension of the microalgal biodiesel tested here. Therefore, in order to achieve similar PM (particulate matter) emission benefits for microalgal biodiesel likewise to conventional biodiesel, fatty acid methyl esters (FAMEs) with high amounts of polyunsaturated long-chain fatty acids (≥C20) may not be desirable in microalgal biodiesel composition.

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“…From the last decades, researchers have been trying to find out the biodiesel sources and already there are more than 350 oil-bearing crops that have been introduced to produce biodiesel [9,10]. The conventional biodiesel sources are palm, jatropha, coconut, sunflower, soybean, rapeseed, jojoba, neem, karanja, calophyllum, moringa, cotton, castor oil, and microalgae [11][12][13][14][15]. The feedstocks of biodiesel should be chosen from the sources that are locally available, easily accessible, and economically feasible and technically viable [16].…”

Section: Introductionmentioning

confidence: 99%

Prospects of Biodiesel Production from Macadamia Oil as an Alternative Fuel for Diesel Engines

et al. 2016

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This paper investigated the prospects of biodiesel production from macadamia oil as an alternative fuel for diesel engine. The biodiesel was produced using conventional transesterification process using the base catalyst (KOH). A multi-cylinder diesel engine was used to evaluate the performance and emission of 5% (B5) and 20% (B20) macadamia biodiesel fuel at different engine speeds and full load condition. It was found that the characteristics of biodiesel are within the limit of specified standards American Society for Testing and Materials (ASTM D6751) and comparable to diesel fuel. This study also found that the blending of macadamia biodiesel-diesel fuel significantly improves the fuel properties including viscosity, density (D), heating value and oxidation stability (OS). Engine performance results indicated that macadamia biodiesel fuel sample reduces brake power (BP) and increases brake-specific fuel consumption (BSFC) while emission results indicated that it reduces the average carbon monoxide (CO), hydrocarbons (HC) and particulate matter (PM) emissions except nitrogen oxides (NO x ) than diesel fuel. Finally, it can be concluded that macadamia oil can be a possible source for biodiesel production and up to 20% macadamia biodiesel can be used as a fuel in diesel engines without modifications.

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Combustion analysis of microalgae methyl ester in a common rail direct injection diesel engine

Cited by 134 publications

References 45 publications

The effect of triacetin as a fuel additive to waste cooking biodiesel on engine performance and exhaust emissions

The effect of triacetin as a fuel additive to waste cooking biodiesel on engine performance and exhaust emissions

Particle emissions from microalgae biodiesel combustion and their relative oxidative potential

Prospects of Biodiesel Production from Macadamia Oil as an Alternative Fuel for Diesel Engines

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