Transient Emissions Characteristics of a Turbocharged Engine Fuelled by Biodiesel Blends

Tian, Jianyi; Xu, Hongming; Ghafourian, A.; Dai, Li‐Xin; Tan, Crystal Tze Ying; Shuai, Shijin

doi:10.4271/2013-01-1302

Cited by 9 publications

(7 citation statements)

References 18 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…As mentioned previously in the introduction section, there are mixed conclusion about biodiesel NO x emissions in the literature. For example, some studies report increased NO x emissions of biodiesel compared to petroleum diesel [9,11,14,20,[25][26][27][28][29] while other studies suggest decreased NO x emissions [12,15,21,36]. The detailed study conducted in a heavy-duty optical diesel engine [31] suggested that the charge-gas mixture conditions at the flame base play a key role in determining the engine-out NO x emissions such that the biodiesel mixture being closer to stoichiometric can lead to increased local and average in-cylinder temperatures and thereby increasing thermal NO formation.…”

Section: Smoke and Oxides Of Nitrogen Emissionsmentioning

confidence: 99%

“…There are well known advantages of higher biodiesel blends in engine-out emissions. For example, many studies reported reduced smoke emissions with the increasing biodiesel blending ratio [8][9][10][11][12][13][14][15][16]. This is because biodiesel is an oxygenated fuel with a reduced amount of carbon compared to petroleum diesel.…”

Section: Introductionmentioning

confidence: 99%

“…This means higher brake specific fuel consumption (BSFC) for higher blending ratio biodiesel fuels, which is a disadvantage of using biodiesel in diesel engines [8-11, 20, 23-25]. Another issue is the increased engine-out emissions of the oxides of nitrogen (NO x ) for higher biodiesel blends [9,11,14,20,[25][26][27][28][29][30].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Dependency of engine combustion on blending ratio variations of lipase-catalysed coconut oil biodiesel and petroleum diesel

Woo

Kook

Hawkes

et al. 2016

Fuel

View full text Add to dashboard Cite

From our previous study about coconut oil-based biodiesel blended with petroleum diesel at a ratio of 1:9 (B10), it was found that the lipase catalysed ethyl ester B10 can achieve not only simultaneous reduction of smoke and NO x emissions but also improved brake power compared to petroleum diesel. This paper presents engine performance of this biodiesel fuel at higher blending ratios with the expectation of further improved emissions and brake power. The experiments were performed in a single-cylinder light-duty diesel engine equipped with a common-rail injection system. Prior to the engine performance and emissions testing, the fuel injection rate measurement was conducted for various biodiesel blending ratios to find the injected fuel mass for the same total energy of 1080 J, considering 6% lower calorific value of the tested biodiesel than that of petroleum diesel. The engine experiments were performed at fixed engine speed of 2000 rpm and common-rail pressure of 130 MPa. In addition to the variations of biodiesel blending ratio, the injection timing was also swept from 13 to 3 crank angle degrees before top dead centre to evaluate combustion of biodiesel blends at various combustion phasing conditions. The in-cylinder pressure traces were measured using a piezo-electric pressure transducer, which was used to calculate key performance parameters such as the indicated mean effective pressure (IMEP), apparent heat release rate (aHRR), and burn duration. The brake MEP (BMEP) was also calculated using the measured brake torque from the eddy current (EC) dynamometer and subsequently the friction MEP (FMEP) was obtained. From the engine tests, it is found that a higher biodiesel blending ratio results in decreased IMEP because the lower calorific value of coconut oil-based biodiesel and overall leaner mixture condition cause the decreased diffusion flame temperature and extended burn duration. The improved lubricity of coconut oil biodiesel and hence reduced friction loses, however, leads to similar BMEP of petroleum diesel even for high biodiesel blends. Nevertheless, a significant increase in the brake specific fuel consumption is unavoidable at high biodiesel blending ratios. From the engine-out emission measurements, a significant reduction of smoke emissions were observed with an increase in the biodiesel blending ratio, which is explained by the oxygenated molecular structures and reduced aromatics contents of biodiesel. Also, the slower reaction and leaner mixture of high biodiesel blends, together with shorter carbon chain length of coconut oil-based biodiesel, cause the reduced flame temperature and thereby decreasing NO x emissions. Therefore, the high biodiesel blends using coconut oil feed stock is very promising to overcome the smoke-NO x trade-off of petroleum diesel. When both the brake specific fuel consumption and smoke/NO x emissions are considered, however, the optimised biodiesel blending ratio of the tested conditions of this study is found at low B10.

show abstract

Section: Smoke and Oxides Of Nitrogen Emissionsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Dependency of engine combustion on blending ratio variations of lipase-catalysed coconut oil biodiesel and petroleum diesel

Woo

Kook

Hawkes

et al. 2016

Fuel

View full text Add to dashboard Cite

show abstract

“…The incomplete combustion of the fuel during cold-start operation results in higher emissions compared to hot-start of the engine. This is due to the low temperature which results in delayed atomisation of fuel which increases the number of misfiring cycles during the coldstart operation [6]. Furthermore, the combustion products are more readily produced during transient operation of the engine compared to steady state operation.…”

Section: Introductionmentioning

confidence: 99%

Structural characterisation of soot particles for cold-start and hot-start operation of a diesel engine

Arora¹,

Lodi²,

Verma³

et al. 2020

Australasian Fluid Mechanics Conference (AFMC)

View full text Add to dashboard Cite

The current study investigates the morphology and nanostructure of soot particles during cold and hot-start operation of a custom designed drive cycle for a heavy-duty diesel engine. The drive cycle consists of eight repeated sets of 120 seconds each, with abrupt change in the load at 30 second intervals at a constant engine speed (1500 and 2000 rpm). After each segment there is an engine stop period of 60 seconds. Soot samples were collected on TEM grids for the first three consecutive sets (cold-start) and the last three consecutive sets (hot-start). The soot samples were analysed using transmission electron microscope. An in-house automated image processing methodology was used for the quantification of a range of characterisation parameters. The results show that the primary particle size during cold-start is smaller in comparison with hotstart operation. High fractal dimension of soot aggregate for cold-start operation would mean more compact structure of soot particles. Shorter fringes with a higher fringe separation distance for cold-start would mean lower graphitisation of soot particles.

show abstract

“…Biodiesel contains certain amount of oxygen but little sulfur, nitrogen, and aromatics. So much less smoke, sulfur‐derived particulate matter (PM), and other emissions will form when a diesel engine is fueled with biodiesel instead of diesel fuel as proved in many studies . For several years, more and more researches have been made to exploit new biodiesel varieties derived from waste cooking oil, rapeseed oil, soybean oil, sunflower oil, peanut oil, jatropha curcas oil , moringa oleifera oil , castor oil , macroalgae , microalgae , and so on.…”

Section: Introductionmentioning

confidence: 99%

Research on ethylene glycol monomethyl ether palm oil monoester as a novel biofuel

Guo

Liu

Wang

et al. 2015

Env Prog and Sustain Energy

View full text Add to dashboard Cite

In the article, a new biofuel named ethylene glycol monomethyl ether palm oil monoester (EGMMEPOM) is developed as a clean alternative fuel for diesel engine. It was synthesized through transesterification reaction with a refined palm oil and ethylene glycol monomethyl ether (EGMME) as reactants and potassium hydroxide (KOH) as catalyst under certain conditions. Its chemical structure was identified through Fourier transform‐infrared (FT‐IR) spectrum, 1H nuclear magnetic resonance (1H NMR) spectroscopy, and gel permeation chromatography (GPC) analyses, and its main fuel properties were measured precisely. A two‐cylinder diesel engine was utilized to investigate its combustion performances, fuel economy and emissions characteristics. When the engine was operated with the new biofuel at a high speed of 2000 r/min instead of diesel fuel, smoke emissions were decreased by 26.3% to 70.0% with carbon monoxide (CO) and hydrocarbon compounds (HC) emissions significantly reduced. Nitrogen oxides (NOx) emissions were decreased by 14.0% to 23.5%. The new palm oil monoester has a cetane number as high as 77.0 which leads to a shorter autoignition delay duration than diesel fuel and makes the curves of in‐cylinder pressure increasing rate and heat release rate shift forward 2 to 3 degrees crank angle (°CA). Owing to more amount of oxygen existing in the new biofuel, both peak in‐cylinder pressure increasing rate and peak heat releasing rate decreased. © 2015 American Institute of Chemical Engineers Environ Prog, 35: 241–249, 2016

show abstract

Transient Emissions Characteristics of a Turbocharged Engine Fuelled by Biodiesel Blends

Cited by 9 publications

References 18 publications

Dependency of engine combustion on blending ratio variations of lipase-catalysed coconut oil biodiesel and petroleum diesel

Dependency of engine combustion on blending ratio variations of lipase-catalysed coconut oil biodiesel and petroleum diesel

Structural characterisation of soot particles for cold-start and hot-start operation of a diesel engine

Research on ethylene glycol monomethyl ether palm oil monoester as a novel biofuel

Contact Info

Product

Resources

About