The kinematic viscosity of biodiesel and its blends with diesel fuel

Tat, Mustafa Ertunc; Gerpen, Jon H. Van

doi:10.1007/s11746-999-0194-0

Cited by 226 publications

(119 citation statements)

References 7 publications

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“…This ratio increases especially when the temperature is below 25 o C [11]. Blending of the biodiesel with diesel and preheating of the biodiesel improves the viscous characteristics significantly [5,12,13]. The viscosity of biodiesel can be estimated from well known mixing laws such as the Grun-Nissan and Katti-Chaudhri laws, which were originally proposed by Arrhenis [14].…”

Section: Viscosity Of Biodieselmentioning

confidence: 99%

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Prediction models for density and viscosity of biodiesel and their effects on fuel supply system in CI engines

Tesfa¹,

Mishra²,

Gu³

et al. 2010

Renewable Energy

194

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Biodiesel is a promising non-toxic and biodegradable alternative fuel used in the transport sector. Nevertheless, the higher viscosity and density of biodiesel poses some acute problems when it is used it in unmodified engine. Taking this into consideration, this study has been focused towards two objectives. The first objective is to identify the effect of temperature on density and viscosity for a variety of biodiesels and also to develop a correlation between density and viscosity for these biodiesels. The second objective is to investigate and quantify the effects of density and viscosity of the biodiesels and their blends on various components of the engine fuel supply system such as fuel pump, fuel filters and fuel injector. To achieve first objective density and viscosity of rapeseed oil biodiesel, corn oil biodiesel and waste oil biodiesel blends (0B, 5B, 10B, 20B, 50B, 75B, and 100B) were tested at different temperatures using EN ISO 3675:1998 and EN ISO 3104:1996 standards. For both density and viscosity new correlations were developed and compared with published literature. A new correlation between biodiesel density and biodiesel viscosity was also developed. The second objective was achieved by using analytical models showing the effects of density and viscosity on the performance of fuel supply system. These effects were quantified over a wide range of engine operating conditions. It can be seen that the higher density and viscosity of biodiesel have a significant impact on the performance of fuel pumps and fuel filters as well as on air-fuel mixing behaviour of compression ignition (CI) engine.

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Section: Viscosity Of Biodieselmentioning

confidence: 99%

“…Equation (14) is the basic charctersitic equation for filtration. By assuming constant pressure difference ( ∆P), equation (15) can be modified to equation (16). Further, Γ , v and A are assumed constants and taking the fuel filter specific properties described in Table 2, equation (17) was developed.…”

Section: Mathematical Models Of Fuel Supply Systemmentioning

confidence: 99%

Prediction models for density and viscosity of biodiesel and their effects on fuel supply system in CI engines

Tesfa¹,

Mishra²,

Gu³

et al. 2010

Renewable Energy

194

View full text Add to dashboard Cite

show abstract

“…The majority of research has been carried out on blending several types of biodiesel [9][10][11], with conventional diesel. Fewer studies have dealt with alternative fuels from other feedstock.…”

Section: Fuel Blendingmentioning

confidence: 99%

“…Extensive research has been carried out on the properties of alternative fuels and blends with petroleum diesel [3,9,[11][12][13][14][15][16].…”

Section: Blending -Propertiesmentioning

confidence: 99%

The Evaluation of Flash Point and Cold Filter Plugging Point with Blends of Diesel and Cyn-Diesel Pyrolysis Fuel for Automotive Engines

Murphy

Devlin²,

McDonnell³

2013

TOEFJ

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Abstract:The production of synthetic fuels from alternative sources has increased in recent years as a cleaner, more sustainable source of transport fuel is now required. The European Commission has outlined renewable energy targets pertaining to transport fuel which must be met by 2020. In response to these targets Ireland has committed, through the Biofuels Obligation Scheme of 2008, to producing 3% of transport fuels from biofuels by 2010 and 10% by 2020. In order to be suitable for sale in Europe, diesel fuels and biodiesels must meet certain European fuel specifications outlined in the EN 590:2009 standard. The aim of this paper was to prepare blends of varying proportions of synthetic diesel (Cyn-diesel) fuel, produced from the pyrolysis of plastic, vs regular fossil diesel. The flash point (°C) and cold filter plugging point (°C) of these blends as well as of the conventional petroleum diesel fuel were analysed in relation to compliance with the European fuel standard EN 590. The results confirmed that blending of Cyn-diesel with conventional petroleum diesel has a highly significant effect on the properties of the resulting fuel blend. The results show that by increasing the Cyn-diesel content of the blend, the flash point of the blend decreases and the cold filter plugging point increases. Furthermore, comparing the fuel blends to EN 590 specifications has highlighted significant trends. The cold filter plugging points of all of the fuel blends are in compliance with EN 590 specifications. However, only blends of up to, and including, 40% Cyn-diesel are in compliance with EN 590 specifications for flash point. This analysis shows that a blend of 40% Cyndiesel is in compliance with all of the EN 590 specifications examined, and as such could be placed on the European fuel market (provided that the blend meets the requirements for the other properties in the EN 590 specification). This finding highlights the potential for Cyn-diesel blends to be incorporated into the European and national renewable energy targets.

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“…Viscosity is an important factor that affects the atomization process of the fuel in the combustion [4]. High viscosity was reported to reduce the fuel flow rate, which makes the engine starve for fuel under certain operating conditions, especially at low temperatures [5]. Transesterification is the most common method used to reduce oil viscosity.…”

Section: Introductionmentioning

confidence: 99%

Combustion of Microalgae Oil and Ethanol Blended with Diesel Fuel

Al-lwayzy

Yusaf

2015

Energies

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Abstract:Using renewable oxygenated fuels such as ethanol is a proposed method to reduce diesel engine emission. Ethanol has lower density, viscosity, cetane number and calorific value than petroleum diesel (PD). Microalgae oil is renewable, environmentally friendly and has the potential to replace PD. In this paper, microalgae oil (10%) and ethanol (10%) have been mixed and added to (80%) diesel fuel as a renewable source of oxygenated fuel. The mixture of microalgae oil, ethanol and petroleum diesel (MOE20%) has been found to be homogenous and stable without using surfactant. The presence of microalgae oil improved the ethanol fuel demerits such as low density and viscosity. The transesterification process was not required for oil viscosity reduction due to the presence of ethanol. The MOE20% fuel has been tested in a variable compression ratio diesel engine at different speed. The engine test results with MOE20% showed a very comparable engine performance of in-cylinder pressure, brake power, torque and brake specific fuel consumption (BSFC) to that of PD. The NO x emission and HC have been improved while CO and CO 2 were found to be lower than those from PD at low engine speed.

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The kinematic viscosity of biodiesel and its blends with diesel fuel

Cited by 226 publications

References 7 publications

Prediction models for density and viscosity of biodiesel and their effects on fuel supply system in CI engines

Prediction models for density and viscosity of biodiesel and their effects on fuel supply system in CI engines

The Evaluation of Flash Point and Cold Filter Plugging Point with Blends of Diesel and Cyn-Diesel Pyrolysis Fuel for Automotive Engines

Combustion of Microalgae Oil and Ethanol Blended with Diesel Fuel

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