Preface to the First Edition

Knothe, Gerhard; Krahl, Jürgen; Gerpen, Jon Van

doi:10.1016/b978-1-893997-62-2.50004-8

Cited by 195 publications

(327 citation statements)

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“…The vis cosi ty of biodiesel is roughly one order of magnitude lower than the parent oil (Knothe et al, 2004). Biodie sel has a higher viscosity than petroleum diesel as refl ected in the relevant standards, which are 3.5-5.0 mm 2 / s according to EN 14214 and 1.9-4.1 mm 2 / s according to EN 590, respectively .…”

Section: Resultsmentioning

confidence: 99%

Differences in rheological profile of regular diesel and bio-diesel fuel

Čupera

Sedlák

Karafiát

2014

Acta Univ. Agric. Silvic. Mendelianae Brun.

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AbstractČUPERA, J., SEDLÁK, P., KARAFIÁT, P.: Diff erences in rheological profi le of regular diesel and bio-diesel fuel. Acta univ. agric. et silvic. Mendel. Brun., 2010, LVIII, No. 5, pp. 67-74 Biodiesel represents a promising alternative to regular fossil diesel. Fuel viscosity markedly infl uences injection, spraying and combustion, viscosity is thus critical factor to be evaluated and monitored. This work is focused on quantifying the diff erences in temperature dependent kinematic viscosity regular diesel fuel and B30 biodiesel fuel. The samples were assumed to be Newtonian fl uids. Vis cosi ty was measured on a digital rotary viscometer in a range of 0 to 80 °C. More signifi cant diff erence between minimum and maximum values was found in case of diesel fuel in comparison with biodiesel fuel. Temperature dependence of both fuels was modeled using several mathematical modelspolynomial, power and Gaussian equation. The Gaussian fi t off ers the best match between experimental and computed data. Description of viscosity behavior of fuels is critically important, e.g. when considering or calculating running effi ciency and performance of combustion engines. The models proposed in this work may be used as a tool for precise prediction of rheological behavior of dieseltype fuels. diesel fuel, biodiesel, kinematic viscosity, modeling Diesel fuel viscosity has a signifi cant impact on how well fuel (either regular or biodiesel) burns. As viscosity increases, fuel molecules cluster together. The molecules on the outside of the cluster mix well with oxygen during combustion and burn well. The molecules on the inside of the cluster do not mix as well and do not burn completely. Knowledge of fuel viscosity is important for several reasons, as it determines the temperature for handling, the size of the centrifuges and the temperature at which the fuel is injected into the engine. It is well known that as the temperature of the fuel is increased, the viscosity is reduced, but diff erences between individual blends or e.g. regular and biodiesel can be expected. Some fuel suppliers publish temperature/viscosity charts which are based on the average data of a large number of samples. However, estimations from the charts cannot be regarded as precise since the exact relationship depends on the source and composition of the fuel. The viscosity usually quoted is the kinematic viscosity expressed in centiStokes (cSt) at some reference temperature. Although ISO 8217 has a reference temperature of 100 °C, it is anticipated that this will be changed to 50 °C at the next revision. This is a value widely used throughout the industry. A few extra degrees of preheating can o en make a fuel suitable for injection equipment. Because of the viscosity/temperature relationship, a few degrees change could make a big diff erence to the injection viscosity. In practical terms, this means that if the actual fuel viscosity is greater than that ordered, it is likely that the fuel heater can accommodate this.Biodiesel refers to a vegetable o...

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Section: Resultsmentioning

confidence: 99%

Differences in rheological profile of regular diesel and bio-diesel fuel

Čupera

Sedlák

Karafiát

2014

Acta Univ. Agric. Silvic. Mendelianae Brun.

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“…Predominantly monounsaturated oils are the most suitable for biodiesel synthesis (Knothe et al, 2005). The biodiesel produced from microalgal sludge has the following fuel properties: an ester content of 99 %, a cetane number of 55, an iodine value of 73.5 gl 2 100 g −1 , a degree of unsaturation of ∼75 %, and a cold filter plugging point of 5 ºC (Table 3).…”

Section: Resultsmentioning

confidence: 99%

Treatment of cattle-slaughterhouse wastewater and the reuse of sludge for biodiesel production by microalgal heterotrophic bioreactors

Maroneze

Barin

Menezes

et al. 2014

Sci. agric. (Piracicaba, Braz.)

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“…In addition, biodiesel is biodegradable, due to the action of microorganisms, which favor a lower oxidative stability, thus reducing the useful life of the fuel. Therefore, the more moisture in the fuel, the greater the chances that microorganisms will develop and, consequently, contribute to corrosive actions on the substrate 19 .…”

Section: Influence Of Microorganisms and Corrosivity Of Water On Corrmentioning

confidence: 99%

Biocorrosion on Surface of ASTM A283 Carbon Steel, Exposed in Diesel S10 and Tap Water

et al. 2018

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This paper sets out to evaluate the corrosion and biocorrosion of carbon steel ASTM A283 exposed to a Diesel S10 oil/tap water system under static conditions for 90 days. The following analyzes were performed: physico-chemical in tap water, sulfur content in Diesel S10 and quantification of sessile microorganisms in the biofilm formed on the metal. To monitor the corrosion process, mass loss, scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS), confocal laser microscopy and X-ray diffraction (XRD) were performed. There were changes in the composition of the medium, correlated with the formation of corrosion and biofilm products. There was biodegradation of the fuel, which in contact with water influenced the development of microorganisms. Moreover, the corrosion rate was classified as moderate, the main form of corrosion being seen to be local alveolar corrosion. Therefore, the results revealed that water in diesel oil can be an aggravating factor in the process of corrosion and biocorrosion.

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Preface to the First Edition

Cited by 195 publications

References 0 publications

Differences in rheological profile of regular diesel and bio-diesel fuel

Differences in rheological profile of regular diesel and bio-diesel fuel

Treatment of cattle-slaughterhouse wastewater and the reuse of sludge for biodiesel production by microalgal heterotrophic bioreactors

Biocorrosion on Surface of ASTM A283 Carbon Steel, Exposed in Diesel S10 and Tap Water

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