Effects of biodiesel on emissions of a bus diesel engine

Kegl, Breda

doi:10.1016/j.biortech.2007.01.021

Cited by 146 publications

(73 citation statements)

References 15 publications

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“…Additionally, the B10 fuel is an ethyl ester with internal oxygen atoms resulting in a faster burning of the impurities under the same conditions of use. This was also reported by Nabi et al [15] and Kegl [16]. Any fact concerning solubility parameters of benzene, raising the burning potential of impurities by B10 fuel, must also be considered.…”

Section: Analysis Of Btex Emissions From the Engine Burning Diesel Ansupporting

confidence: 66%

Analysis of the emissions of volatile organic compounds from the compression ignition engine fueled by diesel–biodiesel blend and diesel oil using gas chromatography

Ferreira

Santos

Souza

et al. 2008

Energy

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Section: Analysis Of Btex Emissions From the Engine Burning Diesel Ansupporting

confidence: 66%

Analysis of the emissions of volatile organic compounds from the compression ignition engine fueled by diesel–biodiesel blend and diesel oil using gas chromatography

Ferreira

Santos

Souza

et al. 2008

Energy

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“…It is a non-toxic substance; its combustion does not lead to green-house effect. As shown in studies on contemporary motor types (Altın et al, 2001;Kegl, 2008), biodiesel is a direct substituent for fossil diesel.…”

Section: Introductionmentioning

confidence: 99%

The effect of the acidity of rapeseed oil on its transesterification

Kwiecień

Hájek

Skopal

2009

Bioresource Technology

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SummaryThe aim of this work is to study the transesterification of vegetable oils with a high acid number. Rapeseed oil was used as the raw material and its acid number was changed by the adding of oleic acid (from 0.89 to 12.25 mg KOH/g). Methanol was used for transesterification (molar ratio of oil to methanol 1:6) and potassium hydroxide was used as a catalyst. After the reaction time, the residue of catalyst was neutralized by gaseous carbon dioxide and methanol excess was removed. After the separation of two phases, each of them was analyzed (in ester phase: yield, content of methylester and acid number; in glycerol phase: yield, density, viscosity, content of glycerol, soaps, methylester, potassium carbonate and hydrogen carbonate). The obtained data was compared with theoretical material balances and effect on saponification of oil was calculated. The results show that the yield of methylester (biodiesel) is significantly affected by higher acid number, as well as enhanced soap formation. On the other hand, the conversion of the oil and acid number of the ester phase remain at constant values in studied borders.

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“…Combustion efficiency remained constant using either biodiesel or diesel fuel (Dorado et al, 2003a). Biodiesel possesses several distinct advantages over petro-diesel regarding exhaust emissions (Kegl, 2008) Compared to mineral diesel, biodiesel generally causes a decrease of unburned HC, CO and PM emissions and an increase of NO x emission (Tat et al, 2007). The results indicate that, by using biodiesel, harmful emissions can be reduced to some extent by adjusting the injection pump timing properly (Kegl, 2006).…”

Section: Introductionmentioning

confidence: 99%

Optimum reaction time, performance and exhaust emissions of biodiesel produced by microwave irradiation

Refaat

Sheltawy

Sadek

2008

Int. J. Environ. Sci. Technol.

124

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While transesterification is well established, there remain considerable inefficiencies in existing transesterification processes. In this study an alternative energy stimulant, ''microwave irradiation'' was used for the production of the alternative energy source, biodiesel. The optimum parametric conditions obtained from the conventional technique were applied using microwave irradiation in order to compare both systems. The results showed that application of radio frequency microwave energy offers a fast, easy route to this valuable biofuel with advantages of enhancing the reaction rate and improving the separation process. The methodology allows for the use of high free fatty acid content feedstock, including used cooking oil; hence it helps to reduce the cost of production which constitutes a major hurdle towards widespread commercialization of biodiesel. The study also showed that the optimum reaction time for microwave-enhanced biodiesel production should be highly respected. Exceeding the optimum reaction time will lead to deterioration of both biodiesel yield and purity. This paper also reported the performance and exhaust emissions from a diesel engine when fuelled with a petroleum diesel fuel and two different biodiesel fuels; one obtained by the conventional technique and the other by microwave irradiation. It was concluded that microwave-enhanced biodiesel is not, at least, inferior to that produced by the conventional technique.

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Effects of biodiesel on emissions of a bus diesel engine

Cited by 146 publications

References 15 publications

Analysis of the emissions of volatile organic compounds from the compression ignition engine fueled by diesel–biodiesel blend and diesel oil using gas chromatography

Analysis of the emissions of volatile organic compounds from the compression ignition engine fueled by diesel–biodiesel blend and diesel oil using gas chromatography

The effect of the acidity of rapeseed oil on its transesterification

Optimum reaction time, performance and exhaust emissions of biodiesel produced by microwave irradiation

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