Comparison of emissions of a direct injection diesel engine operating on biodiesel with emulsified and fumigated methanol

Cheng, C. H.; Cheung, Chun Shun; Chan, Tat Leung; Lee, Shuncheng; Yao, Chunde; Tsang, K.S.

doi:10.1016/j.fuel.2008.01.002

Cited by 238 publications

(90 citation statements)

References 36 publications

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“…Zhu et al (2010) also concluded from their experimental investigations with different blends of diesel, biodiesel and alcohols (both ethanol and methanol) that in order to obtain the same amount of energy output the fuel consumption is more for any blended fuel than neat diesel. Similar results were also reported by Cheng et al (2008) from their experimental study using blends of waste cooking oil biodiesel and methanol with diesel. Zhu et al (2011) repeated the experiments with ethanol instead of methanol and reported similar results to the present numerical work.…”

Section: Brake Specific Fuel Consumptionsupporting

confidence: 90%

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A numerical study on the performance, combustion and emission parameters of a compression ignition engine fuelled with diesel, palm stearin biodiesel and alcohol blends

Datta

Mandal

2016

Clean Techn Environ Policy

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A numerical simulation has been carried out in this study to evaluate the effect of alcohol addition to the blends of diesel and palm stearin biodiesel on the performance, combustion and emission of a diesel engine. The commercial software Diesel-RK has been used in this study to simulate a single-cylinder, naturally aspirated, direct injection, four-stroke diesel engine. The simulated results have been validated against experimental observation for the base fuel diesel. The effects of two alcohols, namely ethanol and methanol have been separately investigated and compared. The results indicate that although the brakespecific fuel consumption is slightly increased, the other performance characteristics and the entire combustion and emission parameters are improved with alcohol addition to diesel-biodiesel blends. The instantaneous heat release rate, ignition delay and oxides of nitrogen emission are found to be more with methanol than with ethanol. The diesel-biodiesel blend also shows better combustion and emission characteristics than that of diesel except oxides of nitrogen emission. Abbreviation CI Compression ignition CO 2 Carbon dioxide NO x Oxides of nitrogen PM Particulate matter BE20 A blend of 20 % ethanol and 80 % methyl soyate (by volume) HC Hydrocarbon THC Total hydrocarbon CO Carbon monoxide LHV Lower heating value SO x Oxides of sulphur bTDC Before top dead centre PSME Palm stearin methyl ester DP15 A blend of 15 % palm stearin methyl ester and 85 % diesel DPSE15 A blend of 15 % palm stearin methyl ester, 15 % ethanol and 70 % diesel DPSM15 A blend of 15 % palm stearin methyl ester, 15 % methanol and 70 % diesel List of symbols _ m j Mass flow rate of the jth species (kg/sec) m The total mass within the control cylinder (kg) m i Mass of the ith species (kg/sec) Y j i Stoichiometric coefficients on the product side Y cyl i Stoichiometric coefficients on the reactant side _ S gen Net generation rate of the ith species (kg/sec) X i Molar Rate of Production (mol/sec) W mw Molecular weight (kg/mol) v Specific volume (m 3 /kg) q Density (kg/m 3 ) _ m a Air mass flow rate into the engine (kg/sec) _ m f Fuel mass flow rate into the engine (kg/sec) x Angular crank velocity (rpm) m a Engine intake air flow rate (kg/sec) s Time (sec) n Engine speed (rpm)

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Section: Brake Specific Fuel Consumptionsupporting

confidence: 90%

“…From the economic point of view, methanol can be used as supplementary fuel for diesel engine with biodiesel (Cheng et al 2008;Huang et al 2004a). The higher oxygen fraction of methanol enhances the combustion process.…”

Section: Introductionmentioning

confidence: 99%

A numerical study on the performance, combustion and emission parameters of a compression ignition engine fuelled with diesel, palm stearin biodiesel and alcohol blends

Datta

Mandal

2016

Clean Techn Environ Policy

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“…In general, if the fuel properties of biodiesel are compared to petroleum diesel fuel, biodiesel has a higher viscosity, density, and cetane number. Moreover, it has been reported that biodiesel can reduce tailpipe emissions because it has a sufficient amount of oxygen in its molecular structure [16][17][18][19]. However, biodiesel must be blended with pure diesel because the net calorific value of biodiesel is less than that of conventional diesel fuel.…”

Section: Introductionmentioning

confidence: 99%

Effects of Canola Oil Biodiesel Fuel Blends on Combustion, Performance, and Emissions Reduction in a Common Rail Diesel Engine

Yoon¹,

Kim

et al. 2014

Energies

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Abstract:In this study, we investigated the effects of canola oil biodiesel (BD) to improve combustion and exhaust emissions in a common rail direct injection (DI) diesel engine using BD fuel blended with diesel. Experiments were conducted with BD blend amounts of 10%, 20%, and 30% on a volume basis under various engine speeds. As the BD blend ratio increased, the combustion pressure and indicated mean effective pressure (IMEP) decreased slightly at the low engine speed of 1500 rpm, while they increased at the middle engine speed of 2500 rpm. The brake specific fuel consumption (BSFC) increased at all engine speeds while the carbon monoxide (CO) and particulate matter (PM) emissions were considerably reduced. On the other hand, the nitrogen oxide (NOx) emissions only increased slightly. When increasing the BD blend ratio at an engine speed of 2000 rpm with exhaust gas recirculation (EGR) rates of 0%, 10%, 20%, and 30%, the combustion pressure and IMEP tended to decrease. The CO and PM emissions decreased in proportion to the BD blend ratio. Also, the NOx emissions decreased considerably as the EGR rate increased whereas the BD blend ratio only slightly influenced the NOx emissions. OPEN ACCESSEnergies 2014, 7 8133

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“…Owing to low carbon content (37.50%), high oxygen content (49.93%), and high latent heat of vaporization (1178 kJ/kg), methanol has been used as an alternative fuel in diesel engines to reduce NOx and soot emission [1][2][3][4][5].…”

Section: Introductionmentioning

confidence: 99%

“…Alternatively, a fuel injector can be utilized to introduce methanol in the combustion chamber [8,9]. Out of the above mentioned modes, emulsion mode is seems to be more effective than the fumigation mode in terms of emission parameters, whereas 10% diesel -methanol emulsion is acceptable [10].…”

Section: Introductionmentioning

confidence: 99%

Optimization of methanol powered diesel engine: A CFD approach

Soni

Gupta

2016

Applied Thermal Engineering

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Comparison of emissions of a direct injection diesel engine operating on biodiesel with emulsified and fumigated methanol

Cited by 238 publications

References 36 publications

A numerical study on the performance, combustion and emission parameters of a compression ignition engine fuelled with diesel, palm stearin biodiesel and alcohol blends

A numerical study on the performance, combustion and emission parameters of a compression ignition engine fuelled with diesel, palm stearin biodiesel and alcohol blends

Effects of Canola Oil Biodiesel Fuel Blends on Combustion, Performance, and Emissions Reduction in a Common Rail Diesel Engine

Optimization of methanol powered diesel engine: A CFD approach

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