Cetane numbers of branched and straight-chain fatty esters determined in an ignition quality tester☆

Knothe, Gerhard; Matheaus, Andrew; Ryan, Thomas W.

doi:10.1016/s0016-2361(02)00382-4

Cited by 521 publications

(300 citation statements)

References 20 publications

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“…This can be related to the higher cetane number of the oil compared to diesel fuel and therefore that also affects blends tested. It is well known that higher cetane number shortening the ignition delay [8], [17]- [20].…”

Section: Resultsmentioning

confidence: 99%

Engine performance of a single cylinder direct injection diesel engine fuelled with blends of Jatropha Curcas oil and standard diesel fuel

Piloto¹,

Errasti²,

Ferrer³

et al. 2024

RE&PQJ

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Blends of Jatropha Curcas oil and standard diesel fuel were evaluated (without pre-heating). The engine tests for the blends were performed in a Petter single cylinder direct injection diesel engine under steady state conditions at high loads. Engine speeds between 1300-1700 rpm were selected for the engine tests. Torque, power output, specific fuel consumption, in cylinder pressure, ignition delay, rate of heat released and exhaust composition were evaluated. The tested blends between 10-20% of oil shown lower effective torque and power output joint to a higher specific fuel consumption related to the lower heating value of Jatropha oil compared to diesel fuel. Lower pressure peaks and rates or pressure rises were observed when Jatropha blends are used. A decrease in the rate of heat released and shorter ignition delay were observed for the blends. Decreases in HCand CO emissions were observed for blends compared to diesel fuel. Both alternatives assessed shown that the differences observed compared to diesel fuel, can be partially restored with engines regulation. The use of Jatropha oil in order to be a partial or full alternative to the use of diesel fuel for energy production was achieved.

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Section: Resultsmentioning

confidence: 99%

Engine performance of a single cylinder direct injection diesel engine fuelled with blends of Jatropha Curcas oil and standard diesel fuel

Piloto¹,

Errasti²,

Ferrer³

et al. 2024

RE&PQJ

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show abstract

“…In other words, because their enthalpy of vaporization is higher than that of fuels with a branched molecular structure, they have low bulk modulus, low ignition delay, lower fuel injection during premixing, and lower NO x emissions. 10 According to reports in the literature, [34][35][36][37] NO x emissions increase in response to increasing flame front and combustion chamber temperatures. Under severe operating conditions with high engine load, the temperature of the flame front and the combustion chamber directly affect the combustion process, altering the NO x emissions.…”

Section: Resultsmentioning

confidence: 99%

“…Unsaturated fatty acids (methyl linoleate, C18:2; > 50%) predominated, which favors the oxidative process, according to the literature. 34 However, to date there are no data that demonstrate the influence of fatty acids on PM emissions. On the other hand, an analysis of the iodine value (IV) indicated that the IV of the ER biodiesel additive was higher.…”

Section: Resultsmentioning

confidence: 99%

Biodiesel Glycerides from the Soybean Ethylic Route Incomplete Conversion on the Diesel Engines Combustion Process

Cataluña

Shah

Pelisson

et al. 2017

J. Braz. Chem. Soc.

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An evaluation was made to determine the effect of the glycerides presence resulting from the incomplete conversion of soybean biodiesel produced via alkaline catalysis and ethylic route on engine performance, and emissions in formulations containing 10 and 20% (m/m) of biodiesel used as additives in base diesel with low sulfur content and cetane ratings of 45 and 50. By way of comparison, similar formulations were used with soybean biodiesel methyl route with low concentration of glycerides. Tests on a diesel cycle engine with a mechanical fuel injection system indicated that the presence of glycerides decreases the volatility of biodiesel and increase the cetane number of fuels. The higher the cetane number, the higher the particulate matter emissions and the lower the unburned hydrocarbon emissions. Formulations with cetane number 50 showed higher emissions of particulate matter. The presence of glycerides in biodiesel reduces the fuel's vapor pressure, thereby increasing the cetane number and emissions of particulate matter and lower emissions of unburned hydrocarbons. The specific consumption of fuels formulated with biodiesel increases due to its lower enthalpy of combustion and to the presence of glycerides in fuels formulated with soybean biodiesel produced via the ethanol route.

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“…In addition, the 1-alkenes can reduce cetane number of the green-diesel [10] and become the precursors for oxidation reactions. In principle, the long chain biohydrocarbon fractions, especially n-alkanes, are much MATEC Web of Conferences 156, 03035 (2018) https://doi.org/10.1051/matecconf/201815603035 RSCE 2017 more important in green diesel fuel to increase the cetane number than 1-alkene [11].…”

Section: Introductionmentioning

confidence: 99%

High Selectivity of Alkanes Production by Calcium Basic Soap Thermal Decarboxylation

et al. 2018

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Abstract. Renewable fuel production from vegetable oil and fat or its fatty acids by direct decarboxylation has been widely reported. An innovative approach to produce drop-in fuel via thermal catalytic decarboxylation of basic soap derived from palm stearin reported in this research. The catalytic effect of the calcium and magnesium metals in the basic soap and its decarboxylation on drop-in fuel yield and product distribution was studied. The catalytic effect was tested in the temperature range up to 370 o C and atmospheric pressure for 5 hours in a batch reactor. It has been proved that the calcium basic soap decarboxylation, effectively produce the drop-in fuel in carbon ranges C 8 -C 20 , in which more than 78% selectivity toward alkane. Whereas, only 70% selectivity toward alkane has been resulted from the magnesium basic soap decarboxylation.

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Cetane numbers of branched and straight-chain fatty esters determined in an ignition quality tester☆

Cited by 521 publications

References 20 publications

Engine performance of a single cylinder direct injection diesel engine fuelled with blends of Jatropha Curcas oil and standard diesel fuel

Engine performance of a single cylinder direct injection diesel engine fuelled with blends of Jatropha Curcas oil and standard diesel fuel

Biodiesel Glycerides from the Soybean Ethylic Route Incomplete Conversion on the Diesel Engines Combustion Process

High Selectivity of Alkanes Production by Calcium Basic Soap Thermal Decarboxylation

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