Low Temperature Combustion of Neat Biodiesel Fuel on a Common-rail Diesel Engine

Zheng, Ming; Han, Xiaoye; Tan, Yuyu; Kobler, Martin S.; Ko, Suek-Jin; Wang, Meiping; Mulenga, Mwila C.; Tjong, Jimi

doi:10.4271/2008-01-1396

Cited by 28 publications

(16 citation statements)

References 25 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In contrast, other researchers found that biodiesel reduced soot compared to diesel in LTC mode, stating that the oxygen content in biodiesel was the main contributor. 15–20 Zhang et al 22 found that adding n-butanol to diesel reduced soot emission in LTC mode, as a combined result of prolonged ignition delay, increased fuel oxygen fraction and improved fuel–air mixing. By comparing soot emissions between diesel–40% n-butanol and diesel–40% 2,5-dimethylfuran, Zhang et al 23 stated that ignition delay was a more important factor for soot reduction than fuel oxygen.…”

Section: Resultsmentioning

confidence: 99%

“…15–20 But an exception was presented by Tompkins et al, 21 arguing that shorter ignition delay of biodiesel caused by higher cetane number was the main reason for higher soot from biodiesel. At a fixed injection timing, some researchers found that biodiesel produced higher NO x 15,16 and lower CO and HC emissions 21 in LTC mode, and some others presented that NO x , 19 CO and HC 16 emissions of biodiesel are comparable with diesel. At a given combustion phasing, Northrop et al 17 found that NO x emission from LTC mode was not affected by biodiesel.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Emissions as functions of fuel oxygen and load from a premixed low-temperature combustion mode

Zhu

Bohac

Huang

et al. 2013

International Journal of Engine Research

View full text Add to dashboard Cite

Soot, mono-nitrogen oxides (NOx), carbon monoxide (CO) and hydrocarbon emissions are investigated as functions of fuel oxygen and engine load in a single-cylinder diesel engine operated in a premixed low-temperature combustion mode by isolating fuel oxygen from other fuel properties and removing or minimizing variations in engine combustion parameters. It is found that at high loads (high global equivalence ratios), soot is reduced as fuel oxygen increases. Over the load range tested, CO and hydrocarbon emissions are not affected by fuel oxygen fraction. NOx emission increases as load is decreased because intake composition changes. NOx emission is not directly affected by fuel oxygen. The difference in NOx emission among the different oxygen fuels is indirectly caused by different exhaust composition affecting intake composition. Combustion efficiency and indicated thermal efficiency are similar for the test fuels with different oxygen fractions.

show abstract

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Emissions as functions of fuel oxygen and load from a premixed low-temperature combustion mode

Zhu

Bohac

Huang

et al. 2013

International Journal of Engine Research

View full text Add to dashboard Cite

show abstract

“…In conventional diesel combustion, biodiesel can reduce soot cornpared to diesel [19,21,39,40]. In LTC, reduced soot by biodiesel has been reported by Zheng et al [41], Northrop et al [42], and Veltman et al [43], with the contrary reported by Tompkins et. al., arguing that the shorter ignition delay being the main reason for the higher soot of biodiesel [44].…”

Section: Fig 10 Soot and Nox Of Be20mentioning

confidence: 90%

Defeat of the Soot/NOx Trade-off Using Biodiesel-Ethanol in a Moderate Exhaust Gas Recirculation Premixed Low-Temperature Combustion Mode

Zhu

Bohac²,

Huang

et al. 2013

Journal of Engineering for Gas Turbines and Power

View full text Add to dashboard Cite

The soot/nitric oxides (NOJ trade-off of diesel, biodiesel, and biodiesel-ethanol in a moderate exhaust gas recirculation (EGR) premixed low temperature combustion (LTC) mode is investigated in this study. Compared to diesel, biodiesel demonstrates poorer spray behavior and shorter ignition delay, but its oxygen content results in less soot. Blending ethanol into biodiesel enhances spray behavior, prolongs ignition delay, and further increases fuel oxygen fraction, resulting in a larger reduction in soot. In the moderate EGR premixed low temperature combustion mode, an obvious soot/NO^. trade-off is demonstrated with diesel fuel. The soot/NO^ trade-off is improved by biodiesel fuel and defeated by the biodiesel-ethanol blend. Low soot, low NO^, and high combustion efficiency are achieved with the biodiesel-ethanol blend and proper EGR rate.

show abstract

“…Based on these reasons, it was necessary to search for advanced combustion techniques and alternative fuels to fulfill these challenges. Biodiesel has been widely used as an alternative fuel because of high CN (cetane number), renewability as well as good compatibility for internal combustion engine [1][2][3][4][5].…”

Section: Introductionmentioning

confidence: 99%

“…Biodiesel had different compressibility from diesel because of its higher viscosity than that of diesel fuel, resulted in significant changes in spray characteristics when directly used in diesel engine, thus affected the quality of mixture formation and a series of evolution processes of soot particles. In addition, although the addition of biodiesel could significantly reduce CO, soot and HC emissions, some unregulated emissions (acetaldehyde, benzene and 1,3-butadiene) were produced from biodiesel [10][11][12][13][14]. These emissions originated from the combustion of a small amount of alcohols contained in biodiesel.…”

Section: Introductionmentioning

confidence: 99%

Effects of injection timing on combustion performance and emissions in a diesel engine burning biodiesel blended with methanol

et al. 2021

View full text Add to dashboard Cite

Currently, biodiesel has been received much attention from many researchers around the world due to its clean and renewable characteristics. In the present study, combustion and emissions characteristics have been studied on a modified four-cylinder, 4-stroke, water-cooled, DICI engine equipped with a common rail fuel injection system fueled with methanol-biodiesel blends as well as pure biodiesel. The experiment was operated at a constant engine speed of 1800 rpm and injection timing from 2.5 to 22.5?CA BTDC. With the injection timing advanced peak in-cylinder pressure and maximum HRR(heat release rate)increased while combustion start points were advanced. Ignition delay was shorten first and then prolonged while BTE(brake thermal efficiency)was increased first and then decreased. With the injection timing in advance, NOX emissions increased, 1,3-butadiene and benzene emissions decreased while HC and acetaldehyde emissions decreased first and then increased, and soot emissions increased first and then decreased.

show abstract

Low Temperature Combustion of Neat Biodiesel Fuel on a Common-rail Diesel Engine

Cited by 28 publications

References 25 publications

Emissions as functions of fuel oxygen and load from a premixed low-temperature combustion mode

Emissions as functions of fuel oxygen and load from a premixed low-temperature combustion mode

Defeat of the Soot/NOx Trade-off Using Biodiesel-Ethanol in a Moderate Exhaust Gas Recirculation Premixed Low-Temperature Combustion Mode

Effects of injection timing on combustion performance and emissions in a diesel engine burning biodiesel blended with methanol

Contact Info

Product

Resources

About