Experimental Investigation on the Droplet Burning Behavior of Diesel–Palm Biodiesel Blends

Ooi, Jong Boon; Yap, Jinng-Hui; Tran, Manh-Vu; Leong, Jeffrey Chin Kong

doi:10.1021/acs.energyfuels.9b02259

Cited by 15 publications

(9 citation statements)

References 32 publications

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“…Pembakaran droplet tunggal akan merepresentasikan droplet yang terbentuk pada pembakaran spray. Pada beberapa penelitian terdahulu, uji pembakaran droplet banyak dilakukan pada minyak nabati dan biodiesel yang terdiri atas senyawa multikomponen [18][19][20][21][22]. Pada penelitian tersebut, fenomena-fenomena yang diamati selama pembakaran droplet dikaitkan dengan konsentrasi senyawa yang paling dominan dalam bahan bakar.…”

Section: Pendahuluanunclassified

“…Droplet pada tahap awal pembakaran mengalami kavitasi, pembengkakan, dan terdistorsi, sehingga menghasilkan perubahan diameter yang flukuatif. Fluktuasi ini dapat dikaitkan dengan proses yang terjadi pada periode ini, terdiri atas kavitasi yang menyebabkan terbentuknya rongga dalam droplet, swelling yang menghasilkan pembengkakan akibat adanya kavitasi, dan secara bersamaan terjadi pembakaran pada permukaan droplet [18,20,39]. Kavitasi dan swelling menyebabkan peningkatan diameter droplet, sedangkan proses pembakaran pada permukaan droplet menyebabkan diameternya berkurang.…”

Section: Evolusi Diameter Dropletunclassified

“…Dengan meningkatnya konsentrasi oksigen, reaksi eksotermik dalam nyala api menghasilkan energi yang cukup untuk mengionisasi molekul gas, sehingga menghasilkan nyala api kebiruan pada asam lemak jenuh. [10,18]. Hal ini akan memperluas non-luminous zone pada pembakaran asam lemak yang dapat diamati pada asam laurat memiliki non-luminous zone yang besar.…”

Section: Visualisasi Nyala Apiunclassified

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Pengaruh Panjang Rantai Karbon dan Derajat Ketidakjenuhan terhadap Karakteristik Pembakaran Droplet Asam Lemak Tunggal

Ibadurrohman

Hamidi

Yuliati

2021

JRM

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This study aimed to investigate the effect of the different carbon chain lengths and the degree of unsaturation of six fatty acids as the constituent of vegetable oils. The droplet combustion was carried out at an ambient temperature and atmospheric pressure. The variation in the carbon chain length and the degree of unsaturation resulted in different physical and chemical properties of the fuel, which affect the droplet combustion characteristics. The increase of the carbon chain length results in longer ignition delay times and shorter burning durations, as well as higher droplet temperatures, burning rate constant, and specific power output. Conversely, an increase in the degree of unsaturation with the presence of double bond results in shorter ignition delay and longer burning duration, as well as higher droplet temperatures, but lower burning rate constant and specific power output. The droplet diameter evolution divides the combustion period into unsteady burning zones and quasi-linear burning zones. The flame dimension of unsaturated fatty acid is higher due to the soot formation at the top of the flame. A bluish flame related to the higher oxygen content in the molecule can be observed in saturated fatty acids. The short-chain saturated fatty acid has a large non-luminous zone because they are rich in oxygen. In contrast, the long-chain saturated fatty acid has a narrow non-luminous zone with high flame radiation.

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Section: Pendahuluanunclassified

Section: Evolusi Diameter Dropletunclassified

Section: Visualisasi Nyala Apiunclassified

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Pengaruh Panjang Rantai Karbon dan Derajat Ketidakjenuhan terhadap Karakteristik Pembakaran Droplet Asam Lemak Tunggal

Ibadurrohman

Hamidi

Yuliati

2021

JRM

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“…While many studies have examined the combustion characteristics of palm biodiesel droplet (Ooi et al 2019(Ooi et al , 2017Muelas et al 2019), only a few studies have investigated its evaporation characteristics. Hashimoto et al (2015) studied the evaporation of PME, its constituent esters, diesel, and n-hexadecane at elevated temperatures ranging from 473 to 873 K. All fuels were observed to have increased average evaporation coefficients with the increase in temperature.…”

Section: Introductionmentioning

confidence: 99%

Experimental study of evaporation of palm biodiesel with multi-walled carbon nanotubes additives at elevated temperatures

Amsal

Tran

Hung

et al. 2021

Int. J. Environ. Sci. Technol.

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Evaporation characteristics of palm biodiesel blended with multi-walled carbon nanotubes (MWCNTs) with different concentrations and outer diameters at ambient temperatures between 473 and 673 K have been investigated. Nano-additives were dispersed in concentration doses of 100 ppm and 200 ppm and outer diameters of 10-20 nm and 30-50 nm. Results showed that droplets underwent an initial heating period and a steady evaporation period without the occurrence of micro-explosions or puffing. In the steady evaporation period, the D 2 -law could be applied for all mixtures. Then droplets completely vaporised at the end of their lifetime. MWCNTs with smaller outer diameters (10-20 nm) exhibited a significantly greater enhancement of the evaporation constant across all temperatures, while larger outer diameters (30-50 mm) only provided improvement at higher ambient temperatures (> 600 K). A high degree of temperature dependence with the concentration of larger MWCNTs (30-50 nm) was observed with retardation of evaporation at lower ambient temperatures (< 523 K) and significant enhancement at higher ambient temperatures (> 600 K). The results suggested an internal aggregation mechanism of MWCNTs contributing to heat transfer to be responsible for this behaviour. Smaller MWCNTs (10-20 nm) with lower concentration (100 ppm) were found to provide the maximum enhancement of evaporation in the temperature domain of interest.

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“…A number of studies on biodiesels and excellent reviews on this topic (both fundamental studies and biodiesel utilization) can be found in the literature. ,,− The common findings noted in the current literature include the following: (i) biodiesels can be made from different feedstock and could be a potential candidate to partly replace fossil diesel used in compression ignition engines , and these biofuels could be blended with fossil diesel with or without additives, − (ii) biodiesels have a higher cetane number but a lower calorific value and higher viscosity compared to fossil diesel, , and (iii) fueling engines with biodiesels can help to decrease specific particulate matter in mass basic, while the effect of biodiesels on NO x formation and particle number and size distribution is not fully understood. , Further investigations of physical and chemical properties of biodiesels made from different feedstock are essential to have a comprehensive understanding of the engine performance when operating with biodiesels. The impact of FAME profiles, especially oxygen content, on the properties of biodiesels made from different feedstock, and the influence of fuel properties on fuel atomization and evaporation, according to the authors’ knowledge, is not quite clear in the literature.…”

Section: Introductionmentioning

confidence: 99%

Biodiesels Manufactured from Different Feedstock: From Fuel Properties to Fuel Atomization and Evaporation

et al. 2020

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Different from fossil diesel, biodiesels can be manufactured from different sources of biomass or animal fat. Each biodiesel manufactured from a certain feedstock consists of different fatty acid methyl esters (FAMEs). Its FAME types and fractions are unique and are solely controlled by the mother feedstock and not the manufacturing process. One key feature that makes biodiesels different from their fossil counterparts is the oxygen contained in biodiesels. The oxygen content, FAME types, and FAME fractions vary in a wide range among biodiesels made from different feedstock and this in turn affects the fuel properties and physical processes, including atomization and evaporation. An extensive analysis has been successfully carried out in this study to examine the role of oxygen content, carbon chain length, and unsaturation degree in different biodiesels and the influence of FAMEs on key fuel properties (heating value, cetane number, viscosity, and surface tension). Furthermore, some useful information related to (i) the morphology and density of fuel fragments derived close to the nozzle exit and (ii) drop evaporation is reported. The atomization characteristics are experimentally observed using a high-speed imaging technique developed earlier, while the evaporation study is theoretically conducted using the well-known D-square model. It shows that the oxygen in the biodiesel is directly linked to the carbon chain length and the number of double bonds in the fuel molecules as well as to the key fuel properties. The viscosity of biodiesels and their constituents has a certain impact on the morphology and population of fuel fragments derived in the breakup zone, while the thermal properties have a significant effect on biodiesel evaporation. The dependence of fuel properties on atomization at the downstream locations of the spray, where the breakup process has completed, is minimal.

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Experimental Investigation on the Droplet Burning Behavior of Diesel–Palm Biodiesel Blends

Cited by 15 publications

References 32 publications

Pengaruh Panjang Rantai Karbon dan Derajat Ketidakjenuhan terhadap Karakteristik Pembakaran Droplet Asam Lemak Tunggal

Pengaruh Panjang Rantai Karbon dan Derajat Ketidakjenuhan terhadap Karakteristik Pembakaran Droplet Asam Lemak Tunggal

Experimental study of evaporation of palm biodiesel with multi-walled carbon nanotubes additives at elevated temperatures

Biodiesels Manufactured from Different Feedstock: From Fuel Properties to Fuel Atomization and Evaporation

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