A comprehensive review on the effects of additives on fundamental combustion characteristics and pollutant formation of biodiesel and ethanol

Lee, Chia Chun; Tran, Manh-Vu; Tan, Boon Thong; Scribano, Gianfranco; Chong, Cheng Tung

doi:10.1016/j.fuel.2020.119749

Cited by 60 publications

(10 citation statements)

References 147 publications

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“…They have achieved good results in improving nanoparticles' physical and chemical properties and controlling nanoparticles' size, shape, and porosity. Therefore, selecting a suitable preparation method is very important for nanofluids [59][60][61][62][63][64]. The synthesis methods of nanofluids are usually in one step, two step and some new techniques have arrisen.…”

Section: Different Preparation Methods To Obtain Stable Nanoparticlesmentioning

confidence: 99%

The Effects of Nano-Additives Added to Diesel-Biodiesel Fuel Blends on Combustion and Emission Characteristics of Diesel Engine: A Review

Wang

Meng

2022

Energies

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How to improve the combustion efficiency and reduce harmful emissions has been a hot research topic in the engine field and related disciplines. Researchers have found that nano-additives to diesel-biodiesel fuel blends have achieved significant results. Many research results and both current and previous studies on nanoparticles have shown that nano-additives play an essential role in improving the performance of internal combustion engines and reducing the emission of harmful substances. This paper summarizes the recent research progress of nanoparticles as additives for diesel-biodiesel fuel blends. Firstly, the excellent properties of nanoparticles are described in detail, and the preparation methods are summarized and discussed. Secondly, the effects of several commonly used nanoparticles as diesel-biodiesel fuel blends on combustion performance and harmful substances emissions in terms of combustion thermal efficiency, brake specific fuel consumption, CO, UHC and NOx, are reviewed. Finally, the effects of nano-additives on internal combustion engines, the environment and human health are discussed. The work carried out in this paper can effectively contribute to the application of nanomaterials in the fuel field. Based on our work, the researchers can efficiently select suitable nano-additives that enable internal combustion engines to achieve efficient combustion and low-emission characteristics.

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Section: Different Preparation Methods To Obtain Stable Nanoparticlesmentioning

confidence: 99%

The Effects of Nano-Additives Added to Diesel-Biodiesel Fuel Blends on Combustion and Emission Characteristics of Diesel Engine: A Review

Wang

Meng

2022

Energies

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“…The addition of oxygenate compounds to biodiesel fuel has a disadvantage in that their heating value is lower than that of biodiesel alone. This means that a greater amount of fuel is required to generate the same output power when oxygenate molecules are present [31]. However, the addition of oxygenated substances, such as alcohol, can lower the ignition temperature and shorten the ignition delay time, which can increase the likelihood of ignition occurrence and accelerate the combustion of the fuel droplets [32].…”

Section: Temperature History Of Dropletmentioning

confidence: 99%

“…Due to the buoyancy effect, the bright non-luminous flame zone in the LiA case shows the early production of soot precursors, which eventually float away and accumulate towards the flame tip. These precursors and soot aggregates form between the droplet surface and the flame front, rising upwards due to natural convection, resulting in significant soot concentrations at the top of the flame [31]. Under normal gravity, burning droplets produce soot particles at the flame's tip due to natural convection [34].…”

Section: Influence Of Alcohols On Flame Evolutionmentioning

confidence: 99%

The Effect of Alcohol Compounds on Droplet Combustion Characteristics of Unsaturated Fatty Acid of Linoleic Acid

Hamidi

Ibadurrohman²,

Yuliati³

et al. 2023

Trends Sci

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Alcohol compounds have become a popular choice as additives for improving the performance of biodiesel. However, given the complexity of biodiesel, which is composed of various components of vegetable oil, it requires intensive research to fully understand its behavior. This study aims to investigate the impact of alcohol compounds on the droplet combustion characteristics of linoleic acid, an unsaturated fatty acid. Four alcohol compounds, namely methanol, ethanol, propanol, and butanol, were utilized to evaluate their effects on the combustion properties of the fuel mixtures. The droplet combustion characteristics were observed under normal atmospheric pressure and temperature conditions, with the fuel mixture consisting of 80 % linoleic acid and 20 % alcohol compounds. Our findings indicate that the addition of alcohol compounds to linoleic acid significantly reduced the ignition delay time, although the droplet lifetime was slightly increased. Moreover, it was observed that alcohols with shorter carbon chains had a greater impact on reducing the ignition delay time. Additionally, the results demonstrated that the alcohol compounds could accelerate the rate of increasing combustion temperature, reduce soot formation, and shorten the duration of soot formation. Furthermore, it was found that alcohol with a short carbon chain had a more pronounced effect on the overall combustion characteristics of linoleic acid. Overall, our study sheds light on the effects of alcohol compounds on the droplet combustion characteristics of linoleic acid, providing valuable insights for the optimization of biodiesel performance. HIGHLIGHTS Alcohol has a significant impact on the properties of unsaturated fatty acids, specifically on factors such as ignition delay time, droplet lifetime, temperature, flame dimension, and soot production The addition of alcohol as an additive, results in a reduction in soot generation and a shorter duration of soot formation The length of the carbon chain in the alcohol additive plays a crucial role in the combustion properties of linoleic acid. Alcohols with shorter carbon chains have a greater impact on the overall combustion properties GRAPHICAL ABSTRACT

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“…However, these fuels also present drawbacks, mainly in viscosity, volatility properties that affect atomization and consequently combustion efficiency. Recently, the addition of nanoparticles has been proposed as a possible solution to enhance biofuel combustion performance [5]. Nanoparticles suspended in a liquid fuel as a potential secondary energy carrier have been recently studied due to nanotechnology development.…”

Section: Introductionmentioning

confidence: 99%

Single droplet combustion of aluminum nanoparticles added to a biofuel: effect of particle concentration and ambient temperature

Ferrão

Mendes²,

Moita³

et al. 2021

ICLASS

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The fast expansion and growth of the aviation sector, coupled with the greenhouse gas and pollutant emissions, requires urgent solutions. A starting point to change this sector paradigm could be a new energy source for aviation gas turbines, focused on potential carbon neutral fuels, e.g., biofuels. A possible solution is nanoparticles addition to improve the biofuel properties and mitigate the problems inherent to their use. The present work experimentally evaluates the combustion characteristics of single droplets of HVO (NExBTL) with aluminum nanoparticles. The ambient temperature was varied from 600°C to 1000°C. Three particle concentrations (0.2, 0.5, and 1.0 wt.%) were investigated with a fixed particle size of 40 nm. This study examined the combustion of droplets with an initial diameter of 250 µm using a falling droplet method. The results reveal that for nanofuels, the droplet size evolution curve is not in agreement with D 2 -law and display a unique disruptive burning phenomenon at the end of the droplet lifetime. It was noticed that the burning rate of biofuel is considerably enhanced with the addition of nanoparticles, being the highest value for the nanofuel with a particle concentration of 1.0 wt.%.

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A comprehensive review on the effects of additives on fundamental combustion characteristics and pollutant formation of biodiesel and ethanol

Cited by 60 publications

References 147 publications

The Effects of Nano-Additives Added to Diesel-Biodiesel Fuel Blends on Combustion and Emission Characteristics of Diesel Engine: A Review

The Effects of Nano-Additives Added to Diesel-Biodiesel Fuel Blends on Combustion and Emission Characteristics of Diesel Engine: A Review

The Effect of Alcohol Compounds on Droplet Combustion Characteristics of Unsaturated Fatty Acid of Linoleic Acid

Single droplet combustion of aluminum nanoparticles added to a biofuel: effect of particle concentration and ambient temperature

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