Experimental investigation of the effects of passivated aluminum nanoparticles on butane flame structure

Masoumi, Soheil; Houshfar, Ehsan; Ashjaee, Mehdi

doi:10.1016/j.expthermflusci.2018.08.025

Cited by 4 publications

(4 citation statements)

References 47 publications

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“…This is in line with Huang's study [41] which states that the increase in the percentage of nanoparticles within the mixture enhanced its flame speed. Flame speed of laminar butane-air increases by 18.9% and 29.1% in terms of the addition of aluminum nanoparticles by 2 wt% and 5 wt%, respectively [25]. The flame speed will likely increase due to the release of heat energy from the aluminum nanoparticles [42].…”

Section: Figure 9 Sl Vs γAl2o3 Nano Particles Concentrationmentioning

confidence: 99%

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Experimental Study on the Effect of Nano Additives γAl2O3 and Equivalence Ratio to Bunsen Flame Characteristic of Biodiesel from Nyamplung (Calophyllum Inophyllum)

Pambudi

Ilminnafik

Junus

et al. 2021

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Nano γAl2O3 has been one of the nanometal oxides that has improved the characteristics of biodiesel. The effect of γAl2O3 nanoparticles addition on premixed flame combustion is investigated with an experiment on the laminar flame speed of Calophyllum inophyllum methyl ester 30% and 70% petrodiesel mixtures, at atmospheric pressure and preheated temperature T = 473K. The γAl2O3 nanoparticles added to CIME30 biodiesel were 0ppm, 100ppm, 200ppm, and 300ppm. Experiments were carried out on a bunsen burner. The equivalent ratio of the mixture between ϕ = 0.67 to 1.17. Experiments revealed that the addition of nanoparticles to CIME30 biodiesel expands the flammability limit and increases the laminar flame speed. CIME30 without nanoparticles, flame stable between ϕ = 0,76 -1,17. CIME30 with nanoparticles, flame stable between ϕ = 0,67 -1,17. Combustion of CIME30 required a lot of air. The highest laminar flame speed occurred at the equivalent ratio ϕ = 0.83. The highest laminar flame speed of CIME30 0, 100, 200, and 300 ppm were 30.77, 34.50, 35.90, 38.45 cm/s respectively. The higher the nano γAl2O3 concentration the higher the laminar flame speed. This occurs due to the catalytic effect of γAl2O3 on biodiesel and its mixtures.

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Section: Figure 9 Sl Vs γAl2o3 Nano Particles Concentrationmentioning

confidence: 99%

“…The combustion of aluminum particles methane-air mixture causes the release of additional heat, which will most likely increase the rate of combustion [24]. The laminar flame speed of butane-air has increased by 18.9% and 29.1% in terms of the addition of aluminum nanoparticles by 2 wt% and 5 wt%, respectively [25].…”

mentioning

confidence: 99%

Experimental Study on the Effect of Nano Additives γAl2O3 and Equivalence Ratio to Bunsen Flame Characteristic of Biodiesel from Nyamplung (Calophyllum Inophyllum)

Pambudi

Ilminnafik

Junus

et al. 2021

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“…The maximum temperature (∼2000 K) of the mixture flame is close to the melting point of bulk alumina. 24,26 Therefore, there is a possibility of the oxide shell melting when considering the fact that the melting temperature decreases at the nanoscale. 4,5 Especially, under a high heating rate, the melting and expanding of core aluminum lead to sufficiently high tensile stress inside the oxide shell, followed by dynamic spallation of the oxide shell and exposure of the liquid Al droplet, which directly reacts with environmental oxygen.…”

Section: Introductionmentioning

confidence: 99%

“…The combustion models of AlNPs can be divided into homogeneous gas-phase kinetically controlled regimes and heterogeneous chemical reactions at the particle surface. The maximum temperature (∼2000 K) of the mixture flame is close to the melting point of bulk alumina. , Therefore, there is a possibility of the oxide shell melting when considering the fact that the melting temperature decreases at the nanoscale. , Especially, under a high heating rate, the melting and expanding of core aluminum lead to sufficiently high tensile stress inside the oxide shell, followed by dynamic spallation of the oxide shell and exposure of the liquid Al droplet, which directly reacts with environmental oxygen. − For either condition, the melting or the destruction of the oxide shell leads to the removal of the oxide shell protection, and subsequent burning is expected to occur in the gas phase. Moreover, Al vapor and AlO can be detected at 1500 and 2000 K, respectively, for the combustion of Al nanoparticles .…”

Section: Introductionmentioning

confidence: 99%

Ignition and Combustion of Hydrocarbon Fuels Enhanced by Aluminum Nanoparticle Additives: Insights from Reactive Molecular Dynamics Simulations

Wang

et al. 2021

J. Phys. Chem. C

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Owing to the unique properties of aluminum nanoparticles, these nanoadditives show promise in improving the combustion performance of traditional hydrocarbon fuels. Here, the ignition and combustion processes of the simplest hydrocarbon, methane, with the addition of aluminum nanoparticles, were investigated using ReaxFF molecular dynamics simulations. The oxidation of the initially unoxidized aluminum nanoparticles is a microexplosive violent combustion process. The simulation results revealed that the presence of such aluminum nanoparticles reduces the ignition delay of methane and improves its combustion efficiency. The activation energy of methane dissociation is significantly reduced by ∼47% in the presence of aluminum nanoparticles compared to the pure methane system. It is found that the mechanism of this combustion enhancement is from the significant increase in the number of atomic oxygen with the addition of aluminum nanoparticles, which accounts for the decomposition of methane by more than 60%. Moreover, the formation of atomic oxygen is mainly caused by the instability of low-coordination atoms on the surface of the Al x O y cluster. Further simulations of aluminum particles with oxide shells show that such particles can also promote the production of atomic oxygen to a small extent. It is believed that the findings presented here provide an important perspective on understanding the influence of aluminum nanoparticles on the combustion of hydrocarbon fuels at an atomic scale, and have an instructive significance in improving combustion efficiency.

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Experimental investigation on premixed flame of H2/CO in a slot burner using the Mach-Zehnder interferometry

Nournai

Houshfar

Ashjaee

et al. 2019

Optics & Laser Technology

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Experimental investigation of the effects of passivated aluminum nanoparticles on butane flame structure

Cited by 4 publications

References 47 publications

Experimental Study on the Effect of Nano Additives γAl2O3 and Equivalence Ratio to Bunsen Flame Characteristic of Biodiesel from Nyamplung (Calophyllum Inophyllum)

Experimental Study on the Effect of Nano Additives γAl2O3 and Equivalence Ratio to Bunsen Flame Characteristic of Biodiesel from Nyamplung (Calophyllum Inophyllum)

Ignition and Combustion of Hydrocarbon Fuels Enhanced by Aluminum Nanoparticle Additives: Insights from Reactive Molecular Dynamics Simulations

Experimental investigation on premixed flame of H2/CO in a slot burner using the Mach-Zehnder interferometry

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