Combustion characteristics of colloidal droplets of jet fuel and carbon based nanoparticles

Ghamari, Mohsen; Ratner, Albert

doi:10.1016/j.fuel.2016.10.040

Cited by 83 publications

(47 citation statements)

References 27 publications

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“…The lesser the heat conductivity, the more the ignition delay, and the lesser the vapor pressure, the more the ignition delay. Both AB [18] and MWNT [15] show an increased heat conductivity in hydrocarbon-based liquid fuels. Section 3.4 shows that they also decrease vapor pressure.…”

Section: Ignition Delay Timementioning

confidence: 99%

“…The well-established experimental method used for this work has previously been used to characterize various combustion properties for liquid fuels, such as burning or combustion rate [13,[15][16][17][18][19], ignition delay [13,18], and total combustion time [13,18]. This benchtop method uses only a small amount of sample, which is important because of the high cost of the nanomaterials involved, especially multiwalled carbon nanotubes (MWNT).…”

mentioning

confidence: 99%

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Effect of carbon-based nanoparticles on the ignition, combustion and flame characteristics of crude oil droplets

Singh

Esmaeilpour

Ratner

2020

Energy

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The use of in-situ burning (ISB) as a clean-up response in the event of an oil spill has generated controversy because of unburned hydrocarbons and products of incomplete combustion left behind on an ISB site. These substances threaten marine life, both in the ocean and on the ocean floor. Treating crude oil as a multicomponent liquid fuel, this manuscript investigates the effect of carbon-based nanomaterials, acetylene black (AB) and multi-walled carbon nanotube (MWNT), on the combustion and flame characteristics of crude sourced from the Bakken formation (ND, USA). Sub-millimeter droplets of colloidal suspensions of Bakken crude and nanomaterials at various particle loadings were burned, and the process was captured with CMOS and CCD cameras. The resulting images were post-processed to generate burning rate, ignition delay, total combustion time, and flame stand-off (FSR) ratio data for the various crude suspensions. A maximum combustion rate enhancement of 39.5% and 31.1% was observed at a particle loading of 0.5% w/w acetylene black nanoparticles and 0.5% w/w multi-walled carbon nanotubes, respectively. Generally, FSR for pure Bakken was noted as larger than for Bakken with nanoparticle additives. These results are expected to spur further investigations into the use of nanomaterials for ISB crude oil clean-ups.

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Section: Ignition Delay Timementioning

confidence: 99%

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confidence: 99%

Effect of carbon-based nanoparticles on the ignition, combustion and flame characteristics of crude oil droplets

Singh

Esmaeilpour

Ratner

2020

Energy

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“…The well-established experimental setup used in present research has been previously used to determine combustion characteristics of liquid fuels [7][8][9] and yields convenient measurement of vital important properties such as ignition delay [9] and burning rates [7][8][9]. Furthermore, this method is implementable at a lab scale, uses small sample quantities, and promotes spherical symmetry of the droplet as it burns.…”

Section: Introductionmentioning

confidence: 99%

“…This research has been formulated to lay the groundwork for the eventual modification of crude combustion behavior using physical and chemical means to improve transportation safety. Various nanomaterials [8,9] and polymeric additives [7] are envisioned to be used in the future to bring about such combustion behavior modifications.…”

Section: Introductionmentioning

confidence: 99%

Investigation of Combustion Properties and Soot Deposits of Various US Crude Oils

2019

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The oil boom in the North Dakota oilfields has resulted in improved energy security for the US. Recent estimates of oil production rates indicate that even completion of the Keystone XL pipeline will only fractionally reduce the need to ship this oil by rail. Current levels of oil shipment have already caused significant strain on rail infrastructure and led to crude oil train derailments, resulting in loss of life and property. Treating crude oil as a multicomponent liquid fuel, this work aims to understand crude oil droplet burning and thereby lead to methods to improve train fire safety. Sub-millimeter sized droplets of Pennsylvania, Texas, Colorado, and Bakken crude were burned, and the process was recorded with charge-couple device (CCD) and complementary metal-oxide semiconductor (CMOS) high-speed cameras. The resulting images were post-processed to obtain various combustion parameters, such as burning rate, ignition delay, total combustion time, and microexplosion behavior. The soot left behind was analyzed using a Scanning Electron Microscope (SEM). This data is expected be used for validation of combustion models for complex multicomponent liquid fuels, and subsequently in the modification of combustion properties of crude oil using various additives to make it safer to transport.

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“…Carbon-based nanoparticles offer a way around that, since they are combustible themselves but can also enhance the combustion behavior of base fuel as a nanofuel. The effect of carbon nanotubes [19][20], carbon nanoparticles [21], multi-walled carbon nanotubes [21], acetylene black [22], and graphene [21] [23] on combustion properties of real-life liquid fuels has been examined in recent years.…”

Section: Introductionmentioning

confidence: 99%

Experimental Investigation of the Settling Characteristics of Carbon and Metal Oxide Nanofuels

Singh¹,

Lopes²,

Hentges³

et al. 2019

j nanofluids

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Fuels dispersed with engineered nanoparticle additives, or nanofuels, are desirable for the vastly different combustion properties such as combustion rate and ignition delay they exhibit compared to base fuels. The stability of such nanofuels over time and under different particle loadings is a very important parameter to consider before they can be put into practical use. Many techniques exist today to analyze suspension stability, which have been developed to analyze water-based nanofluids. Sometimes these techniques can be expensive, and/or require specialized equipment, and/or require a method that is invasive and disturbs the suspension. Present research uses a non-contact, non-invasive, low-cost experimental setup to analyze suspension stability over long periods of time. Nanofuels made from carbon-based nanomaterials (acetylene black, multiwalled carbon nanotubes) and metal oxide nanomaterials (copper oxide, aluminum oxide) with hydrocarbon fuels (canola biodiesel, petrodiesel) have been prepared and their settling rates have been analyzed over the period of three days. It is found that metal oxides go through several metastable states as they settle. The effect of initial concentration and liquid column height is shown. It is hoped that present research showcases the positive traits of the presented technique and will spark further interest in nanofuel stability. Number of words: 198

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Combustion characteristics of colloidal droplets of jet fuel and carbon based nanoparticles

Cited by 83 publications

References 27 publications

Effect of carbon-based nanoparticles on the ignition, combustion and flame characteristics of crude oil droplets

Effect of carbon-based nanoparticles on the ignition, combustion and flame characteristics of crude oil droplets

Investigation of Combustion Properties and Soot Deposits of Various US Crude Oils

Experimental Investigation of the Settling Characteristics of Carbon and Metal Oxide Nanofuels

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