Combustion characteristics of butanol isomers in multiphase droplet configurations

Liu, Yucheng; Alam, Fahd E.; Xu, Yuhao; Dryer, Frederick L.; Avedisian, C. Thomas; Farouk, Tanvir

doi:10.1016/j.combustflame.2016.04.018

Cited by 23 publications

(3 citation statements)

References 59 publications

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“…Several chemical mechanisms − of butanol isomers (Figure ) have been developed to model different combustion problems, including jet-stirred reactors, ,, laminar flame speeds, ,− ignition delay times, , − ,,− and ignition and flames at high-pressure conditions. , Moreover, some studies on combustion in engines using only n -butanol or as a blend with diesel or gasoline, − used detailed chemical mechanisms to improve predictions of combustion performance and n -butanol pollutant gases on combustion engine experiments.…”

Section: Introductionmentioning

confidence: 99%

A Reduced Kinetic Mechanism for the Combustion of n-Butanol

2018

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A reduced chemical mechanism for modeling the combustion of n-butanol in air, including low temperature ignition phenomena, was obtained in the present work. To this end, only 14 chemical-kinetic reactions and six chemical species were included to a short base mechanism (the so-called San Diego mechanism). Two important features of the reaction of the hydroxybutyl radical C4H8OH-1 radical with molecular oxygen involve a path competition of low and high-temperature reactions, and low total available heat release not promoting NTC behavior. Validation of the chemical mechanism shows an excellent agreement against experimental data of laminar flame velocities, ignition delay times, and jet stirred reactors. These numerical results confirm that this reduced mechanism can be used instead of larger mechanisms, particularly when computing-time is an important fact to be considered for modeling practical combustion systems.

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Section: Introductionmentioning

confidence: 99%

A Reduced Kinetic Mechanism for the Combustion of n-Butanol

2018

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“…This base case or canonical configuration of liquid fuel combustion is ideally suited to examine the complexities of burning algal biofuel mixtures because of the simplicity of the transport process it brings to this otherwise complex problem. Recent studies have successfully simulated the burning characteristics of the spherically symmetric case, − and it is currently the only liquid phase burning configuration amenable to direct numerical simulation that incorporates the effects of detailed combustion chemistry, preferential vaporization at the interface, moving boundary effects due to fuel evaporation at the droplet surface, transient gas and liquid transports, variable fuel properties, flame radiation, property dependencies on temperature and composition, formation of particulate matter (i.e., soot), and phase equilibrium dynamics which are relevant to miscible mixtures. Data obtained from the configuration of Figure have proven to be valuable for validating comprehensive models of droplet burning and for providing new insights into the controlling mechanisms involved.…”

Section: Introductionmentioning

confidence: 99%

Burning of Algae-Derived Biofuel Droplets and Their Mixtures with Jet Fuel

Brunson

Avedisian

et al. 2019

Energy Fuels

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This paper reports new results about the combustion dynamics of hydroprocessed renewable jet fuel droplets derived from heterotrophic algae (AHRJ) burning under conditions that promote one-dimensional transport dynamics and near spherically symmetric burning conditions. Results are compared between Jet-A and three AHRJ/Jet-A mixtures containing 25, 50, and 75% AHRJ by volume. The results show that AHRJ droplets burn slightly faster than Jet-A and have a significantly reduced sooting propensity. Detailed chemical analysis also shows that AHRJ contains virtually no aromatics while the aromatic content of Jet-A was 16% by volume. The influence of composition on the burning rate is explained using a simple scaling argument that illustrates the importance of liquid density and other properties.

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“…Some works have been conducted to research droplet combustion of pure n-butanol [28,29], pure biodiesel [30,31] and diesel-biodiesel-alcohol (methanol, ethanol and propanol) blends [22,32,33]. However, only few works were reported on droplet combustion of n-butanol-biodiesel blends.…”

Section: Introductionmentioning

confidence: 99%

Experimental study on combustion characteristics of an n-butanol-biodiesel droplet

Huang

et al. 2018

Energy

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This work was aimed to study droplet combustion which was a foundation of spray combustion. Combustion characteristics of BUT00 (pure biodiesel) and BUT50 (50% n-butanol and 50% biodiesel by mass) were investigated using droplet suspension technology under 1 bar and 900 K. One flame is observed for BUT00 while two flames are observed for BUT50. The flame of BUT00 underwent successively faint luminosity, bright luminosity, soot aggregate and soot spread. The first flame of BUT50 was faint and the second one was similar to that of BUT00 because they were caused by n-butanol and biodiesel combustion respectively. Before the auto-ignition of BUT00, (D/D0) 2 was approximately unchanged at 1.0 and similarity degree (SD) was higher than 97%. Temperature growth rate (TGR) decreased first quickly and then slowly. After the auto-ignition of BUT00, (D/D0) 2 sharply decreased and SD was in the range of 90-97%. The flame heating led to the increase of TGR. For BUT50, obvious fluctuations were found in (D/D0) 2 , SD and TGD. The SD of BUT50 was generally lower than 97%. The (D/D0) 2 of BUT50 included transient heating, fluctuation evaporation and equilibrium evaporation phases. Some characteristic parameters were deterministic although (D/D0) 2 in fluctuation evaporation phase was a non-deterministic process.

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Combustion characteristics of butanol isomers in multiphase droplet configurations

Cited by 23 publications

References 59 publications

A Reduced Kinetic Mechanism for the Combustion of n-Butanol

A Reduced Kinetic Mechanism for the Combustion of n-Butanol

Burning of Algae-Derived Biofuel Droplets and Their Mixtures with Jet Fuel

Experimental study on combustion characteristics of an n-butanol-biodiesel droplet

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