Effect of ethanol fuel additive on diesel emissions.

Cole, R. L.; Poola, Ramesh B.; Sekar, R.; Schaus, J.E.; McPartlin, P.

doi:10.2172/786919

Cited by 8 publications

(9 citation statements)

References 3 publications

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“…Among all of the fuel additives, ethanol displayed the least promoting performance because of the existence of C 3 species, while in other additive systems, there were only C 0 , C 1 , and C 2 species. The addition of fuel additives in the fuel combustion system could reduce the content of CO, which is in accordance with experimental results. ,, CO, CO 2 , H 2 O, and H 2 were the products of higher percentage, and these products are further discussed.…”

Section: Resultssupporting

confidence: 86%

“…Ethanol, butanol, dimethyl carbonate (DMC), dibutyl carbonate (DBC), methyl tert -butyl ether (MTBE), and tri- tert amyl glycerol ether (TTAG) have attracted much attention among hydrocarbon additives. Ethanol , has been proven to reduce particulate matter and CO emissions but presents an obvious ignition delay. Butanol has been proven to increase the brake thermal efficiency and decrease smoke emissions, and the formation of carbonyl compounds were inhibited. , DMC and DBC are considered options for meeting the oxygenate specification on gasoline.…”

Section: Introductionmentioning

confidence: 99%

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Combustion Mechanisms and Kinetics of Fuel Additives: A ReaxFF Molecular Simulation

2018

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Fuel additives are widely used as octane number improvers, oxygenates, emission depressors, and corrosion inhibitors to promote combustion processes of liquid fuel. In this work, six kinds of fuel additives, including ethanol, butanol, dimethyl carbonate, dibutyl carbonate, methyl tert-butyl ether, and tri-tert amyl glycerol ether, were studied by ReaxFF molecular dynamics simulations. The bond dissociation reactions were found to be more dominant at the early stage than oxidation reactions, which means the unimolecular reactions were the main pathways of primary reactions in hydrocarbon combustion. The rate constants of primary reactions of ethanol combustion were much smaller than those of other systems, which were in good agreement with the product distribution analysis and previous work. The main reaction pathway and relative rate constants for all systems were evaluated. Four kinds of main radicals, including ·CH3, ··CH2, ·OH, and ·HO2, were detected, and the number variation with time are presented. The number of ·OH radicals was the largest among those four radicals, and it was found to gradually increase with time except for ether systems; the number of ·CH3 and ··CH2 radicals sharply increased first and then gradually decreased. Hopefully, the results obtained in this work will be helpful to future design and screening of new fuel additives.

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Section: Resultssupporting

confidence: 86%

Section: Introductionmentioning

confidence: 99%

Combustion Mechanisms and Kinetics of Fuel Additives: A ReaxFF Molecular Simulation

2018

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“…The researchers reported a small (2% to 5%) net NO x reduction -which is lost in the noise because some rpm/load combinations actually increased NO x (a finding duplicated during Volkswagen engine testing by Automotive Testing Laboratory and Argonne National Laboratory [Cole et al 2000]), as well as a 20% to 25% CO reduction and a 25% PM reduction (when looking at the actual representative segments of the engine map on which the unit was tested).…”

Section: Agricultural Tractors and Trucksmentioning

confidence: 99%

“…One source is the testing conducted at Automotive Testing Laboratory and overseen by Argonne on the Volkswagen turbocharged direct-injection diesel light-duty engine (Cole et al 2000). Also, the Chicago Transit Authority, in conjunction with SwRI, has conducted limited testing on buses fueled by ED15 (Marek and Evanoff 2001).…”

Section: Transit Buses On E-diesel Blendsmentioning

confidence: 99%

“…Based on the limited results from Cole et al (2000), we used the following modifications to standard diesel transit bus emission rates in MOBILE6 (Table 13), the latest version of EPA's MOBILE model for estimating vehicle emission factors (EPA 2002b). Our decision regarding appropriate modifications to fuel consumption rates was not so straightforward.…”

Section: Transit Buses On E-diesel Blendsmentioning

confidence: 99%

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Fuel-Cycle energy and emission impacts of ethanol-diesel blends in urban buses and farming tractors.

Wang¹,

Saricks²,

Lee³

2003

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The effect of ethanol blended diesel fuels on emissions from a diesel engine

Shuai

Wang

et al. 2003

Atmospheric Environment

335

118

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The addition of ethanol to diesel fuel simultaneously decreases cetane number, high heating value, aromatics fractions and kinematic viscosity of ethanol blended diesel fuels and changes distillation temperatures. An additive used to keep the blends homogenous and stable, and an ignition improver, which can enhance cetane number of the blends, have favorable effects on the physicochemical properties related to ignition and combustion of the blends with 10% and 30% ethanol by volume.The emission characteristics of five fuels were conducted on a diesel engine. At high loads, the blends reduce smoke significantly with a small penalty on CO, acetaldehyde and unburned ethanol emissions compared to diesel fuel. NO x and CO 2 emissions of the blends are decreased somewhat. At low loads, the blends have slight effects on smoke reduction due to overall leaner mixture. With the aid of additive and ignition improver, CO, unburned ethanol and acetaldehyde emissions of the blends can be decreased moderately, even total hydrocarbon emissions are less than those of diesel fuel. The results indicate the potential of diesel reformation for clean combustion in diesel engines. r

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Effect of ethanol fuel additive on diesel emissions.

Cited by 8 publications

References 3 publications

Combustion Mechanisms and Kinetics of Fuel Additives: A ReaxFF Molecular Simulation

Combustion Mechanisms and Kinetics of Fuel Additives: A ReaxFF Molecular Simulation

Fuel-Cycle energy and emission impacts of ethanol-diesel blends in urban buses and farming tractors.

The effect of ethanol blended diesel fuels on emissions from a diesel engine

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