The combined effect of water and nanoparticles on diesel engine powered by biodiesel and its blends with diesel: A review

Jin, Chuanhao; Wei, Jiangjun

doi:10.1016/j.fuel.2023.127940

Cited by 44 publications

(18 citation statements)

References 133 publications

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“…In this regard, it is well-known that adding water to diesel oil to form a fuel emulsion is advantageous in providing diesel engines more power and less pollution from unburnt hydrocarbons and NO x . , A number of reasons have been advanced to explain this fact: , the reduction of the maximum temperature of the combustion chamber that can reduce NO x formation owing to the large latent heat for water evaporation, the accelerated oxidation of soot by reaction with water, and microexplosions of evaporating water droplets that can increase fuel-air mixing and reduce soot formation. We hypothesize that the ability of water microdroplets to transform long-chain hydrocarbons to short-chain hydrocarbons and to produce H 2 might be another important contributing factor.…”

Section: Introductionmentioning

confidence: 99%

Hydrocarbon Degradation by Contact with Anoxic Water Microdroplets

Chen,

Xia,

Zhang

et al. 2023

J. Am. Chem. Soc.

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Oils are hydrophobic, but their degradation is frequently found to be accelerated in the presence of water microdroplets. The direct chemical consequences of water−oil contact have long been overlooked. We show that aqueous microdroplets in emulsified water− hexadecane (C 16 H 34 ) mixtures can spontaneously produce CO 2 , •H, H 2 , and short-chain hydrocarbons (mainly C 1 and C 2 ) as detected by gas chromatography, electron paramagnetic resonance spectroscopy, and mass spectrometry. This reaction results from contact electrification at the water−oil microdroplet interface, in which reactive oxygen species are produced, such as hydrated hydroxyl radicals and hydrogen peroxide. We also find that the H 2 originates from the water microdroplet and not the hydrocarbon it contacts. These observations highlight the potential of interfacial contact electrification to produce new chemistry.

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Section: Introductionmentioning

confidence: 99%

Hydrocarbon Degradation by Contact with Anoxic Water Microdroplets

Chen,

Xia,

Zhang

et al. 2023

J. Am. Chem. Soc.

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“…The A/F ratio and engine load circumstances have an impact on HC. When more fuel was allowed into the combustion chamber at full load, the quench zone increased and fuel was deposited in crevice areas, leading to excessive HC production. , Further, HC for the emulsified blends of B20CuO25, B20CuO50, B20CuO75, and B20CuO100 was found to be 84, 81, 74, and 80 ppm, respectively. B20CuO75 was revealed to have 16.21% lower HC emissions than B20 without nanoadditive and 9.76% lower than diesel.…”

Section: Resultsmentioning

confidence: 98%

Investigation into the Ideal Concoction for Performance and Emissions Enhancement of Jatropha Biodiesel-Diesel with CuO Nanoparticles Using Response Surface Methodology

Ramachandran,

Krishnaiah,

Venkatesan

et al. 2023

ACS Omega

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The present work covers the preparation of biodiesel from jatropha oil through the transesterification process followed by its characterization, and furthermore, performance and emission analyses were done in terms of blending biodiesel with fossil diesel and CuO nanoparticles. Jatropha biodiesel blends (B10, B20, and B30) were chosen for this preliminary investigation based on the observation that B20 outperformed other blends. Next stage B20 with copper oxide (CuO) nanoparticle concentrations of 25, 50, 75, and 50 ppm are used to examine the performance and emission characteristics of a constant speed single cylinder, 4stroke, 3.5 kW compression ignition (CI) engine. Finally, The response surface methodology (RSM) was utilized to determine the optimal nanoparticle concentration for B20. The results revealed that the blend of B20 with 80 ppm nanoparticles had the highest desirability (0.9732), and the developed RSM model was able to predict engine responses with a mean absolute percentage error (MAPE) of 3.113%. A confirmation test with an error in prediction of less than 5% verified the model's adequacy. When comparing optimized B20CuO80 to diesel, brake specific energy consumption (BSEC) increased by 8.49% and brake thermal efficiency (BTE) was lowered by 3.34%. Hydrocarbon (HC), carbon monoxide (CO), carbon dioxide (CO 2 ), nitrogen oxide (NOx), and smoke emissions were reduced by 3.66% and 2.88%, 4.78%, 22.9%, and 20.54%, respectively, at 80% load. As a result, the B20 blend with nanoparticle concentrations of 80 ppm may be used in current diesel engines without engine modification.

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“…While CO emissions originate from incomplete combustion, UBHC emissions emanate from unburnt fuel, which does not combust. 68 The formation of both of these regulated pollutants is reported to be higher with emulsified fuels primarily due to the overall decrease in the combustion temperature, owing to presence of water. Contrasting results have also been reported due to the formation of OH radicals as a result of the presence of water, which oxidize CO and other hydrocarbons, leading to lower emissions.…”

Section: ■ Current Status and Challengesmentioning

confidence: 99%

Emulsions as Viable Alternative to Conventional Fuels: Current Status and Challenges

Rastogi,

Kaisare,

Basavaraj

2024

Langmuir

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The combined effect of water and nanoparticles on diesel engine powered by biodiesel and its blends with diesel: A review

Cited by 44 publications

References 133 publications

Hydrocarbon Degradation by Contact with Anoxic Water Microdroplets

Hydrocarbon Degradation by Contact with Anoxic Water Microdroplets

Investigation into the Ideal Concoction for Performance and Emissions Enhancement of Jatropha Biodiesel-Diesel with CuO Nanoparticles Using Response Surface Methodology

Emulsions as Viable Alternative to Conventional Fuels: Current Status and Challenges

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