Thermal stability control of the water-in-diesel microemulsion fuel produced by using a nonionic surfactant combined with aliphatic alcohols

Ashihmin, Alexander; Piskunov, Maxim; Roisman, Ilia V.; Yanovsky, Vyacheslav

doi:10.1080/01932691.2019.1634583

Cited by 19 publications

(11 citation statements)

References 28 publications

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“…In the examined three-component system, it is necessary to study the effect of emulsifier on droplet disintegration characteristics, since the volume concentration of this component can be as high as 30-40% [23]. Therefore, the impact of this component on micro-emulsion rheology can be quite substantial.…”

Section: Effect Of Emulsifier Concentrationmentioning

confidence: 99%

“…In terms of secondary atomization of isolated fuel droplets, the authors of [13][14][15] aimed at developing the empirical models to predict the size, velocity, and amount of secondary droplets resulting from the collision of parent drops with non-heated dry surfaces. In the case of homogeneous single-component fuel droplets, the studies are quite detailed on the wall impact regimes, mechanisms, and disintegration criteria accounting for the heat exchange mode [16], unlike multi-component droplets containing a dispersed phase of another liquid, i.e., emulsion [17,18], micro-emulsion [19][20][21][22][23], or nano-emulsion [24]. Moreover, the studied processes become even more complicated because the saturation temperatures of the liquids in emulsions, micro-emulsions, and nano-emulsions may differ drastically.…”

Section: Introductionmentioning

confidence: 99%

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Secondary Atomization of a Biodiesel Micro-Emulsion Fuel Droplet Colliding with a Heated Wall

et al. 2020

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Using high-speed video recording, we establish the following regimes of hydrodynamic interaction of a biodiesel micro-emulsion fuel droplet with a heated wall: deposition (including drop spreading and receding), drop hydrodynamic breakup, and rebound. Collision regime maps are plotted using a set of dimensionless criteria: Weber number We = 470–1260, Ohnesorge number Oh = 0.146–0.192, and Reynolds number Re = 25–198. The scenarios of droplet hydrodynamic disintegration are studied for transient and film boiling. We also estimate the disintegration characteristics of a biodiesel micro-emulsion droplet (mean diameter of child droplets, their number, and evaporation surface area increase due to breakup). The study establishes the effect of water proportion on the micro-emulsion composition (8–16 vol.%), heating temperature (300–500 °C), droplet size (1.8–2.8 mm), droplet velocity (3–4 m/s), rheological properties of the examined compositions, and emulsifier concentration (10.45 vol.% and 20 vol.%) on the recorded characteristics. The results show that the initial liquid surface area can be increased 2–19 times. The paper analyzes ways to control the process. The hydrodynamic disintegration characteristics of a biodiesel micro-emulsion fuel droplet are compared using 2D and 3D recording.

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Section: Effect Of Emulsifier Concentrationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Secondary Atomization of a Biodiesel Micro-Emulsion Fuel Droplet Colliding with a Heated Wall

et al. 2020

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“…Higher in-cylinder temperature and availability of oxygen are responsible for the formation of Nox in compression ignition engines. Hence, water in biodiesel emulsions has been tested for increased thermal efficiency and a reduction in the formation of Nox [30][31][32][33][34][35]. There was a reduction of 32% in formation of Nox, a 7.4% reduction in smoke, and a 2.3% and 1% reduction in CO and hydrocarbon (HC) were reported when water emulsified pongamia biodiesel was used in a 4-S diesel engine [36].…”

Section: Hydrogen Additionmentioning

confidence: 99%

A Review of Performance-Enhancing Innovative Modifications in Biodiesel Engines

Khan

2020

Energies

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The ever-increasing demand for transport is sustained by internal combustion (IC) engines. The demand for transport energy is large and continuously increasing across the globe. Though there are few alternative options emerging that may eliminate the IC engine, they are in a developing stage, meaning the burden of transportation has to be borne by IC engines until at least the near future. Hence, IC engines continue to be the prime mechanism to sustain transportation in general. However, the scarcity of fossil fuels and its rising prices have forced nations to look for alternate fuels. Biodiesel has been emerged as the replacement of diesel as fuel for diesel engines. The use of biodiesel in the existing diesel engine is not that efficient when it is compared with diesel run engine. Therefore, the biodiesel engine must be suitably improved in its design and developments pertaining to the intake manifold, fuel injection system, combustion chamber and exhaust manifold to get the maximum power output, improved brake thermal efficiency with reduced fuel consumption and exhaust emissions that are compatible with international standards. This paper reviews the efforts put by different researchers in modifying the engine components and systems to develop a diesel engine run on biodiesel for better performance, progressive combustion and improved emissions.

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“…When 100 mM salt was added, the emulsions had the best stability [20]. Furthermore, the stability of fuel microemulsions has been investigated by Olsson et al [25,26], Dash et al [27,28] and Piskunov et al [29,30]. These investigations mainly focus on experimental analysis, which is not the mechanism that affects the factors of emulsion formation and stability.…”

Section: Introductionmentioning

confidence: 99%

DPD Simulation on the Transformation and Stability of O/W and W/O Microemulsions

Zhang

Wu³

et al. 2022

Molecules

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The dissipative particle dynamics simulation method is adopted to investigate the microemulsion systems prepared with surfactant (H1T1), oil (O) and water (W), which are expressed by coarse-grained models. Two topologies of O/W and W/O microemulsions are simulated with various oil and water ratios. Inverse W/O microemulsion transform to O/W microemulsion by decreasing the ratio of oil-water from 3:1 to 1:3. The stability of O/W and W/O microemulsion is controlled by shear rate, inorganic salt and the temperature, and the corresponding results are analyzed by the translucent three-dimensional structure, the mean interfacial tension and end-to-end distance of H1T1. The results show that W/O microemulsion is more stable than O/W microemulsion to resist higher inorganic salt concentration, shear rate and temperature. This investigation provides a powerful tool to predict the structure and the stability of various microemulsion systems, which is of great importance to developing new multifunctional microemulsions for multiple applications.

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Thermal stability control of the water-in-diesel microemulsion fuel produced by using a nonionic surfactant combined with aliphatic alcohols

Cited by 19 publications

References 28 publications

Secondary Atomization of a Biodiesel Micro-Emulsion Fuel Droplet Colliding with a Heated Wall

Secondary Atomization of a Biodiesel Micro-Emulsion Fuel Droplet Colliding with a Heated Wall

A Review of Performance-Enhancing Innovative Modifications in Biodiesel Engines

DPD Simulation on the Transformation and Stability of O/W and W/O Microemulsions

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