Alternative Diesel Fuel: Microemulsion Phase Behavior and Combustion Properties

Kayali, Ibrahim; Karaeen, Mohammad; Ahmed, Wisam; Qamhieh, Khawla; Olsson, Ulf

doi:10.1080/01932691.2015.1071267

Cited by 12 publications

(11 citation statements)

References 10 publications

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“…6 In the study of MFs, a single-phase region rich in oil (diesel fuel in our case) is of the most considerable interest. The fraction of water in such compositions should normally be about 20−30%, 12 while the fraction of surfactants (emulsifier), as the most costly component, should be minimal. Thus, in this study, we research a region limited by the maximum fraction of water (30−35%) and emulsifier (about 40%); the maximum DF/W ratio is 98:2.…”

Section: Resultsmentioning

confidence: 99%

“…19−21 Microemulsion fuels (MFs) decrease the temperature of exhaust gases by 20−60% and cut down the emission of solid particles by 40−77% and of nitrogen oxides and carbon monoxide by 70−75%. 11,12,22 The increasing interest in water-containing diesel fuels is explained by the fact that adding water minimizes sooting due to the so-called microexplosions that eventually increase the efficiency of fuel− air mixture and overall combustion. 23,24 Another benefit of water-in-diesel microemulsions is that they can be used in diesel engines and power facilities without major modifications of fuel feeder systems, as opposed to the method of direct injection of water into the combustion chamber.…”

Section: Introductionmentioning

confidence: 99%

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Properties and Phase Behavior of Water-in-Diesel Microemulsion Fuels Stabilized by Nonionic Surfactants in Combination with Aliphatic Alcohol

et al. 2020

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We investigate the properties and phase behavior of the water−diesel fuel−Neonol AF 9-6/2-ethylhexanol system, which is regarded as a promising microemulsion fuel. A pseudoternary diagram of the system has been obtained. In the diesel fuel/ water (DF/W) ratio ranging from 98:2 to 50:50 and the emulsifier concentration of 8−40 vol %, a region of microemulsions has been distinguished, generating particular interest as an alternative fuel. In the region under study, a reverse micellar phase L 2 has existed predominantly. Fish-cut diagrams have been obtained for the DF/W ratios in the emulsifier concentration−temperature coordinates. An increase in the water fraction in microemulsions significantly has narrowed the range of their stability. The critical changes of microemulsion properties have been identified using the fish-cut diagrams. We have established the empirical relationship among the phase inversion temperature, the emulsifier concentration in the phase inversion point, and the water fraction in microemulsions.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Properties and Phase Behavior of Water-in-Diesel Microemulsion Fuels Stabilized by Nonionic Surfactants in Combination with Aliphatic Alcohol

et al. 2020

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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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“…Such liquids can remain in a single-phase state for a long time. Moreover, there are studies demonstrating the applicability of these microemulsions as an alternative more ecologically friendly fuel for use in various diesel engines [4,5]. However, the WDME stability control in conditions of a fluctuating environment temperature is almost unexplored.…”

Section: Introductionmentioning

confidence: 99%

Diesel Microemulsion Fuel Resistant to Low-temperature Conditions: Study of Thermal Stability and Breakup

Ashihmin¹,

Piskunov²,

Yanovsky³

2019

Proceedings of the 4th World Congress on Momentum, Heat and Mass Transfer

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The study was performed by using the alternative fuel prepared by the authorswater-in-diesel or ammonium acetate brinein-diesel microemulsions (WDME or BDME) stabilized by a non-ionic surfactant and various alcohols with a carbon chain length from C5 to C9 as co-surfactants. The study provides results on thermal stability of the fuel mentioned and a breakup of its drops during the impact onto a horizontal heated wall. The processes under study are crucial for developing advanced fuel technologies intended to reach conditions of the enhanced fuel vaporization, ignition, and combustion inside combustion chambers of various IC-engines and power generation systems. Learning of the thermal stability involves several ways for controlling temperature ranges of the prepared fuel existence. Among of them are a utilization of the ammonium acetate brines as a dispersed phase, as well as alcohols (hexanol-1, 2ethylhexanol, nonanol-1) as a co-surfactant when stabilizing microemulsions, a variation of the co-surfactant fraction in a surfactant/cosurfactant mixture (emulsifier), as well as the content of the dispersed phase relative to the continuous one. By using these ways we succeeded in fabricating the microemulsion fuel samples stable to phase separation in a temperature range from about-20°С to +60°С. For physical modeling of drop impingement of the fabricated fuels onto heated surfaces of a combustion chamber, we investigated hydrodynamic regimes of single drop interaction with a horizontal wall. In addition, regime maps were plotted, and the determining relationships between inertia, viscosity and surface tension forces were established. The study presents critical Weber and Reynolds numbers characterizing the thermal breakup/rebound transition. An application of the alternative fuels is of the great interest because it is possible to enhance considerably an explosive breakup of drops in combustion chambers due to low-boiling component vaporization. Such an effect enables a significant increase in fuel burnout and the reduction of environmentally harmful emissions.

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Alternative Diesel Fuel: Microemulsion Phase Behavior and Combustion Properties

Cited by 12 publications

References 10 publications

Properties and Phase Behavior of Water-in-Diesel Microemulsion Fuels Stabilized by Nonionic Surfactants in Combination with Aliphatic Alcohol

Properties and Phase Behavior of Water-in-Diesel Microemulsion Fuels Stabilized by Nonionic Surfactants in Combination with Aliphatic Alcohol

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

Diesel Microemulsion Fuel Resistant to Low-temperature Conditions: Study of Thermal Stability and Breakup

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