Combustion of heptane-in-water emulsion foamed with hydrogen-oxygen mixture

Kichatov, Boris; Korshunov, Alexey; Gubernov, Vladimir; Киверин, А. Д.; Yakovenko, I. S.

doi:10.1016/j.fuproc.2019.106230

Cited by 15 publications

(7 citation statements)

References 54 publications

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“…The combustible wet foam considered recently in [8] represents a two-phase medium consisting of gas bubbles of ∼200 µm diameter separated by thin films of an aqueous solution of a surfactant or oil-in-water emulsion [9]. The hydrogen-oxygen mixture is used as a foaming gas.…”

Section: Mathematical Model and Problem Setupmentioning

confidence: 99%

“…Recently Kichatov et al [7] introduced the foamed emulsion as a brand new type of complex fuel. Furthermore, Kichatov et al considered the aqueous foam bubbled with a hydrogen-oxygen mixture [8] and the oil-in-water emulsion foamed with a hydrogen-oxygen mixture [9]. In the case of the hydrogen addition, the intense dynamic processes were registered and interpreted as detonation onset.…”

Section: Introductionmentioning

confidence: 99%

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Numerical Modeling of Combustion and Detonation in Aqueous Foams

Киверин

Yakovenko

2021

Energies

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Combustible aqueous foams and foamed emulsions represent prospective energy carriers. This paper is devoted to the overview of model assumptions required for numerical simulations of combustion and detonation processes in aqueous foams. The basic mathematical model is proposed and used for the analysis of the combustion development in the wet aqueous foam containing bubbles filled with reactive gas. The numerical results agree with the recent experimental data on combustion and detonation in aqueous foams containing premixed hydrogen–oxygen. The obtained results allowed for distinguishing the mechanisms of flame acceleration, transition to detonation, detonation propagation, and decay.

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Section: Mathematical Model and Problem Setupmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Numerical Modeling of Combustion and Detonation in Aqueous Foams

Киверин

Yakovenko

2021

Energies

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“…More emulsifiers, proteins and hydrocolloids are needed to reduce fat crystals 22 . However, a low amount of surfactant alone is not sufficient to prevent undesired thermodynamic phenomena in aerated microstructures 23,24 . It has been found that when high levels of glycyrrhizic acid (40 g L −1 ) are used along with the formation of a multilayered complex at the liquid–liquid interface, a hydrogel system is created in the continuous phase.…”

Section: Introductionmentioning

confidence: 99%

“…22 However, a low amount of surfactant alone is not sufficient to prevent undesired thermodynamic phenomena in aerated microstructures. 23,24 It has been found that when high levels of glycyrrhizic acid (40 g L −1 ) are used along with the formation of a multilayered complex at the liquid-liquid interface, a hydrogel system is created in the continuous phase. This system effectively traps oil droplets and air bubbles, resulting in an ultra-stable emulsion foam with a high yield stress (32.40-286.90 Pa).…”

Section: Introductionmentioning

confidence: 99%

Bioactive foamulsion gels: a unique structure prepared with gellan gum and Acanthophyllum glandulosum extract

Sabeghi,

Varidi,

Nooshkam

2024

J Sci Food Agric

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BACKGROUNDFoamulsions have become increasingly popular in the food industry due to their ability to enhance the textural, sensory and health‐promoting properties of food products. This study was therefore aimed to design and prepare a novel gelled structure, foamulsion gel containing 0–600 g L−1 oil, with gellan gum (GG; 7, 10 and 13 g L−1) and saponin‐rich antioxidant Acanthophyllum glandulosum extract (AGE; 2, 6 and 10 g L−1).RESULTSThe interaction between components was confirmed by infrared spectroscopy. The overrun and porosity of the foamulsion gels increased with antioxidant AGE (1.30 times) and reduced with oil (up to ca 70% and 30%, respectively) and GG levels. The systems were highly stable, and no water or oil was released during the physical stability experiments. Microscopic images showed that the size of air cells was significantly larger than that of oil droplets. The foamulsion gels based on 13 g L−1 GG and 10 g L−1 AGE had markedly higher elastic (G′) and viscous (G′′) moduli than other samples, and exhibited an elastic and solid‐like behavior (G′ > G′′). The highest gel firmness was found in oil‐free sample, and the presence of oil resulted in a lower firmness induced by the larger size and lubrication effect of oil droplets.CONCLUSIONAs a result, the interactions between AGE, GG and oil could lead to the creation of new aerated structures known as bioactive foamulsion gels. These gels exhibit excellent foamability, stability and viscoelasticity and may find applications in the development of novel, healthy and low‐calorie aerated foods. © 2024 Society of Chemical Industry.

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“…1,2 Specifically, water-heptane emulsions have important applications in the field of ecologically clean fuel synthesis, the foam industry, etc. 3,4 Stabilization of an emulsion usually needs external compounds as emulsifiers, which reduce the interfacial energy of two immiscible liquids. In addition, an emulsifier's hydrophilic and lyophilic properties are the key factors that control the stabilization of emulsions.…”

Section: Introductionmentioning

confidence: 99%