Characterization of emulsions and suspensions by video image analysis

Novalès, Bruno; Papineau, Patrice; Sire, A.; Axelos, Monique

doi:10.1016/s0927-7757(03)00102-x

Cited by 25 publications

(19 citation statements)

References 11 publications

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“…These techniques have been used in different emulsion studies to determine the mean diameter and obtain droplet size distribution of water in crude oil emulsion [93][94][95], and also to investigate the coalescence of water in crude oil emulsion [96].…”

Section: Light Scattering and Diffractionmentioning

confidence: 99%

Stability Proxies for Water-in-Oil Emulsions and Implications in Aqueous-based Enhanced Oil Recovery

2011

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Several researchers have proposed that mobility control mechanisms can positively contribute to oil recovery in the case of emulsions generated in Enhanced-Oil Recovery (EOR) operations. Chemical EOR techniques that use alkaline components or/and surfactants are known to produce undesirable emulsions that create operational problems and are difficult to break. Other water-based methods have been less studied in this sense. EOR processes such as polymer flooding and LoSal TM injection require adjustments of water chemistry, mainly by lowering the ionic strength of the solution or by decreasing hardness. The decreased ionic strength of EOR solutions can give rise to more stable water-in-oil emulsions, which are speculated to improve mobility ratio between the injectant and the displaced oil. The first step toward understanding the connection between the emulsions and EOR mechanisms is to show that EOR conditions, such as salinity and hardness requirements, among others, are conducive to stabilizing emulsions. In order to do this, adequate stability proxies are required. This paper reviews commonly used emulsion stability proxies and explains the advantages and disadvantage of methods reviewed. This paper also reviews aqueous-based EOR processes with focus on heavy oil to contextualize in-situ emulsion stabilization conditions. This context sets the basis for comparison of emulsion stability proxies.

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Section: Light Scattering and Diffractionmentioning

confidence: 99%

Stability Proxies for Water-in-Oil Emulsions and Implications in Aqueous-based Enhanced Oil Recovery

2011

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“…The variation in the grayscale intensity allows the detection of changes between two consecutive images, which are often an indication of destabilization events occurring in the emulsion. 16 To obtain digital images for grayscale profiles over time, emulsions were placed in front of a digital camera (PowerShot A480, Cannon) and images were recorded every 30 min for the first 24 h and every 3 h for the rest of the 5-day experiment. Images recorded were stored for subsequent analysis of emulsion stability.…”

Section: Methodsmentioning

confidence: 99%

“…Overall, optical observation using microscopic images provided Supporting Information regarding the early destabilization of emulsions and particle size distributions. Emulsion stability can vary over time because droplets of different sizes rise at different speeds 16 and the diameter of droplets can increase by droplet interaction. For this reason, the analysis of the distribution and dimension of droplets can provide an insight into the main instability mechanism and corroborate the results obtained from a visual examination.…”

Section: Droplet Distributionmentioning

confidence: 99%

Evaluation of Bilgewater Emulsion Stability Using Nondestructive Analytical Methods

Diaz

Church

Willner

et al. 2020

Ind. Eng. Chem. Res.

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This study presents a systematic investigation of bilgewater emulsion characteristics using various in situ analytical methods, while assessing the effect of environmental parameters [e.g., ionic strength, suspended solids (SS), and temperature] on emulsion destabilization. The stabilizing properties of three emulsifiers [Triton X-100, B&B 3100, and sodium dodecyl sulfate (SDS)] were evaluated under various conditions over 5 days. Time-course visual observation, relative oil separation, droplet size distribution, and grayscale intensity profiles were used for the physical characterization of the emulsion samples. In particular, the grayscale intensity was found to be a useful technique for the rapid detection of emulsion separation using simple image analysis. Major findings on bilgewater emulsion stability in this study are as follows: (1) emulsion stability decreased with NaCl (ionic strength) addition and temperature increase, resulting in higher oil separation, (2) emulsions stabilized with B&B 3100 (commercial cleaner) were more stable than Triton X-100 and SDS (neat surfactants) at the equivalent critical micelle concentration, and (3) SSs particle size larger than the initial droplet size could promote the formation of larger emulsion droplets, thus increasing oil coalescence as corroborated by visual observation. Overall, this study highlighted a defined set of easy and rapid emulsion analytical methods, which provided significant information regarding bilgewater emulsion stability. These techniques demonstrated to be a rapid solution for the in situ characterization of bilgewater emulsions primarily in offshore locations lacking sophisticated equipment. These methods can be used for further investigation of other cleaning products found on ships and actual bilgewater samples to assist in the appropriate bilgewater treatment and management.

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“…Therefore, the hydroxy-fatty acids extracted from tomato fruit peels highlight good emulsifying properties in regard to other surfactants currently used in the industries. 26,27…”

Section: Emulsifying Propertiesmentioning

confidence: 99%

Interfacial properties of functionalized assemblies of hydroxy-fatty acid salts isolated from fruit tomato peels

et al. 2013

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Characterization of emulsions and suspensions by video image analysis

Cited by 25 publications

References 11 publications

Stability Proxies for Water-in-Oil Emulsions and Implications in Aqueous-based Enhanced Oil Recovery

Stability Proxies for Water-in-Oil Emulsions and Implications in Aqueous-based Enhanced Oil Recovery

Evaluation of Bilgewater Emulsion Stability Using Nondestructive Analytical Methods

Interfacial properties of functionalized assemblies of hydroxy-fatty acid salts isolated from fruit tomato peels

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