Effect of process parameters on bitumen emulsions

Gingras, Jean-Philippe; Tanguy, Philippe A.; Mariotti, Sophie; Chaverot, P

doi:10.1016/j.cep.2005.01.003

Cited by 63 publications

(44 citation statements)

References 21 publications

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“…Emulsions produced at 14000 rpm showed a greater polydispersity than at 22000 rpm (Figure 6), which may be related to the non-uniformity of shear distribution within the emulsion due to the high viscosity of the continuous phase. On the other hand, the higher rotation velocity promoted the decrease of d 32 (Figure 6), validating a well-known trend for emulsions (Gingras et al, 2005;Darine et al, 2011). The rotation speed showed little influence on the viscosity of the emulsions (Table 3).…”

Section: Discussionsupporting

confidence: 55%

Interfacial Energy During the Emulsification of Water-in-Heavy Crude Oil Emulsions

Karcher

Perrechil

Bannwart

2015

Braz. J. Chem. Eng.

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-The aim of this study was to investigate the interfacial energy involved in the production of water-in-oil (W/O) emulsions composed of water and a Brazilian heavy crude oil. For such purpose an experimental set-up was developed to measure the different energy terms involved in the emulsification process. W/O emulsions containing different water volume fractions (0.1, 0.25 and 0.4) were prepared in a batch calorimeter by using a high-shear rotating homogenizer at two distinct rotation speeds (14000 and 22000 rpm). The results showed that the energy dissipated as heat represented around 80% of the energy transferred to the emulsion, while around 20% contributed to the internal energy. Only a very small fraction of the energy (0.02 -0.06%) was stored in the water-oil interface. The results demonstrated that the high energy dissipation contributes to the kinetic stability of the W/O emulsions.

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Section: Discussionsupporting

confidence: 55%

Interfacial Energy During the Emulsification of Water-in-Heavy Crude Oil Emulsions

Karcher

Perrechil

Bannwart

2015

Braz. J. Chem. Eng.

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“…In-line rotor-stator studies on emulsification are scarce but include work by Averbukh et al (1988) and more recently by Thapar (2004) and Gingras et al (2005). Averbukh et al (1988) provides an expression correlating drop size with various terms such as dispersed phase volume fraction, interfacial tension, flow rate, shear gap, continuous phase viscosity and rotor speed; however, a description of this study is not clear.…”

Section: Introductionmentioning

confidence: 94%

Droplet break-up by in-line Silverson rotor–stator mixer

Hall

Cooke

El‐Hamouz

et al. 2011

Chemical Engineering Science

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“…The optimal formulation contains a first small size of about 1 µm and a second size of about 5 µm with a proportion of are obtained and emulsions have no storage stability. Moreover, the droplet size obtained by the traditional method is between 5-10 microns; small droplet sizes are very difficult to obtain [18,19]. Obviously, we could consider that the size of 5-10 microns is a small droplet size, but in this paper, we will further differentiate the necessity of different sizes.…”

Section: Introductionmentioning

confidence: 99%

Storage Stability of Bimodal Emulsions vs. Monomodal Emulsions

Querol¹,

Barreneche

Cabeza

2017

Applied Sciences

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Storage stability is a very important parameter that has to be considered in the formulation of asphalt emulsions. When monomodal emulsions are formulated, Stokes' law is fulfilled, therefore the higher the viscosity the less sedimentation, or the lower average droplet size the less sedimentation. But when bimodal emulsions are formulated, this rule does not apply. In this paper, two types of different emulsions are formulated: monomodal emulsions and bimodal emulsions. Bimodal emulsions are a combination of one large bitumen size and a small one. For this study, hard penetration bitumens were used, B35/50 and B15/25, because they are the most difficult bitumen to emulsify and, consequently, the worst sedimentation values are expected. Once the emulsions are manufactured, they are diluted to a bitumen rate concentration of 60% and 70%. Results show that bimodal emulsions, although having lower viscosity than their monomodal counterparts, have higher storage stability.

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Effect of process parameters on bitumen emulsions

Cited by 63 publications

References 21 publications

Interfacial Energy During the Emulsification of Water-in-Heavy Crude Oil Emulsions

Interfacial Energy During the Emulsification of Water-in-Heavy Crude Oil Emulsions

Droplet break-up by in-line Silverson rotor–stator mixer

Storage Stability of Bimodal Emulsions vs. Monomodal Emulsions

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