Particle size distribution of TBPB hydrates by focused beam reflectance measurement (FBRM) for secondary refrigeration application

Clain, Pascal; Ndoye, Fatou Toutie; Delahaye, Anthony; Fournaison, Laurence; Lin, Wei; Dalmazzone, Didier

doi:10.1016/j.ijrefrig.2014.10.016

Cited by 28 publications

(7 citation statements)

References 50 publications

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“…When the beam intersects a particle, the scattered light is reflected back to the probe. A photodetector in the probe generates a pulse that represents the two points at the edge of the particle, and the chord length is determined from the pulse width and the laser velocity. , …”

Section: Methodsmentioning

confidence: 99%

“…A photodetector in the probe generates a pulse that represents the two points at the edge of the particle, and the chord length is determined from the pulse width and the laser velocity. 31,32 The primary chord length distribution is constructed from the chord length measurements of hundreds of particles. The size range is divided into Cartesian or logarithmic intervals (bins), and the number count for each bin is reported.…”

Section: Preparation Of Asphaltene Aggregatesmentioning

confidence: 99%

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Nature of Asphaltene Aggregates

Duran

Casas

et al. 2018

Energy Fuels

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The size and fractal dimension of asphaltene aggregates were investigated for two Western Canadian bitumens diluted with n-heptane at concentrations above the onset of precipitation. Asphaltene aggregate size distributions were measured over time using focused beam reflectance and micrographic methods in a series of batch experiments at different n-heptane contents and shear rates. The fractal dimensions of the aggregates were determined from the volume of the settled aggregates. The asphaltenes formed approximately log-normal size distributions with volume mean diameters of tens to hundreds of micrometers, depending mainly upon the n-heptane content. The distributions were established in less time than the first measurement could be obtained (about 30 s) and changed relatively little afterward. The average aggregate size increased with an increasing n-heptane content but reached a plateau value at 70–80 wt % n-heptane. The fractal dimension reached a maximum at a similar n-heptane content. Micrographic images and fractal dimensions indicated that, near the onset of precipitation, compact linear and planar aggregate structures dominated. At higher n-heptane contents up to approximately 75 wt % n-heptane, the aggregates remained compact but became more three-dimensional. At higher n-heptane contents, larger, looser structures were formed that could be broken under sufficient shear but did not reaggregate. The results were consistent with simultaneous nucleation, growth, and flocculation processes, where the precipitating material was initially sticky but lost its stickiness over time. The loss in stickiness was confirmed with surface force adhesion measurements.

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Section: Methodsmentioning

confidence: 99%

Section: Preparation Of Asphaltene Aggregatesmentioning

confidence: 99%

Nature of Asphaltene Aggregates

Duran

Casas

et al. 2018

Energy Fuels

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“…An independent device with METTLER TOLEDO FBRM ® D600 probe (focused beam reflectance method) was used to obtain the chord length distribution (CLD) of water droplets in the emulsions . CLD is just a straight line between two points on the edge of a droplet/particle scanned by a highly focused laser beam through the sapphire window of the probe, which can be converted to the particle‐size distribution (PSD) of droplets/particles …”

Section: Methodsmentioning

confidence: 99%

An investigation on gas hydrate formation and slurry viscosity in the presence of wax crystals

et al. 2018

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Clarifying the interaction effect between hydrate and wax is of great significance to guarantee operation safety in deep water petroleum fields. Experiments in a high-pressure hydrate slurry rheological measurement system were carried out to investigate hydrate formation and slurry viscosity in the presence of wax crystals. Results indicate that the presence of wax crystals can prolong hydrate nucleation induction time, and its influence on hydrate growth depends on multiple factors. Higher stirring rate can obviously promote hydrate growth rate, while its influence on hydrate nucleation induction time is complicated. Higher initial pressure will promote hydrate formation. Gas hydrate slurry shows a shearthinning behavior, and slurry viscosity increases with the increase of wax content and initial pressure. A semiempirical viscosity model showing a well-fitting is established for hydrate slurry with wax crystals by considering the aggregation and breakage of hydrate particles, wax crystals, and water droplets.

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“…The square-weighted mean chord length is equivalent to the Sauter mean diameter [26][27][28]. The results of a particle size analysis are presented as a square-weighted frequency distribution and calculated as…”

Section: Particle Size and Shape Characterizationmentioning

confidence: 99%

One way of representing the size and shape of biomass particles in combustion modeling

Trubetskaya

Beckmann²,

Wadenbäck

et al. 2017

Fuel

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a b s t r a c tThis study aims to provide a geometrical description of biomass particles that can be used in combustion models. The particle size of wood and herbaceous biomass was compared using light microscope, 2D dynamic imaging, laser diffraction, sieve analysis and focused beam reflectance measurement. The results from light microscope and 2D dynamic imaging analysis were compared and it showed that the data on particle width, measured by these two techniques, were identical. Indeed, 2D dynamic imaging was found to be the most convenient particle characterization method, providing information on both the shape and the external surface area. Importantly, a way to quantify all three dimensions of biomass particles has been established. It was recommended to represent a biomass particle in combustion models as an infinite cylinder with the volume-to-surface ratio (V/A) measured using 2D dynamic imaging.

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Particle size distribution of TBPB hydrates by focused beam reflectance measurement (FBRM) for secondary refrigeration application

Cited by 28 publications

References 50 publications

Nature of Asphaltene Aggregates

Nature of Asphaltene Aggregates

An investigation on gas hydrate formation and slurry viscosity in the presence of wax crystals

One way of representing the size and shape of biomass particles in combustion modeling

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