Interpretation of Focused Beam Reflectance Measurement (FBRM) Data via Simulated Crystallization

Yu, Zai Qun; Chow, Pui Shan; Tan, Reginald B. H.

doi:10.1021/op800063n

Cited by 52 publications

(49 citation statements)

References 28 publications

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“…In previous works [7][8][9][21][22][23]] the values of L min and L max were estimated from suitable measurements. However, the technique of estimating L min and L max directly from the bin boundaries of the CLD histogram using a moving window technique has been demonstrated to yield more accurate results [6].…”

Section: Modelling Chord Length Distributionmentioning

confidence: 99%

Integration of in situ imaging and chord length distribution measurements for estimation of particle size and shape

Agimelen

Jawor-Baczynska

McGinty

et al. 2016

Chemical Engineering Science

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Efficient processing of particulate products across various manufacturing steps requires that particles possess desired attributes such as size and shape. Controlling the particle production process to obtain required attributes will be greatly facilitated using robust algorithms providing the size and shape information of the particles from in situ measurements. However, obtaining particle size and shape information in situ during manufacturing has been a big challenge. This is because the problem of estimating particle size and shape (aspect ratio) from signals provided by in-line measuring tools is often ill posed, and therefore it calls for appropriate constraints to be imposed on the problem. One way to constrain uncertainty in estimation of particle size and shape from in-line measurements is to combine data from different measurements such as chord length distribution (CLD) and imaging. This paper presents two different methods for combining imaging and CLD data obtained with in-line tools in order to get reliable estimates of particle size distribution and aspect ratio, where the imaging data is used to constrain the search space for an aspect ratio from the CLD data

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Section: Modelling Chord Length Distributionmentioning

confidence: 99%

Integration of in situ imaging and chord length distribution measurements for estimation of particle size and shape

Agimelen

Jawor-Baczynska

McGinty

et al. 2016

Chemical Engineering Science

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“…The crystal nucleation was determined by the observation on particle counts and mean particle sizes using the FBRM. The information of total particle counts can be directly related to nucleation (Yu et al, 2008). Crystal counts were categorised into five classes: 1-5 µm (extra small crystal, XSc), 10-23 µm (small crystal, Sc), 29-86 µm (medium crystal, Mc), 100-251 µm (large crystal, Lc) and 293-1000 µm (extra large crystal, XLc).…”

Section: Crystal Size Distribution By Fbrmmentioning

confidence: 99%

The Effects of Polyglycerol Esters on Palm Olein Fractionation

Hao¹

2019

JOPR

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This study was undertaken to investigate the effects of adding 0.1% (w/w)-0.9% (w/w) polyglycerol esters (PGE) on palm olein fractionation based on crystal nucleation, crystal growth and product quality aspects. Palm olein (IV 56) with PGE additives was subjected to crystallisation at a temperature of 13°C for 335 min. The crystal nucleation and its growth were monitored using focused beam reflectance measurement (FBRM) technique, during which the in-line changes of crystal size distribution during the process were analysed. The fractionated products were analysed for their iodine value (IV) and triacylglycerol (TAG) composition. The FBRM results showed that the PGE promoted crystal nucleation coupled with reduced formation of undesired large crystals during the crystallisation stage. The product analysis also showed that the PGE discouraged the formation of olein entrainment in the solid fraction but promoted the formation of 1, 3-dipalmitoyl-2-oleoyl-glycerol (POP) content in the solid fraction. In addition, PGE also slowed the formation of 1-palmitoyl-2,3-dioleoy-glycerol (POO). The optimal dosage that offered best performance was 0.3% (w/w) PGE which gave the most medium sized crystals and best palm mid fraction product with lowest IV and highest content of POP. These results implied that PGE is a nucleation enhancing and crystal growth retarding additive in palm olein crystallisation at 0.3% (w/w) dosage.

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“…One should therefore convert the measured CLD to its corresponding DSD. Methods were discussed to transform the measured chord length distribution into a size (diameter) distribution [ 91 – 94 ]. Another study had shown that the FBRM tended to undersize the droplets in emulsion [ 95 ].…”

Section: Application Of Fiber-optical Probes In Multiphase Reactorsmentioning

confidence: 99%

Fiber-Optical Sensors: Basics and Applications in Multiphase Reactors

Yanɡ

Yang

et al. 2012

Sensors

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This work presents a brief introduction on the basics of fiber-optical sensors and an overview focused on the applications to measurements in multiphase reactors. The most commonly principle utilized is laser back scattering, which is also the foundation for almost all current probes used in multiphase reactors. The fiber-optical probe techniques in two-phase reactors are more developed than those in three-phase reactors. There are many studies on the measurement of gas holdup using fiber-optical probes in three-phase fluidized beds, but negative interference of particles on probe function was less studied. The interactions between solids and probe tips were less studied because glass beads etc. were always used as the solid phase. The vision probes may be the most promising for simultaneous measurements of gas dispersion and solids suspension in three-phase reactors. Thus, the following techniques of the fiber-optical probes in multiphase reactors should be developed further: (1) online measuring techniques under nearly industrial operating conditions; (2) corresponding signal data processing techniques; (3) joint application with other measuring techniques.

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Interpretation of Focused Beam Reflectance Measurement (FBRM) Data via Simulated Crystallization

Cited by 52 publications

References 28 publications

Integration of in situ imaging and chord length distribution measurements for estimation of particle size and shape

Integration of in situ imaging and chord length distribution measurements for estimation of particle size and shape

The Effects of Polyglycerol Esters on Palm Olein Fractionation

Fiber-Optical Sensors: Basics and Applications in Multiphase Reactors

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