Roughness effect on the overall growth rate of sucrose crystals

Ferreira, António; Faria, Nuno; Rocha, Fernando

doi:10.1016/j.jcrysgro.2007.11.031

Cited by 8 publications

(29 citation statements)

References 20 publications

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“…The growth rates obtained in the different crystallizers at 35 °C are very distinctive. This phenomenon was studied by Ferreira et al [32]. These authors explain this occurrence based on the different surface properties of the crystals.…”

Section: Crystallisation and Dissolutionmentioning

confidence: 89%

“…According to Ferreira et al [32] each experimental point obtained in fluidized bed crystallizer at different…”

Section: Impurity In Crystalsmentioning

confidence: 99%

“…The results are shown in figure 10. Because of slow surface healing [32,33] it is expected, during the batch crystallisation, that the impurity adsorption follows a specific curve predicted by Eq. 14, according to the crystal surface properties defined by the initial supersaturation of the system.…”

Section: Impurity In Crystalsmentioning

confidence: 99%

“…In a previous work [32] we presented the effect of crystal surface roughness on crystal growth rate of sucrose. The crystal roughness was characterized on a microscopic scale, and defined through the In the present work, CaCl 2 adsorption into the crystals was studied and the incorporated quantity measured at different temperatures and crystal surface roughnesses [32,33].…”

mentioning

confidence: 99%

“…The crystal roughness was characterized on a microscopic scale, and defined through the In the present work, CaCl 2 adsorption into the crystals was studied and the incorporated quantity measured at different temperatures and crystal surface roughnesses [32,33]. The impurity influence on the growth and dissolution rates was also studied.…”

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confidence: 99%

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The effect of crystal surface roughness on impurity adsorption

Ferreira

Faria²,

Rocha³

2009

Cryst. Res. Technol.

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The effect of crystal surface roughness on impurity adsorption was investigated in a fluidized bed crystallizer and in a batch crystallizer. The crystallisation of sucrose in pure and impure systems was the study subject. Calcium chloride was utilized as impurity in this work. The results show that the impurity adsorption is growth rate dependent and is strongly influenced by the crystal surface properties. Crystals with high surface roughness have lower impurity adsorption. Based on experimental evidences, a new theoretical model is proposed to quantify the surface roughness influence on the impurity adsorption, allowing, by operating at the more adequate supersaturation, to control the impurity transfer into crystals. The used impurity does not have a significant influence on the growth rates at the studied temperatures.

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Section: Crystallisation and Dissolutionmentioning

confidence: 89%

“…According to Ferreira et al [32] each experimental point obtained in fluidized bed crystallizer at different…”

Section: Impurity In Crystalsmentioning

confidence: 99%

Section: Impurity In Crystalsmentioning

confidence: 99%

mentioning

confidence: 99%

mentioning

confidence: 99%

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The effect of crystal surface roughness on impurity adsorption

Ferreira

Faria²,

Rocha³

2009

Cryst. Res. Technol.

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Growth Rate Measurements of Organic Crystals in a Cone‐Shaped Fluidized‐Bed Cell

et al. 2018

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Knowledge of crystal growth rates and the factors that affect these rates is often an essential prerequisite for designing industrial processes that yield a desired crystalline product. Herein, the effects of saturation temperature, supersaturation, and seed‐crystal size on the overall linear growth rate of L‐alanine were examined by using a cone‐shaped fluidized‐bed cell. For a systematic investigation, a “design of experiment” approach was applied that used a two‐level full‐factorial design. It was found that the interaction effects of the three factors mentioned above play a considerable role in interpreting the effect of each individual factor on the growth rate. These interaction effects must be considered when gaining knowledge of crystal growth for the purpose of process design.

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