Insight into first-order breakage kinetics using a particle-scale breakage rate constant

Capece, Maxx; Bilgili, Ecevit; Davé, Rajesh N.

doi:10.1016/j.ces.2014.06.019

Cited by 49 publications

(19 citation statements)

References 31 publications

(72 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…They showed that the computational time using the PBM–ANN model was considerably shorter than that with DEM–PBM. The above mentioned studies on DEM–PBM frameworks did not consider agglomerates of particles and their breakage, but only systems of individual particles interacting among each other …”

Section: Introductionmentioning

confidence: 99%

“…The above mentioned studies on DEM-PBM frameworks did not consider agglomerates of particles and their breakage, but only systems of individual particles interacting among each other. 10,11,13,14 Localized disintegration and multiple fragmentation, described by Subero and Ghadiri 5 and observed in Thornton, [6][7][8] were considered by Reynolds 15 to establish a mechanistic PBM model for a conical screen mill. This model, which considers the agglomerate impact breakage and the milled granule size distribution, is based on two hypotheses: (1) Once the milled granule is sufficiently small to pass through the screen bores, it leaves the mill without any other breakage.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

DEM–PBM modeling of impact dominated ribbon milling

Loreti

Reynolds

et al. 2017

AIChE Journal

View full text Add to dashboard Cite

Ribbon milling is a critical step in dry granulation using roll compaction as it determines the properties of granules, and subsequently the properties of final products. During ribbon milling, fragmentation of ribbons or flakes (i.e., compressed agglomerates from dry powders) are induced by either impact or abrasion. Understanding these fragmentation mechanisms is critical in optimizing ribbon milling processes. In the current study, the discrete element method (DEM) was used to model fragmentation at the microscopic level, providing a detailed insight into the underlying breakage mechanism. In DEM modeling, virtual ribbons were created by introducing an appropriate interfacial energy using the cohesive particle model based on the JKR theory. A set of three‐dimensional parallelepiped ribbons with solid fraction φ=0.7422 and surface energies ranging from γ=0.03normalJ/m2 and γ=2 normalJ/m2 were created and then fractured during impacts with a plane at various impact velocities, to model impact dominated milling. The fragmentation rate, and the number and size of fragments (i.e., granules) resulting from the breakage of a ribbon during the impact were determined. The DEM simulations showed that the granules size distribution had a bimodal pattern and there was a strong correlation between the size of fines generated from fragmentation during impact and the size of the feed powder (i.e., the size of the primary particles in this study), which was consistent with the observation from physical experiments. Two quantities were calculated from the DEM simulations: the number of fragments p and the fraction of fines z for each breakage event which were then used as input parameters for population balance models (PBM) to develop a DEM–PBM modeling framework. Comparision with published experimental data shows that the developed DEM‐PBM model is a promising tool for analysing ribbon milling, but all breakage mechanisms involved need to to considered in order to achieve an accurate prediction. © 2017 American Institute of Chemical Engineers AIChE J, 63: 3692–3705, 2017

show abstract

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

DEM–PBM modeling of impact dominated ribbon milling

Loreti

Reynolds

et al. 2017

AIChE Journal

View full text Add to dashboard Cite

show abstract

“…Capece et al [80] simulated dry milling in a ball mill, using the impact energy distribution obtained via DEM to determine the value of a mechanistic breakage rate constant, finding that the PSD does not affect the breakage rate constant in a first-order breakage model. This multi-scale approach takes advantage of the inherent mechanistic nature of DEM in the often empirical PBM.…”

Section: Milling and Breakagementioning

confidence: 99%

Discrete Element Modeling of Solid Dosage Manufacturing Processes

Barrasso

Ramachandran

2016

Methods in Pharmacology and Toxicology

View full text Add to dashboard Cite

Solid dosage manufacturing primarily involves powder process operations, such as mixing, granulation, and compaction. A model-based approach can be used to develop a better scientific understanding of these processes and implement Quality by Design. These models must predict the critical quality attributes of the product based on process parameters, equipment geometry, and material properties. Discrete element modeling (DEM) is often used to capture mechanistic, particle-scale information, such as velocity and force profiles. In this chapter, recent literature studies that use the DEM to model solid dosage manufacturing processes will be presented and discussed.

show abstract

“…With being the collision frequency, being the energy of the lth collision, and and being material properties [83].…”

Section: Population Balance Modelingmentioning

confidence: 99%

Particulate solid attrition in CFB systems – An assessment for emerging technologies

2016

View full text Add to dashboard Cite

Over the years, circulating fluidized bed systems have been designed for chemical conversion and energy recovery due to the ability of allowing continuous processing. While many CFB technologies are well established, a number of emerging technologies in recent years are utilizing the CFB concept, such as chemical looping combustion, novel continuous temperature swing adsorption, and transport gasifiers. A major uncertainty in these new technologies is the effect that attrition of bed material has on the overall process economics and system operability. This work presents a review of the study of attrition for CFB systems, including relevant material properties, basic modeling and prediction, as well as particle population balance techniques. Because some of these new processes use novel materials, this work focuses on applying fundamental material properties to the understanding of attrition.

show abstract

Insight into first-order breakage kinetics using a particle-scale breakage rate constant

Cited by 49 publications

References 31 publications

DEM–PBM modeling of impact dominated ribbon milling

DEM–PBM modeling of impact dominated ribbon milling

Discrete Element Modeling of Solid Dosage Manufacturing Processes

Particulate solid attrition in CFB systems – An assessment for emerging technologies

Contact Info

Product

Resources

About