Impact of surface tension and viscosity on solids motion in a conical high shear mixer granulator

Fan, Xianfeng; Yang, Zhiming; Parker, D.J.; Ng, Boonho; Ding, Yulong; Ghadiri, Mojtaba

doi:10.1002/aic.11926

Cited by 7 publications

(5 citation statements)

References 49 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…However, at too high viscosity, droplets will be unable to spread throughout the bed causing the reduction in collisions and relevant growth [35]. Surface tension and capillary forces always act to pull particles together, and their magnitudes depend on the liquid bridge formed between the particles [36]. Reducing binder surface tension causes the decrease in the capillary suction pressure and friction resistance, leading therefore to an improved wettability and spreading efficiency [10].…”

Section: Effect Of Binder Propertiesmentioning

confidence: 99%

Inside the Phenomenological Aspects of Wet Granulation: Role of Process Parameters

Simone¹,

Caccavo²,

Dalmoro³

et al. 2018

Granularity in Materials Science

View full text Add to dashboard Cite

Granulation is a size-enlargement process by which small particles are bonded, by means of various techniques, in coherent and stable masses (granules), in which the original particles are still identifiable. In wet granulation processes, the powder particles are aggregated through the use of a liquid phase called binder. The main purposes of sizeenlargement process of a powder or mixture of powders are to improve technological properties and/or to realize suitable forms of commercial products. A modern and rational approach in the production of granular structures with tailored features (in terms of size and size distribution, flowability, mechanical and release properties, etc.) requires a deep understanding of phenomena involved during granules formation. By this knowledge, suitable predictive tools can be developed with the aim to choose right process conditions to be used in developing new formulations by avoiding or reducing costs for new tests. In this chapter, after introductive notes on granulation process, the phenomenological aspects involved in the formation of the granules with respect to the main process parameters are presented by experimental demonstration. Possible mathematical approaches in the granulation process description are also presented and the one involving the population mass balances equations is detailed.

show abstract

Section: Effect Of Binder Propertiesmentioning

confidence: 99%

Inside the Phenomenological Aspects of Wet Granulation: Role of Process Parameters

Simone¹,

Caccavo²,

Dalmoro³

et al. 2018

Granularity in Materials Science

View full text Add to dashboard Cite

show abstract

“…As one of the most attractive resultant of the effects of intermolecular forces at the fluid surfaces, surface tension (ST) is an important physical–chemical property and related to numerous natural phenomena and practical applications . By definition, the ST is the force acted in the surface plane per unit length .…”

Section: Introductionmentioning

confidence: 99%

“… Table S1 Measured and calculated surface tensions of the N 2 –C 1 mixture in bulk phase at different temperatures and pressures. Table S2 Measured and calculated surface tensions of the C 1 –C 2 mixture in bulk phase at different temperatures and pressures. Table S3 Measured and calculated surface tensions of the N 2 –O 2 mixture in bulk phase at different temperatures and pressures.…”

mentioning

confidence: 99%

Semi‐analytical nanoscale‐extended surface tension correlation

2019

View full text Add to dashboard Cite

Surface tensions (STs) are of critical importance to numerous natural phenomena and practical applications while most existing ST correlations are in the empirical formulations and limited to the bulk phase. In this study, a new semi-analytical correlation based on the perturbation theory from the statistical thermodynamics is initially developed to calculate the STs of the various components in bulk and nanoconfined pores. The newly developed ST correlation is validated to be accurate and generalized in bulk and nanoconfined pores in comparison with the experimentally measured results at a wide range of temperatures. Furthermore, three important patterns with respect to the STs are determined: first, the STs are found to be reduced with the temperature increase but increase when the components become heavier in both bulk and nanoconfined pores; second, the STs of the mixtures tend to be more sensitive to the feed ratios at higher temperatures; last but not least, the nanoscale STs of the pure components are slightly lower than the bulk results at the same conditions.

show abstract

“…When fine particles of biomass are used, on the other hand, the feed must be introduced lower in the bed; otherwise, the fines are quickly entrained out of the bed before the completion of pyrolysis . These disadvantages can be overcome by employing a tapered bed, which has been used in a few other industrial processes including coal conversion, immobilized biofilm reaction and wastewater treatment …”

Section: Introductionmentioning

confidence: 99%

Hydrodynamics of binary mixtures in a tapered gas–solid fluidized bed

Ren

Pei

Zhang

et al. 2013

Asia-Pacific J Chem Eng

View full text Add to dashboard Cite

Tapered fluidized-bed reactors are suggested for biomass catalytic pyrolysis in this work. Both experiments and computational fluid dynamics simulations on hydrodynamics are conducted in a two-dimensional bed with an overall taper angle of 43.8°by using rapeseed as biomass and resin as substitutable catalyst. The results show that the jet penetration depth decreases with increasing initial bed height or decreasing jet gas velocity. However, the jet penetration depth displays a first-increase and then-decrease tendency with increasing resin fraction or annular gas velocity. A comparison of hydrodynamics between measured and simulated data, including the stochastic nature of the jets, identifies that the simple non-viscous two-fluid model can be used to predict the jet behaviors of both mono-particle system and well-mixed biomass mixtures. The results provide fundamental information for the design and scale-up of tapered fluidized-bed reactors for solid biomass catalytic pyrolysis.

show abstract

Impact of surface tension and viscosity on solids motion in a conical high shear mixer granulator

Cited by 7 publications

References 49 publications

Inside the Phenomenological Aspects of Wet Granulation: Role of Process Parameters

Inside the Phenomenological Aspects of Wet Granulation: Role of Process Parameters

Semi‐analytical nanoscale‐extended surface tension correlation

Hydrodynamics of binary mixtures in a tapered gas–solid fluidized bed

Contact Info

Product

Resources

About