Modeling a hollow micro-particle production process

Shabde, Vikram S.; Emets, Stanislav Valerievich; Mann, Uzi; Hoo, Karlene A.; Carlson, Neil N.; Gladysz, Gary M.

doi:10.1016/j.compchemeng.2005.05.019

Cited by 28 publications

(26 citation statements)

References 4 publications

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“…This model is coupled system of parabolic partial differential equations with a moving boundary. The formation of the polymeric crust or "skin" is predicted by this model [1]. In Shabde et al [4] a theoretical model has been developed for spray dryers used for the manufacture of micro-particles.…”

Section: Spray Drying Processmentioning

confidence: 99%

“…Most recently, spray drying technology has also been explored to make hollow micro-particles [1], [2]. In a spray drying operation, there are three main phenomena: 1) atomization of the liquid feed, 2) drying of the droplets once they are formed, and 3) motion of the droplet to model the spray drying process.…”

Section: Introductionmentioning

confidence: 99%

“…the amount of residual solvent in the product and the final particle size [1]. In lieu of online, real-time measurements of particle size and residual solvent concentration, these variables are estimated from other real-time measurable quantities, such as temperatures.…”

Section: Introductionmentioning

confidence: 99%

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Designing an Optimum Controller for a Spray Drying Process that Produces Micro-particles

Shabde

Hoo

2007

2007 IEEE International Conference on Control Applications

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Spray dryers represent an important unit operation in many industries such as pharmaceuticals and food. However, the approach to the design and control of spray dryers has been based primarily on heuristics. The traditional, serial approach to process design and control ignores the effect that the process design has on the control structure synthesis. Thus, it is not surprising that the achievable control performance is limited by the process design decisions. One approach to address this issue is to solve the design and control problems simultaneously. However, the simultaneous strategy can lead to a large and numerically intractable problem.In this work, a spray drying process that produces microparticles is used to investigate optimum controller designs using different approaches. The first approach assumes that both the process and controller designs are to be found sequentially, while the second seeks to couple the controller design to the process design. Results, using the spray dryer system, are presented to show the potential of using the coupled strategy to satisfy finding a design that admits a feasible controller.

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Section: Spray Drying Processmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Designing an Optimum Controller for a Spray Drying Process that Produces Micro-particles

Shabde

Hoo

2007

2007 IEEE International Conference on Control Applications

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“…Shabde et al [12] developed a model for the formation of micro-hollow particles produced in spray-drying technology. In their model, the droplet is first heated to a saturation temperature without any solvent loss.…”

Section: Introductionmentioning

confidence: 99%

Heat and Mass Transfer Mechanisms in Drying of a Suspension Droplet: A New Computational Model

et al. 2007

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A new computational single-droplet drying model is presented. The model considers heat and mass transfer simultaneously together with the receding evaporation front approach. A spherical droplet under constant drying conditions is considered. Computations are performed to predict the drying of colloidal silica-water suspension and skimmed milk. It is shown that the results agree well with those of experimental observations available in the literature. INTRODUCTIONSpray drying has found applications in many fields such as chemical, agricultural, food, polymer, pharmaceutical, ceramics, and mineral processing industries due to its flexibility in meeting product requirements as well as its high energy efficiency compared to other drying methods. In a typical spray-drying operation, atomization of the feed into small droplets generates large surface area for both heat and mass transfer.Experiments [1][2][3] on drying of droplets containing suspended or dissolved solids have provided qualitative description of drying of droplets. Drying first occurs at a constant rate, followed by a falling rate similar to what is usually observed in other drying operations. In the constant rate period, after an initial adjustment, droplet temperature reaches air wet-bulb temperature. In the falling rate period, however, an additional resistance to both heat and mass transfer arises due to formation of a porous solid layer. Temperature gradients within the droplet become higher compared to constant rate period since surface temperature of the droplet continuously increases from wetbulb temperature to dry-bulb temperature of air as drying proceeds. Obtaining important drying quantities such as drying rate, temperature, and moisture distributions is

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“…Particularly, the hollow particles possess a large geometric diameter about 10 mm while a small aerodynamic diameter ranging from 1 mm to 5 mm [19][20][21][22][23] . All of these make the hollow particles attractive for various chemical and pharmaceutical applications [24][25][26] .…”

Section: Introductionmentioning

confidence: 99%

Preparation of Highly Oil-Absorbing Resins Consisting of Hollow Nanoparticle Aggregates by Spray Drying

Huang¹,

Xiao²,

Chen³

et al. 2009

Polymer-Plastics Technology and Engineering

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We report on the preparation of a novel poly(styrene-dodecyl methacrylate) (P(St-DMA)) absorbent resin by spray drying. The microstructures of the prepared resins have been examined by scanning electron microscope (SEM), showing that the resins consisted of hollow micrometer-sized spheres that were aggregated by nanoparticles. Meanwhile, the effects of the content of the cross-linker divinybenzene (DVB) on the oil absorption capacity, the desorption efficiency and the resin microstructures have also been studied. The absorption performance and the hydrophobic properties of the resins prepared by spray drying and vacuum drying have been studied and compared.

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Modeling a hollow micro-particle production process

Cited by 28 publications

References 4 publications

Designing an Optimum Controller for a Spray Drying Process that Produces Micro-particles

Designing an Optimum Controller for a Spray Drying Process that Produces Micro-particles

Heat and Mass Transfer Mechanisms in Drying of a Suspension Droplet: A New Computational Model

Preparation of Highly Oil-Absorbing Resins Consisting of Hollow Nanoparticle Aggregates by Spray Drying

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