Filterkuchenwäsche makroporöser Kieselgelpartikel

Seupel, Sabine; Peuker, Urs A.

doi:10.1002/cite.201900074

Cited by 7 publications

(4 citation statements)

References 15 publications

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“…For both cases, various applications exist. Examples of Case A are washing of porous media, such as filter cake washing, coffee extraction, or removing impurities in porous solids 6,8,27,28 . In Case B, the mass transfer occurs in the opposite direction.…”

Section: Introductionmentioning

confidence: 99%

“…Examples of Case A are washing of porous media, such as filter cake washing, coffee extraction, or removing impurities in porous solids. 6,8,27,28 In Case B, the mass transfer occurs in the opposite direction. Initially, an unloaded stationary phase is flowed by a fluid phase containing a target component to load the solid phase with this target component or to remove the target component from the liquid phase.…”

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confidence: 99%

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Model‐based design of stratified packings for enhanced mass transfer using optimal control theory

Eppink,

Kuhn,

Briesen

2023

AIChE Journal

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Various examples show that stratified columns can improve the transport performance of particle packings. However, to date, there is no universal strategy to design these packings to yield optimal performance. This study proposes a model‐based approach for designing particle packings in which mass transfer occurs between a liquid phase and a stationary phase using optimal control theory. The primary objective is to provide a general design strategy that is applicable across different unit operations in chemical, pharmaceutical, and food applications. Optimal control is utilized to determine the optimal particle diameter as a function of the axial position within the column. We demonstrate the approach using two case studies and three different optimization criteria. Numerical results indicate that the proposed method is highly effective, for example, the solvent demand is reduced by up to . Moreover, the optimally graded packing yields a significantly sharper breakthrough curve of an adsorption column.

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Section: Introductionmentioning

confidence: 99%

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confidence: 99%

Model‐based design of stratified packings for enhanced mass transfer using optimal control theory

Eppink,

Kuhn,

Briesen

2023

AIChE Journal

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“…Poröse Partikel können beispielsweise Mutterflüssigkeit im Partikel einlagern, so dass die Verunreinigung nur durch Diffusion aus dem Partikel ausgewaschen werden kann. Untersuchungen hierzu liegen für mesoporöse Partikel von 1 und für makroporöse Partikel von 2 vor. Eine Adsorption und Desorption von Verunreinigungen an der Partikeloberfläche werden nicht berücksichtigt.…”

Section: Introductionunclassified

Modellbildung und Simulation der mehrstufigen Filterkuchenwäsche im Gegenstrom

Sprott

Brückner

Hoffner

2021

Chemie Ingenieur Technik

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Die Filterkuchenwäsche ist ein weitverbreiteter Prozess in vielen Industriezweigen. Jedoch ist der Prozess sehr komplex und nur schwer mathematisch zu beschreiben. Vor allem die mehrstufige Filterkuchenwäsche im Gegenstrom weist noch erhebliche Verständnisdefizite auf. In dieser Arbeit wird ein Modell vorgestellt, mit welchem die Filterkuchenwäsche für nicht poröse Partikel für die bekannten Phänomene Verdrängung, Dispersion und Diffusion beschrieben werden kann. Mit Beispielsimulationen wird die Anwendbarkeit des Modells veranschaulicht.

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“…Furthermore Wiedemann and Stahl reported on the high risk of cracking in compressible filter cakes, which leads to inhomogeneous flow and high consumption of washing liquid 4. If porous particle systems are used, the difficulties increase, as mother liquor can remain in the inner pores of the particles 5.…”

Section: Introductionmentioning

confidence: 99%

Diafiltration of Highly Concentrated Suspensions with Fine Particles by Dynamic Disk Filtration

et al. 2021

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A method for washing highly concentrated suspensions with fine particles by using a filter with overlapping disks was studied. For the experiments, alumina and titanium dioxide suspensions were used. It was demonstrated that the used suspensions have non‐Newtonian behavior. The viscosity is influenced by the type of particle system, the solid concentration, and the shear rate. The washing process is operated in a discontinuous and a continuous way. The rotation of the disks and the shear flow across their surface prevents the formation of a filter cake and facilitates the handling of suspensions. The shear stresses at the filter disk and the rheology of the processed suspensions are both influenced by the type of particle system, the solid concentration, and the process parameters.

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Filterkuchenwäsche makroporöser Kieselgelpartikel

Cited by 7 publications

References 15 publications

Model‐based design of stratified packings for enhanced mass transfer using optimal control theory

Model‐based design of stratified packings for enhanced mass transfer using optimal control theory

Modellbildung und Simulation der mehrstufigen Filterkuchenwäsche im Gegenstrom

Diafiltration of Highly Concentrated Suspensions with Fine Particles by Dynamic Disk Filtration

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