Prediction of ion-exchange column breakthrough curves by constant-pattern wave approach

Lee, I.-Hsien; Kuan, Yu-Chung; Chern, Jia‐Ming

doi:10.1016/j.jhazmat.2007.06.098

Cited by 11 publications

(2 citation statements)

References 33 publications

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“…In commercial-scale column chromatographic applications in particular, and even in catalysis, materials are required in the form of particles or beads having diameters of around 1 mm . Control of bead diameter is important because the void fraction is one of the parameters influencing ion-exchange column dynamics. , Xerogel powders are most often not suitable, especially for large-scale applications, because column plugging can occur. Aside from column performance, the production costs of such granular materials represent another important consideration in commercial applications; therefore, simple processing strategies for bead production are favored.…”

Section: Introductionmentioning

confidence: 99%

Mesoporous Zirconium Titanium Oxides. Part 2: Synthesis, Porosity, and Adsorption Properties of Beads

Sizgek

Griffith

et al. 2008

Langmuir

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Mesoporous zirconium titanium mixed-oxide beads having disordered wormhole textures and mole fractions of Zr (x) ranging from x=0.25 to 0.67 have been prepared. The bead preparation method combined the forced hydrolysis of mixtures of zirconium-titanium alkoxides in the presence of long-chain carboxylates with external gelation. Uniformly sized beads could be produced in the size range 0.5-1.1 mm by varying the droplet size and viscosity of the mixed-oxide sol, thus making them suitable for large-scale column chromatographic applications. The beads exhibited narrow pore size distributions with similar mean pore diameters of around 3.7 nm. The specific surface areas of the beads were linked to the Zr mole fraction in the precursor solution and were generally greater than 350 m2/g for x=0.5. A combination of scanning transmission electron microscopy and X-ray absorption fine structure analysis indicated that the pore walls of the beads were composed of atomically dispersed Zr and Ti to form a continuous network of Zr-O-Ti bonds. Mass transport in the beads was evaluated by monitoring the kinetics of vanadate and vanadyl adsorption at pH 10.5 and 0.87, respectively.

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Section: Introductionmentioning

confidence: 99%

Mesoporous Zirconium Titanium Oxides. Part 2: Synthesis, Porosity, and Adsorption Properties of Beads

Sizgek

Griffith

et al. 2008

Langmuir

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“…and Eqs (6)(7)(8)(9)(10)(11)(12)(13)(14). In the hybrid mathematical model, the artificial neural network replaces Eq.…”

Section: Ion Exchange Process In a Fixed-bed Columnmentioning

confidence: 99%

Comparison of Phenomenological and Hybrid Models in the Description of the Ion Exchange Process in a Fixed-Bed Column

D'Arisbo

Silva

Borba

et al. 2013

Separation Science and Technology

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In this study, two models (phenomenological and hybrid) were used in the description of the ion exchange process in a fixed-bed column. The external and internal mass transfer limitations and thermodynamic equilibrium at the solid-liquid interface were considered. In the phenomenological model, the mass action law was used to describe the equilibrium, while, in the hybrid model an artificial neural network (ANN) was used. The experimental equilibrium data were used for the validation of the ANN. The performance of the models was compared using experimental breakthrough curves. Both models described well the ion exchange process. The simulation time using the hybrid model was shorter.

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Artificial Neural Network Modeling of Cd(II) Ions Adsorption on Nano-porous Inorganic Sorbents

Kuvendžiev

Marinkovski

Lisichkov

et al. 2014

Nanoscience Advances in CBRN Agents Detection, Information and Energy Security

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Prediction of ion-exchange column breakthrough curves by constant-pattern wave approach

Cited by 11 publications

References 33 publications

Mesoporous Zirconium Titanium Oxides. Part 2: Synthesis, Porosity, and Adsorption Properties of Beads

Mesoporous Zirconium Titanium Oxides. Part 2: Synthesis, Porosity, and Adsorption Properties of Beads

Comparison of Phenomenological and Hybrid Models in the Description of the Ion Exchange Process in a Fixed-Bed Column

Artificial Neural Network Modeling of Cd(II) Ions Adsorption on Nano-porous Inorganic Sorbents

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