Publications
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Applying the wave theory to fixed-bed dynamics of Metal-Organic Frameworks exhibiting stepped adsorption isotherms: Water/ethanol separation on ZIF-8 Vrije Universiteit Brussel
Zeolitic Imidazolate Framework-8 (ZIF-8) is a promising material for the energy-efficient recovery of bio-alcohols from aqueous mixtures. Its adsorption isotherms have inflection points and breakthrough curves obtained in dynamic column separation experiments exhibit stepped profiles. With the aim to optimize this adsorptive alcohol recovery process using ZIF-8, the correlation between the shape of the adsorption isotherms and the breakthrough ...
Acoustic energy isotherms: An emergent approach for textural characterization of activated carbons Hasselt University
Acoustic Emission Analysis (AEA) for textural characterization of granular activated carbons (GACs) is an interesting alternative for assessing the GAC volume of pores in a rapid, sensitive and reliable way. Correlations between AEA and conventional methods have demonstrated its potentialities for textural characterization of high-porosity materials. In this study, commercial GACs with different porous characteristics were compared and ...
The isotherm migration method in spherical coordinates with a moving heat source Vrije Universiteit Brussel
An isotherm migration method is presented to track the isotherms at the surface of a semi-infinite workpiece that is being heated by a point source with a linear motion. The governing heat conduction equation is first transformed into a one-dimensional isotherm migration equation in spherical coordinates, which expresses the isotherm velocities as a function of the isotherm positions and their temperature derivatives. A finite difference ...
A parametric study on the applicability of the 500°C isotherm method for investigating interaction curves of columns exposed to fire Ghent University
With respect to the ultimate load-bearing capacity of a heated cross-section, a simplified cross-section method - the 500°C isotherm method - is presented in EN 1992-1-2. This method may also be considered when calculating second order effect and in conjunction with both standard and parametric fires. However, no explicit applications are given for this method. Comparing calculations with results available in literatures, it is found that the ...
An explicit multicomponent adsorption isotherm model: accounting for the size-effect for components with Langmuir adsorption behavior Vrije Universiteit Brussel
Abstract: The extended Langmuir (EL) model is a popular multicomponent adsorption equilibria model, which can be based on single component Langmuir isotherms fitted on pure component data. Such explicit models are preferred over their implicit counterparts due to a lower computational requirement. An important shortcoming of the EL model is its inability to capture the adsorbate size effect occurring when the saturation capacities of pure ...
An Application of Equilibrium Constant to the Calculation of an Extraction Isotherm for the Synergistic Solvent Extraction of Mn (II) KU Leuven
Copyright © The Korean Institute of Metals and Materials. The equilibrium constant is an important parameter in solvent extraction equilibrium and can be used to represent the extractant capability. The paper describes the application of the equilibrium constant in calculating an extraction isotherm. The solvent extraction of Mn(II) from chloride solutions using a mixture of Cyanex 272 + Cyanex 301 and Cyanex 301+ TBP was studied. Extraction ...
Stepped water isotherm and breakthrough curves on aluminium fumarate metal-organic framework: experimental and modelling study Vrije Universiteit Brussel KU Leuven
Adsorption of water vapour on the Al-fumarate metal-organic framework (MOF) was studied in static and dynamic conditions, by performing gravimetric and fixed bed experiments. A two-step, type IV water isotherm is obtained, which reveals the complexity and the duality of the hydrophilic/hydrophobic behaviour of this MOF. Breakthrough experiments with feed conditions corresponding to three different zones in the water adsorption isotherm were ...
Effect of maturity on the moisture sorption isotherm of chili pepper (Mareko Fana variety) KU Leuven
The moisture sorption isotherm at three maturity levels of the M a reko Fana chili pepper variety (red, brown and green) has been studied in this paper. The sorption isotherm was determined based on the standard static gravimetric method using a glycerol-water mixture in a relative humidity range of 10-92% at three temperature levels and nonlinear regression analysis was used to select suitable sorption models. The Clasius - Clapeyron equation ...
Separating viscoelastic and compressibility contributions in pressure-area isotherm measurements KU Leuven
Monolayers of surface active molecules or particles play an important role in biological systems as well as in consumer products. Their properties are controlled by thermodynamics as well as the mechanical properties of the interface itself. For insoluble species forming Langmuir monolayers, surface pressure-area isotherms are typically used to characterize the thermodynamic state. A Langmuir trough equipped with a Wilhelmy plate is often used ...