Rotation dynamics of 2-methyl butane and n-pentane in MCM-22 zeolite (2009)
Huang, S, Finsy, V, Persoons, J, Telling, MTF, Baron, GV, Denayer, JFM
Aggregation state effects in shape-selective hydroconversion (2007)
Laxmi Narasimhan, CS, Thybaut, Joris, Denayer, JF, Baron, GV, Jacobs, PA, Martens, JA, ...
A unified model for the description of vapor- and liquid-phase hydroconversion has been developed. The high isomer yield, which is typical for the shape selectivity exhibited by Pt/H-ZSM-22 at...
Aggregation state effects in shape-selective hydroconversion (2007)
Laxmi Narasimhan, CS, Thybaut, Joris, Denayer, JF, Baron, GV, Jacobs, PA, Martens, JA, ...
n- and isoalkane adsorption mechanisms on zeolite MCM-22 (2006)
Ocakoglu, RA, Thybaut, J, Marin, G, ...
Low-coverage adsorption properties ( Henry constants, adsorption enthalpy, and entropy) of linear and branched alkanes (C3-C8) on zeolite MCM-22 were determined using the chromatographic technique at...
Thybaut, JW, Bertinchamps, F, ...
Micrometer-size MTT-type zeolite crystals with aluminum depiction in the outer layer were synthesized. The compositional variation in individual crystals was obtained by altering the chemical...
n- and isoalkane adsorption mechanisms on zeolite MCM-22 (2006)
DENAYER, JFM, OCAKOGLU, RA, Thybaut, Joris, Marin, Guy, JACOBS, P, MARTENS, J, ...
Billen, J, Gzil, P, Baron, GV, Desmet, G
The present computational study illustrates how the existence of a residual lower limit on the variance of the skeleton and through-powe size of monolithic columns can be expected to severely...
Influence of the packing heterogeneity on the performance of liquid chromatography supports (2005)
Billen, Johan; U0007742, Gzil, P, Vervoort, N, Baron, GV, Desmet, G
We report on a series of plate height and flow resistance data obtained via computational fluid dynamics simulations in a simplified two-dimensional (2D) mimic of real packed bed and monolithic...
De Smet, J, Gzil, P, Vervoort, N, Verelst, H, Baron, GV, Desmet, G
We report on a theoretical Study wherein we considered a large number of ordered two-dimensional porous pillar arrays with different pillar shapes and widely varying exterrial porosity and calculated...
Skeletal isomerization of octadecane on bifunctional ZSM-23 zeolite catalyst (2005)
Bertinchamps, F, Narasimhan, CLS, Gaigneaux, EM, ...
Octadecane was isomerized over three different Pt/H-ZSM-23 samples. The distributions of methylheptadecane and dimethylheptadecane skeletal isomers obtained on the Pt/ZSM-23 samples were very...
Skeletal isomerization of octadecane on bifunctional ZSM-23 zeolite catalyst (2005)
HUYBRECHTS, W, VANBUTSELE, G, HOUTHOOFD, KJ, BERTINCHAMPS, F, NARASIMHAN, CLS, GAIGNEAUX, EM, ...
Acid-metal balance of a hydrocracking catalyst: Ideal versus nonideal behavior (2005)
Thybaut, Joris, NARASIMHAN, CSL, DENAYER, JF, BARON, GV, JACOBS, PA, MARTENS, JA, ...
Shear-driven flow approaches to LC and macromolecular separations (2004)
Clicq, D, Pappaert, K, Vankrunkelsven, S, Vervoort, N, Baron, GV, Desmet, G
Exploiting the benefits of miniaturization for the enhancement of DNA microarrays (2004)
Vanderhoeven, J, Pappaert, K, Dutta, Binita; U0042918, Van Hummelen, Paul; U0035165, Baron, GV, Desmet, G
The present study demonstrates that the best way to enhance DNA microarray assays, both in terms of analysis speed and in final spot intensity, is to dissolve the available molar amount of sample in...
General rules for the optimal external porosity of LC supports (2004)
Gzil, P, Vervoort, N, Baron, GV, Desmet, G
We present a series of numerically calculated plate height and flow resistance data obtained for an idealized chromatographic support mimic with variable bed porosity (0.3 less than or equal to...
Vervoort, N, Billen, Johan; U0007742, Gzil, P, Baron, GV, Desmet, G
The influence of the detailed design of the sidewall region upon the over-all band-broadening in microfabricated packed-bed or collocated monolithic support structure (COMOSS) columns has been...
De Smet, J, Gzil, P, Vervoort, N, Verelst, H, Baron, GV, Desmet, G
We report on a computational study assessing the effect of the pillar shape in perfectly ordered porous chromatographic media. Using computational fluid dynamics to compare the band broadening and...
A computational study of the porosity effects in silica monolithic columns (2004)
Gzil, P, Vervoort, N, Baron, GV, Desmet, G
We report on a theoretical study of the influence of the through-pore porosity on the main chromatographic performance parameters (reduced theoretical plate height, flow resistance, and separation...
Clicq, D, Vervoort, N, Ranson, W, De Tandt, C, Ottevaere, H, Baron, GV, ...
We demonstrate the possibility to generate ultra-rapid, low-axial dispersion flows through flat-rectangular nano-channels, i.e., channels with a thickness as small as 100 nm. This is achieved by...
Vankrunkelsven, S, Clicq, D, Pappaert, K, Baron, GV, Desmet, G
We explore the possibility of generating high-velocity flows of nanoparticles through flat-rectangular nanochannels, which are only 50% deeper than the diameter of the particles. Using the...
Clicq, D, Vervoort, N, Baron, GV, Desmet, G
The authors discuss the application of a novel method (shear-driven chromatography) to propel mobile phase in high-resolution/high-speed liquid chromatography, and so attempt to overcome the...
Vervoort, N, Gzil, P, Baron, GV, Desmet, G
We report on the use of commercial computational fluid dynamics software to study the band broadening in a perfectly ordered three-dimensional model structure, the so-called tetrahedral skeleton...
Gzil, P, De Smet, J, Vervoort, N, Verelst, H, Baron, GV, Desmet, G
The chromatographic performance of several straightforward two-dimensional etched packed bed column lay-outs (equilaterally staggered arrays of, respectively, circular, hexagonal, and diamond-like...
Gzil, P, Vervoort, N, Baron, GV, Desmet, G
A series of theoretical calculations is presented to quantify the gain in LC separation efficiency that can be expected if the traditionally used packed bed columns were replaced by columns with a...
Diffusion-reaction modelling of DNA hybridization kinetics on biochips (2003)
Pappaert, K, Van Hummelen, Paul; U0035165, Vanderhoeven, J, Baron, GV, Desmet, G
An analytical expression for the rate of DNA hybridization on the surface of DNA biochips is established for the case of a finite 1-D diffusion space. The expression allows to account for the...
Enhancement of DNA micro-array analysis using a shear-driven micro-channel flow system (2003)
Pappaert, K, Vanderhoeven, J, Van Hummelen, Paul; U0035165, Dutta, B, Clicq, D, Baron, GV, ...
A very simple micro-channel flow system is used to investigate the potential gain in hybridization rate stemming from the induction of a convective flow past the surface of a DNA micro-array....
Desmet, G, De Greef, Josephine; U0020277, Verelst, H, Baron, GV
The maximally attainable productivity of perforated monolithic bed reactors has been compared to that of the traditional packed bed of spheres for the case of laminar flow conditions and first-order...
Desmet, G, De Greef, Josephine; U0020277, Verelst, H, Baron, GV
A global optimization analysis of a general class of perforated monolithic bed reactors is presented for the case of an isothermal first-order reaction and for laminar flow conditions. The resulting...
A theoretical calculation of the separation performance of a (hypothetical) micro-structured monolithic LC column is presented, confirming that the polydispersity effect in parallel bundle columns...
A correlation for the pressure drop in monolithic silica columns (2003)
Vervoort, N, Gazil, P, Baron, GV, Desmet, G
To gain insight into how the pressure drop in monolithic silica columns is determined by the microscopic details of the pore structure, a series of well-validated computational fluid dynamics...
Vervoort, N, Clicq, D, Baron, GV, Desmet, G
We present a new stationary phase coating method, yielding a monolayer of densely arrayed porous HPLC beads (d(p) = mum) for use in a disposable shear-driven flow LC system. The system is inherently...
Adsorption Competition Effects in Hydroconversion of Alkane Mixtures on Zeolites. (2003)
DENAYER, JF, OCAKOGLU, AR, DE JONCKHEERE, BA, MARTENS, JA, Thybaut, Joris, Marin, Guy, ...
Kinetic modeling of pore mouth catalysis in the hydroconversion of n-octane on Pt-H-ZSM-22 (2003)
NARASIMHAN, CSL, Thybaut, Joris, Marin, Guy, JACOBS, PA, MARTENS, JA, DENAYER, JF, ...
Van Isacker, A, ...
n-Alkane hydroisomerisation and hydrocracking experiments reveal that ZSM-5 materials synthesized by self-assembly of nanoslabs show different molecular shape selectivity than ZSM-5 synthesized by...
Engelen, K, Zhang, YH, Draelants, DJ, Baron, GV
A 1 wt%/0.5 wt% nickel-calcium catalyst was co-precipitated inside porous filter discs using the urea method to develop a gas cleaning technique involving the combined removal of tars and particles...
Zhang, YH, Draelants, DJ, Engelen, K, Baron, GV
The urea method was applied to deposit a nickel-calcium catalyst inside porous filter discs to develop a gas cleaning technique involving the combined removal of tars and particles from hot biomass...
Mesoporous Zr and Hf catalysts for chemoselective MPV reductions of unsaturated ketones (2003)
Limbourg, M, Denayer, J, Baron, GV, Parvulescu, V, ...
Zr and Hf catalysts were immobilized in mesoporous materials such as MCM-41 or MCM-48; in comparison with the homogeneous catalysts, the resulting materials display strongly increased activity in the...
Ocakoglu, R, Calero, S, ...
FWO Vlaanderen; IAP-PAI; GOA
Sub-second liquid chromatographic separations by means of shear-driven chromatography (2002)
Clicq, D, Vervoort, N, Vounckx, R, Ottevaere, H, Buijs, J, Gooijer, C, ...
Utilizing the concept of shear-driven chromatography, we have been able to realize reversed-phase LC separations in flat rectangular nano-channels coated with a C-8 monolayer and being as thin as 100...
Desmet, G, Vervoort, N, Clicq, D, Huau, A, Gzil, P, Baron, GV
It is only by developing specially designed injection and detection systems that shear-driven chromatography can become a viable alternative to HPLC. In the present paper, a dedicated zero...
Based on a simple, chromatography-based analogy, a quantitatively exact explanation for the strong additional band broadening induced by the presence of the side-walls in flow channels with a large...
Desmet, G, Vervoort, N, Clicq, D, Baron, GV
The possibility to perform shear-driven chromatographic separations in micro-channels is demonstrated, using a novel laser-jet printed microfluidic channel system. The obtained theoretical plate...
Pushing the miniaturisation of LC with shear-driven flows (2001)
Desmet, G, Clicq, D, Boogaerts, S, Vervoort, N, Baron, GV
Recently, a novel driving principle for the mobile phase flow in open-tubular chromatographic systems has been proposed to evade the pressure drop limitation of pressure-driven chromatographic...