References of "Heinrichs, Benoît"
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See detailHow to correctly determine the kinetics of a photocatalytic degradation reaction?
Pirard, Sophie ULg; Malengreaux, Charline ULg; Toye, Dominique ULg et al

in Chemical Engineering Journal (2014), 249

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See detailNanostructured catalysts by sol-gel process
Lambert, Stéphanie ULg; Heinrichs, Benoît ULg

Conference (2014, April 25)

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See detailKinetic study of 4-nitrophenol photocatalytic degradation over a Zn2+ doped TiO2 catalyst prepared through an environmentally friendly aqueous sol–gel process
Malengreaux, Charline ULg; Pirard, Sophie ULg; Bartlett, John et al

in Chemical Engineering Journal (2014), 245

A kinetic study of the photocatalytic degradation of 4-nitrophenol (4-NP) under UV–visible light (330 nm < k < 800 nm) has been performed via a rigorous chemical engineering approach over a Zn2+ doped ... [more ▼]

A kinetic study of the photocatalytic degradation of 4-nitrophenol (4-NP) under UV–visible light (330 nm < k < 800 nm) has been performed via a rigorous chemical engineering approach over a Zn2+ doped TiO2 catalyst prepared through an environmentally friendly aqueous sol–gel process. The experiments have been performed at three temperatures to enable the global activation energy to be estimated. The influence of the illumination intensity has also been considered. The possibility of internal and external diffusion limitations has been studied and the results obtained demonstrated that there is no diffusional limitation during the photocatalytic degradation of the 4-NP using the selected catalyst. Therefore, the apparent specific reaction rate measured corresponds to the actual reaction rate of the chemical reaction. Parameter adjustments show that the kinetic model that provides the best fit to the experimental data corresponds to a first order reaction. A sequence of elementary steps has been considered and a pseudo-steady state approach based upon the stationary state hypothesis for reaction intermediates has been applied to obtain a kinetic rate expression in agreement with the experimental data. The mean values of the reaction rate constant found at 283 K, 288 K and 293 K are respectively equal to k1 = 0.094 ± 0.003 m3 h- 1 kgcatalyst- 1; k2 = 0.119 ± 0.004 m3 h- 1 kgcatalyst- 1 and k3 = 0.150 ± 0.023 m3 h- 1 kg catalyst-1 and the global activation energy of the degradation reaction was evaluated as 40 kJ mol-1. A phenomenological kinetic mechanism is proposed to describe the reaction at a molecular scale. Finally, statistical validations and residuals analysis have been performed to confirm that the first order model is suitable to represent the 4-NP photocatalytic degradation over time. Such studies are essential to design a reactor for water pollutant degradation on an industrial scale. [less ▲]

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See detailComment dépolluer des eaux usées grâce à la lumière du soleil ?
Heinrichs, Benoît ULg

Learning material (2014)

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See detailVisible-light photo-activity of alkali metal doped ZnO
Benhebal, Hadj; Chaib, Messaoud; Malengreaux, Charline ULg et al

in Journal of the Taiwan Institute of Chemical Engineers (2014), 45(1), 249-253

In order to utilize visible light more efficiently in the field of photocatalysis, Li, Na and K-doped ZnO nanoparticles were prepared using a sol–gel method. The obtained samples were characterized by BET ... [more ▼]

In order to utilize visible light more efficiently in the field of photocatalysis, Li, Na and K-doped ZnO nanoparticles were prepared using a sol–gel method. The obtained samples were characterized by BET surface area measurements, X-ray diffraction, scanning electron microscopy and UV–vis analysis. The photocatalytic activity of the photocatalysts was evaluated for the degradation of p-nitrophenol (p-NP) under visible light irradiation. It has been observed that these photocatalysts could be a promising photocatalyst for degradation of organic molecules as compared to transition metal doped ZnO under visible light. Li-doped ZnO is the most active photocatalyst and shows high photocatalytic activity for the degradation of p-nitrophenol (p-NP). The enhanced photocatalytic activity of Li-doped ZnO is mainly due to the electron trapping by lithium metal ions, small particle size, large surface area, and high surface roughness of the photocatalysts. [less ▲]

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See detailDes surfaces fonctionnalisées : la solution par voie liquide
Heinrichs, Benoît ULg

Scientific conference (2013, November 29)

Créer à la surface d’un matériau un film antistatique, antibactérien, autonettoyant ou « easy to clean », un film capable d’épurer l’air ou l’eau. Produire une microbatterie de quelques microns ... [more ▼]

Créer à la surface d’un matériau un film antistatique, antibactérien, autonettoyant ou « easy to clean », un film capable d’épurer l’air ou l’eau. Produire une microbatterie de quelques microns d’épaisseur sur un support. Protéger une surface contre la corrosion. Transférer les propriétés d’une poudre à une surface. Immobiliser un catalyseur sur une surface. … L’industrie est aujourd’hui à la recherche de solutions innovantes pour produire des surfaces fonctionnalisées conférant des propriétés spécifiques et une haute valeur ajoutée aux matériaux et dispositifs qu’elle produit. Focus sur les procédés de dépôt de films par voie liquide, une alternative séduisante aux procédés sous vide. [less ▲]

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See detailEpuration catalytique de biogaz
Claude, Vincent ULg; Lambert, Stéphanie ULg; Heinrichs, Benoît ULg et al

Poster (2013, November 15)

The poster presents the recent observations concerning the of Ni-Al2O3 catalysts synthesized in 2013. Particles size, surface areas and crystallinity of the samples are controlled thanks to the initial ... [more ▼]

The poster presents the recent observations concerning the of Ni-Al2O3 catalysts synthesized in 2013. Particles size, surface areas and crystallinity of the samples are controlled thanks to the initial reactives (surfactants, EDAS). [less ▲]

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See detailNi/Al2O3 xerogel catalysts for biogas cleaning
Claude, Vincent ULg; Heinrichs, Benoît ULg; Lambert, Stéphanie ULg

Poster (2013, August 29)

This poster summarize the firsts results of the PhD project started on October 2012 about the catalytic purification of biogas. The aim of this project consists in the development of Ni/Al2O3 catalyst in ... [more ▼]

This poster summarize the firsts results of the PhD project started on October 2012 about the catalytic purification of biogas. The aim of this project consists in the development of Ni/Al2O3 catalyst in order to reform the tars present in the outlet gas of biomass gasifier. In order to obtain catalysts with high performance and lifetime, materials need to have optimized specific surface and metal particle dispersion. This poster investigate the effect of different surfactants (Pluronic P123; F127; stéarique acide, EDAS) on the materials properties. [less ▲]

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