Mass transfer measurements and modeling in a microchannel photocatalytic reactor

Corbel, Serge; Becheikh, Nidhal; Roques-Carmes, Thibault; Zahraa, Orfan

doi:10.1016/j.cherd.2013.10.011

Cited by 40 publications

(20 citation statements)

References 20 publications

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“…The immobilization procedure adopted in this work, similar to that followed by Choi et al, represents a different criterion in comparison with the techniques commonly used in related studies in the literature, which generally adopted the mass variation of the microreactor between successive cycles to assess the progress of the deposition . In these works, a surface mass density was defined as cutoff criterion: when this parameter reached a specified value, the deposition process was stopped.…”

Section: Resultsmentioning

confidence: 99%

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Intensification of photocatalytic pollutant abatement in microchannel reactor using TiO₂ and TiO₂‐graphene

Padoin¹,

Andrade

Ângelo

et al. 2016

AIChE Journal

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A microfluidic device was applied to the photocatalytic degradation of methylene blue as a model pollutant. Titanium dioxide nanoparticles (TiO2-P25) and a synthesized composite TiO2-graphene catalyst were immobilized on the inner walls of a borosilicate glass microfluidic chip. The deposition evolution of the nanoparticles was evaluated by monitoring the optical profile of the system. It was found that a higher initial reaction rate was obtained in the microreactor containing composite catalyst (TiO2-GR) on the inner walls, but both systems (TiO2 and TiO2-GR) achieved similar reaction rates when the steady-state was reached. Decolorization rate of methylene blue in our microfluidic chips was found to be approximately one order of magnitude higher than equivalent macroscopic systems reported in the literature at similar experimental conditions. Additionally, computational simulations were performed to investigate the physics involved in these processes. The model was experimentally validated for further scale-out studies.

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Section: Resultsmentioning

confidence: 99%

“…However, few contributions are concerned about the use of this technology for the mitigation of environmental problems . Furthermore, the effect of the operational conditions and geometry of the microchannels were not yet completely elucidated.…”

Section: Introductionmentioning

confidence: 99%

Intensification of photocatalytic pollutant abatement in microchannel reactor using TiO₂ and TiO₂‐graphene

Padoin¹,

Andrade

Ângelo

et al. 2016

AIChE Journal

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“…Previously, several microchannel reactors have been tested [17][18][19][20] in order to determine the best design of microreactors. The one tested in this research is composed of a microchannel with a serpentine shape engraved in a stainless steel support.…”

Section: Methodsmentioning

confidence: 99%

Kinetic study of photocatalytic degradation of Ifos famide in a microchannel and simulation

Corbel¹,

Donat²,

Schneider³

2019

SDRP-JNMS

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Among the possible solutions for the intensification of photocatalytic reactions, the use of microreactors is emerging. Such an approach was applied to the photodegradation of Ifosfamide in a flow microreactor with an immobilized catalyst composed of ZnO sensitized with CuInZnxS2+x quantum dots. The conversion yield at a low flow rate was investigated. A computational flow simulation allows to determine an apparent constant rate and the diffusion coefficient towards the photocatalyst surface. Photocatalytic degradation of Ifosfamide can be fitted by the Langmuir-Hinshelwood model. The Sherwood number and the average value of Damköhler show that the photocatalytic reaction under our experimental conditions is limited by the mass transfer.

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“…Different types of UV photocatalytic reactors have been designed to degrade organic molecules in air and water . Due to the surface reactions, the reactor should be configured for optimum mass transfer of oxygen, reactant, and product .…”

Section: Introductionmentioning

confidence: 99%

A corrugated plate photocatalytic reactor for degradation of waterborne organic contaminants

et al. 2019

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A UV‐C/titanium dioxide (TiO2) plate coated photocatalytic reactor using a corrugated frame system was designed for water borne organic contaminant degradation. The anticipated advantages of using the corrugated layout include a larger photocatalytic surface area per unit volume and improved photocatalytic activity. The water distribution system was designed to assist effective interactions among the water pollutant, photocatalyst, and photons. The degradation of a methylene blue solution, as a model water contaminant, was carried out at room temperature (22 °C) at different concentrations and flowrates. With an 11 mg/L methylene blue solution, 70 % was degraded within the first 10 min using TiO2 coated corrugated plates, whereas under the same conditions the degradation rate was only 12 % for a corrugated reactor without a catalyst coating, and 4 % for a no‐plate reactor. The methylene blue degradation was described by the Langmuir‐Hinshelwood model, and the apparent photonic efficiency of the corrugated arrangement was found to be in the range of 1.53–2.83 % when half the initial concentration was degraded. The local area specific rate of energy absorption (LASREA) profile over the plates was determined from a model developed based on UV‐C light irradiation distribution and plate configuration. Light intensity measurements were carried out and were found to correlate with this model. A set of corrugated plate photocatalytic reactors with different geometries, but with the same coated area, were then analyzed and absorbed UV light intensities were integrated to determine the best geometry.

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Mass transfer measurements and modeling in a microchannel photocatalytic reactor

Cited by 40 publications

References 20 publications

Intensification of photocatalytic pollutant abatement in microchannel reactor using TiO₂ and TiO₂‐graphene

Intensification of photocatalytic pollutant abatement in microchannel reactor using TiO₂ and TiO₂‐graphene

Kinetic study of photocatalytic degradation of Ifos famide in a microchannel and simulation

A corrugated plate photocatalytic reactor for degradation of waterborne organic contaminants

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Mass transfer measurements and modeling in a microchannel photocatalytic reactor

Cited by 40 publications

References 20 publications

Intensification of photocatalytic pollutant abatement in microchannel reactor using TiO2 and TiO2‐graphene

Intensification of photocatalytic pollutant abatement in microchannel reactor using TiO2 and TiO2‐graphene

Kinetic study of photocatalytic degradation of Ifos famide in a microchannel and simulation

A corrugated plate photocatalytic reactor for degradation of waterborne organic contaminants

Contact Info

Product

Resources

About

Intensification of photocatalytic pollutant abatement in microchannel reactor using TiO₂ and TiO₂‐graphene

Intensification of photocatalytic pollutant abatement in microchannel reactor using TiO₂ and TiO₂‐graphene