Spectral radiative analysis of bio-inspired H2 production in a benchmark photoreactor: A first investigation using spatial photonic balance

Supplis, Caroline; Gros, Fabrice; Dahi, Ghiles; Dauchet, Jérémi; Roudet, Matthieu; Gloaguen, Frédéric; Cornet, Jean‐François

doi:10.1016/j.ijhydene.2018.03.097

Cited by 9 publications

(15 citation statements)

References 43 publications

(78 reference statements)

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“…5.1.1 Photocatalytic system preparation. The catalyst synthesis and the photocatalytic system solution preparation protocols are detailed in [18,21].…”

Section: Methodsmentioning

confidence: 99%

“…Local coupling is required because the local volumetric rate of photons absorbed (LVRPA) field AðrÞ is highly heterogeneous when most of the incident radiation is absorbed in the vessel, which is the aim of photoreactive processes. Nevertheless, if the quantum yield φ does not depend on the radiation field, which is often the case for molecular photoreactive systems as studied in this article, averaging these two rates at the spatial scale of the enclosure (the scale of physical observable and measured quantities) is straightforward and leads to a linear thermokinetic coupling law [18,19]:…”

Section: Plos Onementioning

confidence: 99%

“…Finally, in section 5 the implementation of the proposed method will make it possible to revisit results already published regarding the use of a bio-inspired catalyst for the production of H 2 in photoreactors, where the fluorescence of Eosin Y was neglected [18]. This will enable us to accurately estimate the overall quantum yields φ and thus to refine the performances achievable by this kind of photoreactive system.…”

Section: Plos Onementioning

confidence: 99%

“…In a previous publication [18], the overall quantum yield of bio-inspired H 2 production implemented in a benchmark photoreactor was estimated without taking into account luminescence. Hereafter we revisit these results and discuss the effects of luminescence on quantum yield measurements.…”

Section: Practical Implementation For Overall Quantum Yield Estimationmentioning

confidence: 99%

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Radiative analysis of luminescence in photoreactive systems: Application to photosensitizers for solar fuel production

et al. 2021

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Most chemical reactions promoted by light and using a photosensitizer (a dye) are subject to the phenomenon of luminescence. Redistribution of light in all directions (isotropic luminescence emission) and in a new spectral range (luminescence emission spectrum) makes experimental and theoretical studies much more complex compared to a situation with a purely absorbing reaction volume. This has a significant impact on the engineering of photoreactors for industrial applications. Future developments associated with photoreactive system optimization are therefore extremely challenging, and require an in-depth description and quantitative analysis of luminescence. In this study, a radiative model describing the effect of luminescence radiation on the calculation of absorptance is presented and analyzed with the multiple inelastic-scattering approach, using Monte Carlo simulations. The formalism of successive orders of scattering expansion is used as a sophisticated analysis tool which provides, when combined with relevant physical approximations, convenient analytical approximate solutions. Its application to four photosensitizers that are representative of renewable hydrogen production via artificial photosynthesis indicates that luminescence has a significant impact on absorptance and on overall quantum yield estimation, with the contribution of multiple scattering and important spectral effects due to inelastic scattering. We show that luminescence cannot be totally neglected in that case, since photon absorption lies at the root of the chemical reaction. We propose two coupled simple and appropriate analytical approximations enabling the estimation of absorptance with a relative error below 6% in every tested situation: the zero-order scattering approximation and the gray single-scattering approximation. Finally, this theoretical approach is used to determine and discuss the overall quantum yield of a bio-inspired photoreactive system with Eosin Y as a photosensitizer, implemented in an experimental setup comprising a photoreactor dedicated to hydrogen production.

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“…5.1.1 Photocatalytic system preparation. The catalyst synthesis and the photocatalytic system solution preparation protocols are detailed in [18,21].…”

Section: Methodsmentioning

confidence: 99%

Section: Plos Onementioning

confidence: 99%

Section: Plos Onementioning

confidence: 99%

Section: Practical Implementation For Overall Quantum Yield Estimationmentioning

confidence: 99%

See 2 more Smart Citations

Radiative analysis of luminescence in photoreactive systems: Application to photosensitizers for solar fuel production

et al. 2021

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“…The photoreactors design and concepts vary based on the working regime (static or dynamic), photocatalyst morphology (powders or bulk) and liquid volume [60][61][62]. The photoreactors using suspension photocatalysts benefit from the advantage of the simple design and high specific photocatalyst surface area.…”

Section: Photocatalytic Reactors For Wastewater Treatment: Working Principles and Componentsmentioning

confidence: 99%

The Influence of Photocatalytic Reactors Design and Operating Parameters on the Wastewater Organic Pollutants Removal—A Mini-Review

Eneşca

2021

Catalysts

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The organic pollutants removal by conventional methods (adsorption, coagulation, filtration, microorganism and enzymes) showed important limitation due to the reluctance of these molecules. An alternative to this issue is represented by the photocatalytic technology considered as an advanced oxidation process (AOP). The photoreactors design and concepts vary based on the working regime (static or dynamic), photocatalyst morphology (powders or bulk) and volume. This mini-review aims to provide specific guidelines on the correlations between the photoreactor concept characteristics (working regime, volume and flow rate), irradiation scenarios (light spectra, irradiation period and intensity) and the photocatalytic process parameters (photocatalyst materials and dosage, pollutant type and concentration, pollutant removal efficiency and constant rate). The paper considers two main photoreactor geometries (cylindrical and rectangular) and analyses the influence of parameters optimization on the overall photocatalytic efficiency. Based on the systematic evaluation of the input data reported in the scientific papers, several perspectives regarding the photocatalytic reactors' optimization were included.

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The photocatalytic process in the treatment of polluted water

2022

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Wastewaters often contain toxic organic pollutants with a possible adverse effect on human health and aquatic life upon exposure. Persistent organic pollutants such as dyes and pesticides, pharmaceuticals, and other chemicals are gaining extensive attention. Water treatment utilizing photocatalysis has recently received a lot of interest. Photocatalysis is cutting-edge, alternative technology. It has various advantages, including functioning at normal temperatures and atmospheric pressure, cheap prices, no secondary waste creation, and being readily available and easily accessible. This review presented a comprehensive overview of the advances in the application of the photocatalytic process in the treatment of highly polluted industrial wastewater. The analysis of various literature revealed that TiO 2 -based photocatalysts are highly effective in degrading organic pollutants from wastewater compared to other forms of wastewater treatment technologies. The electrical structure of a semiconductor plays a vital role in the photocatalyst's mechanism. The morphology of a photocatalyst is determined by the synthesis method, chemical content, and technical characteristics. The scaled-up of the photoreactors will significantly help in curbing the effect of organic pollutants in wastewater.

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Spectral radiative analysis of bio-inspired H2 production in a benchmark photoreactor: A first investigation using spatial photonic balance

Cited by 9 publications

References 43 publications

Radiative analysis of luminescence in photoreactive systems: Application to photosensitizers for solar fuel production

Radiative analysis of luminescence in photoreactive systems: Application to photosensitizers for solar fuel production

The Influence of Photocatalytic Reactors Design and Operating Parameters on the Wastewater Organic Pollutants Removal—A Mini-Review

The photocatalytic process in the treatment of polluted water

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