Modeling and geometry optimization of photochemical reactors: Single- and multi-lamp reactors for UV–H2O2 AOP systems

Coenen, Tamara; Moortel, Wim Van de; Logist, Filip; Luyten, Jan; Impe, Jan Van; Degrève, Jan

doi:10.1016/j.ces.2013.03.056

Cited by 16 publications

(9 citation statements)

References 37 publications

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“…There is a large knowledge base for plasma-liquid modeling that can be transferred from the AOP community in the context of removing pollutants from water [239,240]. This knowledge base includes the photolysis of water and impurities [241,242], radiation transport [243] and rate coefficients for reaction of reactive oxygen species (ROS) with organic and molecular species [184]. Synergetic effects of photochemistry and sonochemistry are also investigated [244].…”

Section: Introductionmentioning

confidence: 99%

Plasma–liquid interactions: a review and roadmap

Bruggeman

Kushner

Locke

et al. 2016

Plasma Sources Sci. Technol.

1,291

885

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Plasma-liquid interactions represent a growing interdisciplinary area of research involving plasma science, fluid dynamics, heat and mass transfer, photolysis, multiphase chemistry and aerosol science. This review provides an assessment of the state-of-the-art of this multidisciplinary area and identifies the key research challenges. The developments in diagnostics, modeling and further extensions of cross section and reaction rate databases that are necessary to address these challenges are discussed. The review focusses on nonequilibrium plasmas.

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Section: Introductionmentioning

confidence: 99%

Plasma–liquid interactions: a review and roadmap

Bruggeman

Kushner

Locke

et al. 2016

Plasma Sources Sci. Technol.

1,291

885

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“…Among all types of photoreactors, annular photochemical reactors are the most frequently used to perform photochemically enhanced advanced oxidation processes [80,81]. The reactors in this category consist of a vessel in which one or more UV lamps are located in various positions, usually parallel with the vessel axis of symmetry, to irradiate the reaction mass as uniformly as possible.…”

Section: Problem Statementmentioning

confidence: 99%

Residence Time Distribution: Literature Survey, Functions, Mathematical Modeling, and Case Study—Diagnosis for a Photochemical Reactor

Nechita,

Suditu,

Puițel

et al. 2023

Processes

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This paper aims to provide an overview of the fundamentals, development, and evolution of residence time distribution (RTD) methodology and its applications to the flow and mixing of fluids (and solid particles) modeling in different systems. A concise literature analysis is followed by a succinct presentation of RTD methodology’s experimental and theoretical foundations and RTD-based mathematical modeling, highlighting its importance. An experimental demonstration of RTD diagnostics on a photochemical reactor is performed to identify the most practical locations for the inlet/outlet pipes (axial or radial) and the photochemical reactor’s ideal working posture (horizontal, vertical, or inclined) and to understand the level of mixing and to determine the fluid flow defects. Using the relevant RTD functions and the corresponding central moments, it was possible to show that short circuits and dead zones occurred in each of the six considered reactor configurations. Following these investigations, design solutions were proposed to achieve a convenient exposure time, proper mixing, and uniform irradiation inside the reactor.

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“…Although increasing the concentration of hydrogen peroxide produces more hydroxyl radicals, which facilitate dye decolorization, increasing the concentration of H2O2 above the critical concentration reduces the rate of dye destruction due to hydroxyl radical scavenger generation rather than free radical production (Banat et al, 2005). Furthermore, high energy waves (such as UV and ultrasound) will increase the primary oxidant as well as the production of hydroxyl radicals (Coenen et al, 2013). In addition, combining ultrasound with UV will improve the initial reaction rate and overall dye removal efficiency (Fung et al, 2000).…”

Section: Reaction Kineticsmentioning

confidence: 99%

Design of a new fountain reactor for contamination degradation using advanced oxidation processes with hybrid techniques and modeling evaluation

Ghamsari

Mohseni

Esmaeilian

et al. 2022

Preprint

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Due to the water and energy crises, wastewater treatment systems that are more energy efficient and capable of large volume degradation are a priority. Photochemical decomposition methods have a significant impact on pollutant treatment. The use of these methods in conjunction with a novel designed reactor and hybridization processes can result in considerable treatment results. This research used a fountain system in a UV/H2O2 process to generate a belt-type liquid film with a low thickness and high mixing to remove methyl orange as a model pollutant. The flowrate, H2O2 concentration, temperature, and UV intensity were the parameters evaluated in this series of tests. After 90 minutes under optimum conditions, the maximum degradation of methyl orange was 99.73 percent. The efficiency of the purification process was increased to 99 percent in 75 minutes by using the optimum state of hybridization of UV/US/H2O2 processes. Two deep neural network models and a pseudo-first-order kinetic model were created to fit the experimental data. The results reveal a good fit between the experimental data and the model prediction. The discovered synergistic factor (1.168) and energy yield (2.65 g/kWh) demonstrated the high efficiency of the hybridization process and the outstanding function of the designed system, respectively.

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Modeling and geometry optimization of photochemical reactors: Single- and multi-lamp reactors for UV–H2O2 AOP systems

Cited by 16 publications

References 37 publications

Plasma–liquid interactions: a review and roadmap

Plasma–liquid interactions: a review and roadmap

Residence Time Distribution: Literature Survey, Functions, Mathematical Modeling, and Case Study—Diagnosis for a Photochemical Reactor

Design of a new fountain reactor for contamination degradation using advanced oxidation processes with hybrid techniques and modeling evaluation

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