Performance of Continuous Micro Photo Reactor – Comparison with Batch Process

Drhova, M.; Hejda, Stanislav; Kristal, J.; Klusoň, Petr

doi:10.1016/j.proeng.2012.07.528

Cited by 12 publications

(6 citation statements)

References 14 publications

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“…308 In conclusion, some 11 1 O 2 microflow reactions have been reported in the literature. [290][291][292][293][294][295][296][297][298][299][300][301][302][303]305,307 As we will see below, relative to microflow about half of this number has been reported for 1 O 2 macroflow reactions.…”

Section: Microphotoreactors With Immobilizedmentioning

confidence: 99%

Using Singlet Oxygen to Synthesize Natural Products and Drugs

2016

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Section: Microphotoreactors With Immobilizedmentioning

confidence: 99%

Using Singlet Oxygen to Synthesize Natural Products and Drugs

2016

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“…[88][89][90] Also performance of such catalyzed reaction in micro reactor arrangement is coming to the fore. [91,92] Immobilization of phthalocyanines on various supports is also well known process but it does not work sufficiently. [93,94] All these processes and many others are performed only at laboratory scale.…”

Section: Advantages and Limitsmentioning

confidence: 99%

Advanced Oxidation Processes (AOPs) – Utilization of Hydroxyl Radical and Singlet Oxygen

Krystyník¹

2022

Biochemistry

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Considering the nature of organic contaminants in water, methods of their oxidative decomposition seem to be most appropriate for their removal from contaminated water. There are a lot of methods of chemical oxidation, however, Advanced Oxidation Processes (AOPs) seem to be the most suitable technologies for organic contaminants removal. AOPs belong to a group of processes that efficiently oxidize organic compounds towards harmless inorganic products such as water or carbon dioxide. The processes have shown great potential in treatment of pollutants of low or high concentrations and have found applications for various types of contamination. The hydroxyl radical (•OH) is oxidizing agent used at AOPs to drive contaminant decomposition. It is a powerful, non-selective chemical oxidant, which reacts very rapidly with most organic compounds. Another strong oxidizing agent, singlet oxygen, can be generated by photosensitization of phthalocyanines. Phthalocyanines are molecules based on pyrrol structures connected mainly with methionine groups (–CH=) having a metallic central atom. Illumination upon specific wavelengths initiates formation of singlet oxygen that attack organic contaminants.

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“…However, it was quickly identified that simple dimension enlarging was doomed to failure, mostly as a result of rapid light attenuation (Bouger–Lambert–Beer Law) and the low solubility of oxygen in the reaction solutions (the primary issues). Thus, the initial focus was on microreactors which used a large surface area to volume ratio to get uniform light distribution across the reaction solution . Applying a similar logic, macroreactors were also designed wherein a thin annular vessel, or coiled tubing, was used to meet the demand for a large surface area for the reaction solution .…”

Section: Figurementioning

confidence: 99%

“…Thus, the initial focus was on microreactors which used al arge surface area to volumer atio to get uniform light distribution acrosst he reactions olution. [4][5][6][7][8][9][10][11][12][13][14][15][16] Applying as imilar logic, macroreactors were also designed wherein at hin annular vessel, or coiled tubing, was used to meet the demand for al arge surface area for the reaction solution. [17,18] The low solubility of oxygen in these reaction solutionsc ontinued to throw up problems.…”

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confidence: 99%

A Novel Nebulizer‐Based Continuous Flow Reactor: Introducing the Use of Pneumatically Generated Aerosols for Highly Productive Photooxidations

et al. 2017

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Abstract:A very effective and highly innovative continuous flow reactor (CFR) for undertaking important large scale photooxidations is presented. Until now, two major issues have obstructed the widespread use of photooxidation CFRs; both problems are nullified by this novel and yet extremely simple reactor design. The first issue related to the detrimental effect of poor oxygen solubility on the rate of the biphasic gas-liquid reactions and the second was the rapid attenuation of light by solutions which severely limited dimension enlarging opportunities. The new and easy to operate reactor works by nebulizing a photooxidation solution inside a cylindrical chamber surrounded by a low energy LED strip; thus, the interfacial area between the two phases is maximized, leading to greatly improved reaction rates and excellent light penetration. This pneumatic nebulizer-based photooxygenation system (NebPhotOX) can use air (as the oxygen source) and very concentrated photooxidation solutions. NebPhotOX has very high productivity and could potentially be scaled up easily to work in an industrial setting.

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Performance of Continuous Micro Photo Reactor – Comparison with Batch Process

Cited by 12 publications

References 14 publications

Using Singlet Oxygen to Synthesize Natural Products and Drugs

Using Singlet Oxygen to Synthesize Natural Products and Drugs

Advanced Oxidation Processes (AOPs) – Utilization of Hydroxyl Radical and Singlet Oxygen

A Novel Nebulizer‐Based Continuous Flow Reactor: Introducing the Use of Pneumatically Generated Aerosols for Highly Productive Photooxidations

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