Please use this identifier to cite or link to this item: https://doi.org/10.15480/882.4576
DC FieldValueLanguage
dc.contributor.authorFrey, Torben-
dc.contributor.authorKexel, Felix-
dc.contributor.authorDittmer, Kayla Reata-
dc.contributor.authorBohne, Sven-
dc.contributor.authorHoffmann, Marko-
dc.contributor.authorTrieu, Hoc Khiem-
dc.contributor.authorSchlüter, Michael-
dc.date.accessioned2022-09-05T08:48:05Z-
dc.date.available2022-09-05T08:48:05Z-
dc.date.issued2022-06-06-
dc.identifier.citationFrontiers in Chemical Engineering 4 (): 874019 (2022-06-06)de_DE
dc.identifier.issn2673-2718de_DE
dc.identifier.urihttp://hdl.handle.net/11420/13545-
dc.description.abstractModular milli- and micro-structured systems represent a promising approach to exploit the potential of micro-process technology, including precise reaction control and scale-up. A major drawback of micro-structured devices is fouling and mixing mechanisms need to be investigated phenomenologically to better understand the processes that lead to fouling. Previous work was conducted to resolve 3D concentration fields by means of Laser-Induced Fluorescence (LIF) using a Confocal Laser Scanning Microscope (CLSM) (Frey et al., J Flow Chem, 2021, 11, 599–609). While the CLSM-LIF method yields detailed insight into concentration fields down to a few micrometers, it is limited to stationary flow structures only. Aubin et al. (Chemical Engineering Science, 2010, 65, 2065–2093) give a comprehensive review of methods to analyze mixing behavior. Most recent optical measurement methods rely on the detection of a single compound in mixtures. In case of reactive mixing, Tthe state of the art procedures to locally visualize micro mixing relies on tracking a reaction product which forms on molecular scale. In literature, only small micro-structures are manufactured from transparent materials, however larger milli-structures often lack optical accesses with sufficient quality. Selective laser-induced etching (SLE) is a new technique which enables the fabrication of larger milli-structures in transparent materials that are relevant for industry-scale applications. This work develops a method based on a concept of Kexel et al. (Chemie Ingenieur Technik, 2021, 93, 830–837) visualizing the selectivity of a competitive-consecutive gas-liquid reaction in a Taylor bubble flow. The main goal of this work is the analysis of the absorbance spectra of bromothymol blue (BTB) at different pH values in a miscible liquid-liquid system in a fused silica split-and-recombine mixer. The milli-structure of the mixer is manufactured by means of SLE. Backlight at different wavelengths is pulsed matching the recording frequency. In contrast to conventional UV/Vis setups, the absorbance is recorded locally within the mixer. The proposed method yields the 2D concentration distribution of multiple species with high spatial resolution. The spatially resolved reactant and product distribution unveils micro mixing and can yield important information about local root causes of fouling.-
dc.description.abstractModular milli- and micro-structured systems represent a promising approach to exploit the potential of micro-process technology, including precise reaction control and scale-up. A major drawback of micro-structured devices is fouling and mixing mechanisms need to be investigated phenomenologically to better understand the processes that lead to fouling. Previous work was conducted to resolve 3D concentration fields by means of Laser-Induced Fluorescence (LIF) using a Confocal Laser Scanning Microscope (CLSM) (Frey et al., J Flow Chem, 2021, 11, 599–609). While the CLSM-LIF method yields detailed insight into concentration fields down to a few micrometers, it is limited to stationary flow structures only. Aubin et al. (Chemical Engineering Science, 2010, 65, 2065–2093) give a comprehensive review of methods to analyze mixing behavior. Most recent optical measurement methods rely on the detection of a single compound in mixtures. In case of reactive mixing, Tthe state of the art procedures to locally visualize micro mixing relies on tracking a reaction product which forms on molecular scale. In literature, only small micro-structures are manufactured from transparent materials, however larger milli-structures often lack optical accesses with sufficient quality. Selective laser-induced etching (SLE) is a new technique which enables the fabrication of larger milli-structures in transparent materials that are relevant for industry-scale applications. This work develops a method based on a concept of Kexel et al. (Chemie Ingenieur Technik, 2021, 93, 830–837) visualizing the selectivity of a competitive-consecutive gas-liquid reaction in a Taylor bubble flow. The main goal of this work is the analysis of the absorbance spectra of bromothymol blue (BTB) at different pH values in a miscible liquid-liquid system in a fused silica split-and-recombine mixer. The milli-structure of the mixer is manufactured by means of SLE. Backlight at different wavelengths is pulsed matching the recording frequency. In contrast to conventional UV/Vis setups, the absorbance is recorded locally within the mixer. The proposed method yields the 2D concentration distribution of multiple species with high spatial resolution. The spatially resolved reactant and product distribution unveils micro mixing and can yield important information about local root causes of fouling.en
dc.language.isoende_DE
dc.publisherFrontiers Media S.A.de_DE
dc.relation.ispartofFrontiers in chemical engineeringde_DE
dc.rightsCC BY 4.0de_DE
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/de_DE
dc.subjectmicro mixingde_DE
dc.subjectselective laser-induced etching (SLE)de_DE
dc.subjectimaging UV/Vis spectroscopyde_DE
dc.subjectreactive mixingde_DE
dc.subjectprocess intensificationde_DE
dc.subject.ddc600: Technikde_DE
dc.subject.ddc620: Ingenieurwissenschaftende_DE
dc.titleA novel approach for visualizing mixing phenomena of reactive liquid-liquid flows in milli- and micro-channelsde_DE
dc.typeArticlede_DE
dc.date.updated2022-09-03T23:09:06Z-
dc.identifier.doi10.15480/882.4576-
dc.type.diniarticle-
dcterms.DCMITypeText-
tuhh.identifier.urnurn:nbn:de:gbv:830-882.0195919-
tuhh.oai.showtruede_DE
tuhh.abstract.englishModular milli- and micro-structured systems represent a promising approach to exploit the potential of micro-process technology, including precise reaction control and scale-up. A major drawback of micro-structured devices is fouling and mixing mechanisms need to be investigated phenomenologically to better understand the processes that lead to fouling. Previous work was conducted to resolve 3D concentration fields by means of Laser-Induced Fluorescence (LIF) using a Confocal Laser Scanning Microscope (CLSM) (Frey et al., J Flow Chem, 2021, 11, 599–609). While the CLSM-LIF method yields detailed insight into concentration fields down to a few micrometers, it is limited to stationary flow structures only. Aubin et al. (Chemical Engineering Science, 2010, 65, 2065–2093) give a comprehensive review of methods to analyze mixing behavior. Most recent optical measurement methods rely on the detection of a single compound in mixtures. In case of reactive mixing, Tthe state of the art procedures to locally visualize micro mixing relies on tracking a reaction product which forms on molecular scale. In literature, only small micro-structures are manufactured from transparent materials, however larger milli-structures often lack optical accesses with sufficient quality. Selective laser-induced etching (SLE) is a new technique which enables the fabrication of larger milli-structures in transparent materials that are relevant for industry-scale applications. This work develops a method based on a concept of Kexel et al. (Chemie Ingenieur Technik, 2021, 93, 830–837) visualizing the selectivity of a competitive-consecutive gas-liquid reaction in a Taylor bubble flow. The main goal of this work is the analysis of the absorbance spectra of bromothymol blue (BTB) at different pH values in a miscible liquid-liquid system in a fused silica split-and-recombine mixer. The milli-structure of the mixer is manufactured by means of SLE. Backlight at different wavelengths is pulsed matching the recording frequency. In contrast to conventional UV/Vis setups, the absorbance is recorded locally within the mixer. The proposed method yields the 2D concentration distribution of multiple species with high spatial resolution. The spatially resolved reactant and product distribution unveils micro mixing and can yield important information about local root causes of fouling.de_DE
tuhh.publisher.doi10.3389/fceng.2022.874019-
tuhh.publication.instituteMehrphasenströmungen V-5de_DE
tuhh.publication.instituteMikrosystemtechnik E-7de_DE
tuhh.identifier.doi10.15480/882.4576-
tuhh.type.opus(wissenschaftlicher) Artikel-
dc.type.driverarticle-
dc.type.casraiJournal Article-
tuhh.container.volume4de_DE
dc.relation.projectKoPPonA2.0; Entwicklung von modularen, intelligenten, gegen Belagsbildung resistenten Reaktoren; Teilvorhaben CFD-Modellierung von Belagsbildungsvorgängende_DE
dc.rights.nationallicensefalsede_DE
tuhh.container.articlenumber874019de_DE
local.status.inpressfalsede_DE
local.type.versionpublishedVersionde_DE
datacite.resourceTypeArticle-
datacite.resourceTypeGeneralJournalArticle-
item.fulltextWith Fulltext-
item.cerifentitytypePublications-
item.openairecristypehttp://purl.org/coar/resource_type/c_6501-
item.creatorOrcidFrey, Torben-
item.creatorOrcidKexel, Felix-
item.creatorOrcidDittmer, Kayla Reata-
item.creatorOrcidBohne, Sven-
item.creatorOrcidHoffmann, Marko-
item.creatorOrcidTrieu, Hoc Khiem-
item.creatorOrcidSchlüter, Michael-
item.creatorGNDFrey, Torben-
item.creatorGNDKexel, Felix-
item.creatorGNDDittmer, Kayla Reata-
item.creatorGNDBohne, Sven-
item.creatorGNDHoffmann, Marko-
item.creatorGNDTrieu, Hoc Khiem-
item.creatorGNDSchlüter, Michael-
item.openairetypeArticle-
item.grantfulltextopen-
item.languageiso639-1en-
item.mappedtypeArticle-
crisitem.project.funderBundesministerium für Wirtschaft und Klimaschutz (BMWK)-
crisitem.project.funderid501100006360-
crisitem.project.funderrorid02vgg2808-
crisitem.project.grantno03EN2004H-
crisitem.author.deptMehrphasenströmungen V-5-
crisitem.author.deptMehrphasenströmungen V-5-
crisitem.author.deptMikrosystemtechnik E-7-
crisitem.author.deptMehrphasenströmungen V-5-
crisitem.author.deptMikrosystemtechnik E-7-
crisitem.author.deptMehrphasenströmungen V-5-
crisitem.author.orcid0000-0003-4268-2348-
crisitem.author.orcid0000-0001-5969-2150-
crisitem.author.parentorgStudiendekanat Verfahrenstechnik (V)-
crisitem.author.parentorgStudiendekanat Verfahrenstechnik (V)-
crisitem.author.parentorgStudiendekanat Elektrotechnik, Informatik und Mathematik (E)-
crisitem.author.parentorgStudiendekanat Verfahrenstechnik (V)-
crisitem.author.parentorgStudiendekanat Elektrotechnik, Informatik und Mathematik (E)-
crisitem.author.parentorgStudiendekanat Verfahrenstechnik (V)-
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