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Hemijski reaktori sa oscilirajućim tokom fluida

dc.creatorSlavnić, Danijela
dc.creatorBugarski, Branko
dc.creatorNikačević, Nikola
dc.date.accessioned2021-03-10T12:22:08Z
dc.date.available2021-03-10T12:22:08Z
dc.date.issued2014
dc.identifier.issn0367-598X
dc.identifier.urihttp://TechnoRep.tmf.bg.ac.rs/handle/123456789/2629
dc.description.abstractGlobal market competition, increase in energy and other production costs, demands for high quality products and reduction of waste are forcing pharmaceutical, fine chemicals and biochemical industries, to search for radical solutions. One of the most effective ways to improve the overall production (cost reduction and better control of reactions) is a transition from batch to continuous processes. However, the reactions of interests for the mentioned industry sectors are often slow, thus continuous tubular reactors would be impractically long for flow regimes which provide sufficient heat and mass transfer and narrow residence time distribution. The oscillatory flow reactors (OFR) are newer type of tube reactors which can offer solution by providing continuous operation with approximately plug flow pattern, low shear stress rates and enhanced mass and heat transfer. These benefits are the result of very good mixing in OFR achieved by vortex generation. OFR consists of cylindrical tube containing equally spaced orifice baffles. Fluid oscillations are superimposed on a net (laminar) flow. Eddies are generated when oscillating fluid collides with baffles and passes through orifices. Generation and propagation of vortices create uniform mixing in each reactor cavity (between baffles), providing an overall flow pattern which is close to plug flow. Oscillations can be created by direct action of a piston or a diaphragm on fluid (or alternatively on baffles). This article provides an overview of oscillatory flow reactor technology, its operating principles and basic design and scale-up characteristics. Further, the article reviews the key research findings in heat and mass transfer, shear stress, residence time distribution in OFR, presenting their advantages over the conventional reactors. Finally, relevant process intensification examples from pharmaceutical, polymer and biofuels industries are presented.en
dc.description.abstractEkonomski i ekološki pritisci, kao što su globalna konkurencija, povećanje energetskih i drugih troškova proizvodnje, zahtevi za visokim kvalitetom proizvoda i smanjenje otpada, primoravaju farmaceutsku, finu hemijsku i biohemijsku industriju na radikalne promene u proizvodnji. Jedan od efikasnih načina za sveobuhvatno poboljšanje proizvodnje (smanjenje troškova i bolju kontrolu reakcije) je prelazak sa tradicionalno šaržnih procesa na kontinualne. Međutim, reakcije od interesa za pomenute industrijske sektore su često spore, pa bi kontinualni cevni reaktori trebalo da budu nepraktično velikih dužina za režime strujanja koji obezbeđuju zadovoljavajuće prenose toplote i mase i uske raspodele vremena zadržavanja. Reaktori sa oscilirajućim tokom fluida (ROT) nude rešenje jer obezbeđuju kontinualni rad, strujanje blisko klipnom, visoke prenose mase i toplote, a pri tom se mogu koristiti male brzine strujanja, te su reaktori prihvatljivih dužina za spore reakcije. Ove pozitivne karakteristike se ostvaruju zbog jako dobrog mešanja u reaktoru, usled stvaranja vrtloga pri sudaru generisanog talasa fluida sa internim pregradama. Osim navedenih prednosti u ROT se obezbeđuju i niži smicajni naponi (za isti unos energije) u odnosu na reaktore sa mehaničkim mešalicama, što je značajno za aplikacije u biohemijskom i biomedicinskom inženjerstvu. U ovom preglednom radu je predstavljen princip rada ovih reaktora, različite konstrukcije i osnovni kriterijumi za projektovanje. Prikazani su reprezentativni rezultati istraživanja, koji jasno potvrđuju prednosti ovih uređaja u odnosu na konvencionalne i navedeni su primeri intenzifikacije procesa primenom ROT u različitim industrijskim sektorima, kao što su farmaceutski, polimerni, biogoriva, prerada otpadnih voda i dr.sr
dc.publisherAssociation of Chemical Engineers of Serbia
dc.relationinfo:eu-repo/grantAgreement/MESTD/Basic Research (BR or ON)/172022/RS//
dc.relationinfo:eu-repo/grantAgreement/MESTD/Integrated and Interdisciplinary Research (IIR or III)/46001/RS//
dc.relationinfo:eu-repo/grantAgreement/MESTD/Basic Research (BR or ON)/172022/RS//
dc.rightsopenAccess
dc.rights.urihttps://creativecommons.org/licenses/by-nc-nd/4.0/
dc.sourceHemijska industrija
dc.subjectProcess intensificationen
dc.subjectOscillatory flow reactorsen
dc.subjectBatch to continuous processesen
dc.subjectOscillatory flow mixingen
dc.subjectintenzifikacija procesasr
dc.subjectreaktori sa oscilirajućim tokomsr
dc.subjectšaržni ka kontinualnim procesimasr
dc.subjectmešanje pomoću oscilacija fluidasr
dc.titleOscillatory flow chemical reactorsen
dc.titleHemijski reaktori sa oscilirajućim tokom fluidasr
dc.typearticle
dc.rights.licenseBY-NC-ND
dc.citation.epage379
dc.citation.issue3
dc.citation.other68(3): 363-379
dc.citation.rankM23
dc.citation.spage363
dc.citation.volume68
dc.identifier.doi10.2298/HEMIND130419062S
dc.identifier.fulltexthttp://TechnoRep.tmf.bg.ac.rs/bitstream/id/9141/0367-598X1300062S.pdf
dc.identifier.scopus2-s2.0-84904092574
dc.identifier.wos000339707000011
dc.type.versionpublishedVersion


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