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Phosphorus Dosing during Catalytic n -Butane Oxidation in a μ-Reactor: A Proof of Concept

Anderson, Scott D.; Kutscherauer, Martin ORCID iD icon; Nickel, Nicolas; Böcklein, Sebastian; Mestl, Gerhard; Wehinger, Gregor D. ORCID iD icon 1; Turek, Thomas
1 Institut für Chemische Verfahrenstechnik (CVT), Karlsruher Institut für Technologie (KIT)

Abstract:

The selectiveoxidationofn-butaneto maleicanhydrideover vanadium−phosphorusoxide catalystsis subjectto a dynamicchangein the catalystactivity.This phenomenoniscalled phosphorusdynamicsand plays a vital role in the predictionof catalyticreactionrates, but to date, no modelsmeasuredundertransportlimitationfree conditionshave been published.Thisstudy presentsthe first investigationof the phosphorusdynamicsover extendedperiodsof time (multipledays on stream)undertransportlimitationfree conditionsin aμ-fixed-bedreactor.Initially,temperaturevariationexperimentsare conductedtoinvestigatewhetherphosphorusdynamicstakes place in aμ-reactorand to determinethe onset of phosphorusloss. Then,asetup for dosingof liquid organophosphorousspecieson the scaleof nL min−1is proposed,and functionalityis demonstratedvia step test experiments.Resultsof the temperaturevariationshowedthat phosphorusloss occursin theμ-reactorbut starts at temperaturesexceedingthose of industrialscale reactorsby 30−80K. It wasfurtherobservedthat additionof steamto the feed increasesthe intensityof the phosphorusdynamicsand lowersthe onsettemperature.Step test resultsdemonstratedthe functionalityof the dosingsetup if a suitableinert materialis chosenand the metalsurfacesdownstreamthe dosingare treatedaccordingto a passivationprocedureproposedin this study.The additionof steamappearsto be requiredfor appropriatedistributionof the dosedorganophosphorousspeciesover the catalystbed.


Verlagsausgabe §
DOI: 10.5445/IR/1000165051
Veröffentlicht am 29.11.2023
Postprint §
DOI: 10.5445/IR/1000165051/post
Veröffentlicht am 29.11.2023
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Chemische Verfahrenstechnik (CVT)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2023
Sprache Englisch
Identifikator ISSN: 0888-5885, 1520-5045
KITopen-ID: 1000165051
Erschienen in Industrial & Engineering Chemistry Research
Verlag American Chemical Society (ACS)
Band 62
Heft 47
Seiten 20142-20151
Vorab online veröffentlicht am 14.11.2023
Nachgewiesen in Dimensions
Web of Science
Scopus
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