Strukturirani katalizatori dizajnirani i pripremljeni postupcima 3D ispisa

undergraduate thesis

• Title (english): Structured catalysts designed and manufactured by 3D printing
• Author: Kristina Novaković
• Mentor: Vesna Tomašić (mentor)
• Committee member: Vesna Tomašić (predsjednik povjerenstva)
• Committee member: Filip Car (član povjerenstva)
• Committee member: Domagoj Vrsaljko (član povjerenstva)
• Granter: University of Zagreb; Faculty of Chemical Engineering and Technology; Zagreb
• Defense date and country: 2023-09-18, Croatia
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Chemical Engineering

Abstract

Stereolitografija, jedna od tehnika aditivne proizvodnje, korištena je za izradu monolitnih nosača katalizatora primjenom fotoosjetljive smole Ceramic resin. Tijekom eksperimentalnog dijela rada izrađeni su strukturirani monolitni nosači katalizatora, primjenom tehnologije
3D-ispisa te su potom korišteni za katalitičku oksidaciju toluena. Na pripremljene strukturirane nosače prethodno je nanesena katalitički aktivna komponenta (MnFeOx) postupkom mokre impregnacije. Ukupno je izrađeno 7 funkcionalnih uzoraka 3D-ispisanih monolitnih nosača katalizatora kako bi se mogao opisati utjecaj različitih omjera Mn i Fe u katalitički aktivnom sloju na katalitičku oksidaciju toluena. Rezultati ispitivanja adhezije katalitičkog sloja na monolitnim nosačima pokazali su izvrsne rezultate s vrlo malim odstupanjima nakon 20 minuta izloženosti djelovanju ultrazvuka radne frekvencije 37 kHz. Učinkovitost pojedinih monolitnih katalizatora praćena je metodom plinske kromatografije. Izmjerene su konverzije toluena pri različitim temperaturama te su određene vrijednosti T10, T50 i T90 koje odgovaraju temperaturama pri kojima su postignute konverzije od 10 %, 50 % i 90 %. Nađeno je da se potpuna konverzija toluena na pripremljenim monolitnim katalizatorima postiže pri temperaturama između 200 i 240 °C. Također je zaključeno je da se maksimalna učinkovitost miješanog oksida MnFeOx može se postići optimiranjem uvjeta pripreme i pažljivim izborom omjera Mn i Fe. Najučinkovitijim se pokazao monolitni katalizator s omjerom Mn:Fe = 2:1.

Abstract (english)

Stereolithography, one of the additive manufacturing techniques, was used to fabricate monolithic catalyst carriers the photosensitive resin Ceramic resin. During the experimental part of the work, structured monolithic catalyst carriers were prepared, which were then used for the catalytic oxidation of toluene. A catalytically active component (MnFeOx) was previously applied to the fabricated structured carrriers by wet impregnation. A total of 7 functional samples of 3D-printed monolithic catalyst carriers were made in order to describe the influence of different ratios of Mn and Fe in the catalytically active layer on the catalytic oxidation of toluene. The results of the adhesion test of the catalytic layer on the monolithic supports showed excellent results with very small deviations after 20 minutes of exposure to ultrasound at an operating frequency of 37 kHz for 20 minutes. The efficiency of individual monolithic catalysts was monitored by gas chromatography. The conversions of toluene were measured at different temperatures and the values T10, T50, and T90 were determined, corresponding to the temperatures at which conversions of 10%, 50%, and 90% were obtained. It was found that the complete conversion of toluene on the prepared monolithic catalysts is achieved at temperatures between 200 and 240 °C. It was also found that the maximum efficiency of the mixed oxide MnFeOx can be achieved by optimization of the preparation conditions and careful choice of the ratio of Mn and Fe. The monolithic catalyst with the ratio Mn:Fe = 2:1 proved to be the most effective.

• Keywords: aditivna proizvodnja; monolitni nosači katalizatora; mokra impregnacija; toluen; katalitička oksidacija
• Keywords (english): additive manufacturing; monolithic catalytic carriers; wet impregnation; toluene; catalytic oxidation
• Language: croatian
• URN:NBN: urn:nbn:hr:149:852509
• Study programme: Title: Chemical Engineering - Undergraduate study; Study programme type: university; Study level: undergraduate; Academic / professional title: sveučilišni/a prvostupnik/prvostupnica (baccalaureus/baccalaurea) inženjer/inženjerka kemijskog inženjerstva (sveučilišni/a prvostupnik/prvostupnica (baccalaureus/baccalaurea) inženjer/inženjerka kemijskog inženjerstva)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Open access
• Created on: 2023-11-27 14:24:58