Design and 3D printing of static mixers for tubular reactor

Autor: Muhar, Vedran
Přispěvatelé: Vrsaljko, Domagoj
Jazyk: chorvatština
Rok vydání: 2021
Předmět:
Popis: Aditivna proizvodnja posjeduje karakteristike tražene za primjenu u industriji, a to su: brzina, jeftina cijena, jednostavnost i dostupnost. Njenom se primjenom ubrzava vrijeme potrebno za izradu potrebnih kalupa ili modela. Svoju primjenu nalazi i u kemijskom reakcijskom inženjerstvu gdje se može koristiti za izradu kemijskih reaktora, ali i izradu statičkih miješalica kao u ovom radu. U ovom je radu potvrđena teza kako je moguće 3D-ispisati statičku miješalicu za cijevni reaktor zadanih dimenzija, te ju prevući katalitički aktivnim filmom. Model statičke miješalice dizajniran je u programu Fusion 360, obrađen u slicer programu PreForm, a zatim 3D-ispisan stereolitografskom metodom na 3D-pisaču Form 2. Statička miješalica za primjenu u cijevnim reaktorima ispisana je materijalom Clear V2 uz debljinu sloja od 0,1 mm. Za izradu koktela kojim se prevlačila miješalica korišteni su: etanol, tetraetoksisilan (TEOS), feniltrimetoksisilan (FTMS), TiO2 i klorovodična kiselina. Etanol je otapalo, TEOS i FTMS su prekursori sol-gel postupka, TiO2 daje fotokatalitička svojstva filmu, dok je klorovodična kiselina imala ulogu katalizatora sol-gel postupka. Statička miješalica uronjena je u koktel metodom nekontroliranog uranjanja (engl. drop-coating) kako bi se nanio film na površinu miješalice. Nakon nanošenja i sušenja, svojstva filma ispitana su digitalnim mikroskopom i analizom na FTIR-ATR uređaju. Površina miješalice uspješno je prevučena katalitički aktivnim filmom. Površina filma pokazuje nastanak pukotina, a FTIR analiza pokazuje prisustvo Ti-O-Ti i Ti-O veza. Additive manufacturing has characteristics that are needed for industrial use. These are speed, low cost, simplicity, and availability. The use of additive manufacturing can reduce the time required to make casts and models. Additive manufacturing has applications in chemical reaction engineering where it can be used for the fabrication of chemical reactors and also for the fabrication of static mixers. In this work, the thesis of the possibility of printing the static mixer for a tubular reactor with given dimensions and coated with the catalytically active film was confirmed. The model of the static mixer was designed in the software Fusion 360, processed in the software PreForm slicer and 3D printed by the method of stereolithography on the 3D printer Form 2. The static mixer designed for tubular reactors was printed using Clear V2 material with 0.1 mm layer thickness. The following ingredients were used to prepare the cocktail used to coat the static mixer: Ethanol, tetraethoxysilane (TEOS), trimethoxyphenylsilane (FTMS), TiO2, and hydrochloric acid. Ethanol is used for a solution, TEOS and FTMS are precursors of the sol-gel process, TiO2 imparts photocatalytic properties to the film, and hydrochloric acid is the catalyst of the sol-gel process. The static mixer was coated using the drop coating method. After coating and drying, the film properties were investigated by digital microscope and FTIR-ATR analysis. The surface of the static mixer was successfully coated with the catalytically active film. The film surface shows cracking, and FTIR-ATR analysis reveals the presence of Ti-O-Ti and Ti-O bonds.
Databáze: OpenAIRE
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