Design, analysis, fabrication, and mechanical properties investigation of indirect 3d printed zeolite monoliths.

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dc.contributor.authorKOLTSAKIDIS, SAVVASen
dc.date.accessioned2021-08-11T11:48:50Z
dc.date.available2021-08-11T11:48:50Z
dc.date.issued2021-08-11
dc.identifier.urihttps://repository.ihu.edu.gr//xmlui/handle/11544/29733
dc.rightsDefault License
dc.subject3d printingen
dc.subjectadvanced ceramicsen
dc.subjectindirect templateen
dc.subjectCFDen
dc.subjectmonolithen
dc.subjectcatalysten
dc.subjectzeoliteen
dc.subjectmechanical propertiesen
dc.titleDesign, analysis, fabrication, and mechanical properties investigation of indirect 3d printed zeolite monoliths.en
heal.abstractThis thesis goal was to demonstrate that indirect 3d printing of zeolite monoliths provides higher flexibility and freedom as a fabrication method, compared to conventional extrusion procedures. After considering application constrains and needs, sacrificial templates were designed through a Computer Aided Design (CAD) software enabling the precise control of channel’s shape and size. The monoliths, that are the exact negative replicas of the templates, are then evaluated in terms of hydraulic behavior and generated pressure drop through a Computational Fluid Dynamic (CFD) study. After selection of the most efficient design, polymer molds were fabricated by a Digital Light Processing (DLP) printer and were filled with a paste consisting of ZSM 5 zeolite powder and sodium silicate that acts as a binder. A multistep drying process followed by sintering was carried out to burn out the polymer templates and remove the binder. The dimensional accuracy of the final parts was examined using a DinoLite digital optical microscope. Finally the mechanical properties of the produced material were investigated by preparing specimens and performing 3-point bending and microhardness test. The results indicate a potential usage of indirect 3d printing for catalysis procedures.en
heal.academicPublisherSCHOOL OF SCIENCE AND TECHNOLOGY.DIGITAL MANUFACTURING AND MATERIALS CHARACTERIZATIONen
heal.academicPublisherIDihuen_US
heal.accessfreeen_US
heal.advisorNameTZETZIS, DIMITRIOSen
heal.committeeMemberNameKARALEKAS, DIMITRIOSen
heal.committeeMemberNameGOGOUSSIS, ARISTIDESen
heal.dateAvailable2021-05-12
heal.languageenen_US
heal.licensehttp://creativecommons.org/licenses/by-nc/4.0en_US
heal.numberOfPages57en_US
heal.publicationDate2021-05-12
heal.recordProviderSchool of Science and Technology, MSc in Strategic Product Designen_US
heal.tableOfContentsIntroduction..................................................................................................................................... 1 1 Advanced ceramics mechanical properties.................................................................................. 4 1.1 Brittle behavior of ceramics.................................................................................................. 4 1.2 Flexural Strength of ceramics............................................................................................... 5 1.3 Hardness of ceramics............................................................................................................ 7 2 Advanced Ceramics Additive Manufacturing ............................................................................. 9 2.1 Direct Additive Manufacturing for ceramics........................................................................ 9 2.1.1 Stereolithography......................................................................................................... 10 2.1.2 Direct Ink Writing........................................................................................................ 11 2.1.3 Selective Laser Sintering ............................................................................................. 12 2.2 Direct Additive Manufacturing for catalysts ...................................................................... 13 2.3 Indirect Additive Manufacturing for ceramics ................................................................... 14 2.4 Indirect Additive Manufacturing for catalysts.................................................................... 15 3 Tools & Methods....................................................................................................................... 18 3.1 Application requirements.................................................................................................... 18 3.2 Computer Aided Design ..................................................................................................... 19 3.3 Paste composition ............................................................................................................... 23 3.4 Slicing method .................................................................................................................... 25 3.5 Template printing procedure............................................................................................... 28 3.6 Drying & Sintering procedures........................................................................................... 32 3.7 Mechanical properties setup ............................................................................................... 34 4 Results........................................................................................................................................ 40 4.1 CFD simulation................................................................................................................... 40 4.2 Dimensional accuracy......................................................................................................... 46 vi 4.3 Bending results.................................................................................................................... 48 4.4 Hardness results.................................................................................................................. 50 5 Conclusions................................................................................................................................ 52 Table of Figures............................................................................................................................ 54 Table of Tables ............................................................................................................................. 56 Bibliography ................................................................................................................................. 57en
heal.typemasterThesisen_US

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