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master's thesis
Izrada i baždarenje uređaja za mjerenje raspodjele veličina čestica
Zagreb: University of Zagreb, Faculty of Chemical Engineering and Technology, 2022. urn:nbn:hr:149:342442
Kocijan, Sara
University of Zagreb
Faculty of Chemical Engineering and Technology

Institutional repository: Repository of Faculty of Chemical Engineering and Technology University of Zagreb

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Kocijan, S. (2022). Izrada i baždarenje uređaja za mjerenje raspodjele veličina čestica (Master's thesis). Zagreb: University of Zagreb, Faculty of Chemical Engineering and Technology. Retrieved from https://urn.nsk.hr/urn:nbn:hr:149:342442

Kocijan, Sara. "Izrada i baždarenje uređaja za mjerenje raspodjele veličina čestica." Master's thesis, University of Zagreb, Faculty of Chemical Engineering and Technology, 2022. https://urn.nsk.hr/urn:nbn:hr:149:342442

Kocijan, Sara. "Izrada i baždarenje uređaja za mjerenje raspodjele veličina čestica." Master's thesis, University of Zagreb, Faculty of Chemical Engineering and Technology, 2022. https://urn.nsk.hr/urn:nbn:hr:149:342442

Kocijan, S. (2022). 'Izrada i baždarenje uređaja za mjerenje raspodjele veličina čestica', Master's thesis, University of Zagreb, Faculty of Chemical Engineering and Technology, accessed 20 December 2024, https://urn.nsk.hr/urn:nbn:hr:149:342442

Kocijan S. Izrada i baždarenje uređaja za mjerenje raspodjele veličina čestica [Master's thesis]. Zagreb: University of Zagreb, Faculty of Chemical Engineering and Technology; 2022 [cited 2024 December 20] Available at: https://urn.nsk.hr/urn:nbn:hr:149:342442

S. Kocijan, "Izrada i baždarenje uređaja za mjerenje raspodjele veličina čestica", Master's thesis, University of Zagreb, Faculty of Chemical Engineering and Technology, Zagreb, 2022. Available at: https://urn.nsk.hr/urn:nbn:hr:149:342442

Metadata
TitleIzrada i baždarenje uređaja za mjerenje raspodjele veličina čestica
Title (english)Manufacture and calibration of device for measuring particle size distribution
AuthorSara Kocijan
MentorJuraj Šipušić (mentor)
Committee memberJuraj Šipušić (predsjednik povjerenstva)
Committee memberKrunoslav Žižek (član povjerenstva)
Committee memberVanja Kosar (član povjerenstva)
GranterUniversity of Zagreb
Faculty of Chemical Engineering and Technology
Zagreb
Defense date and country2022-09-29, Croatia
Scientific / art field,
discipline and subdiscipline		TECHNICAL SCIENCES
Chemical Engineering
Abstract
Napravljena je aparatura za određivanje raspodjele veličine čestica na temelju metode fotosedimentacije. Intenzitet svjetlosti propuštene kroz mjernu ćeliju s vremenom raste što je posljedica smanjenja koncentracije suspendirane tvari zbog sedimentacije čestica. Dodavanjem inkremnetalnih odvaga točno određene mase izrađen je baždarni dijagram za uzorak aluminijeva hidroksida. Tijekom eksperimenta ispitivane su četiri vrste uzoraka komercijalnih imena: BEDEK-185, SW-1, P-1-184 i Cr2O3, te aluminijev hidroksid. Uzorci su karakterizirani metodama optičke mikrosokopije, SEM-EDS, DRS i rendgenske difrakcijske analize na prahu. Uzorci su pripravljeni kao vodene suspenzije određene masene koncentracije, a fotodetektor je preko uređaja za akviziciju podataka povezan s računalom i mjeri povećanje intenziteta svjetlosti tijekom sedimentacije. Stokesov zakon primjenjiv je samo za niske vrijednosti Reynoldsove značajke (Re < 0.25) i određuje brzinu nesmetane sedimentacije čestica. Za obradu rezultata uveden je empirijski model čime se kao rezultat dobiva kumulativna krivulja raspodjele veličine čestica većih od ekvivalentnog Stokesovog promjera.
Abstract (english)
Laboratory apparatus for calibration and determination of the particle size distribution was made based on the measurement of the mass of sedimented particles in the suspension column the photosedimentation method. The intensity increases with time, which is a consequence of the reduction of the suspended concentration, since the sedimentation of particles occurs. By adding incremental scales of precisely determined mass, a calibration diagram was created for a sample of aluminum hydrate. During the experiment, four types of samples with commercial names: BEDEK-185, SW-1, P-1-184 and Cr2O3, and aluminum hydrate were tested. The samples were subjected to characterization methods based on which the composition of the samples was identified: Optical microscope, SEM, DRS, EDS and X-ray analysis. The samples are prepared as aqueous suspensions of a certain mass concentration, and the photosensor is connected to a computer and measures the increase in intensity as a function of time. Stokes' law is applicable only for low values of the Reynolds characteristic (Re<0.25) and determines the speed of undisturbed particle sedimentation. The assumed empirical model is used to process the results, a cumulative curve - determines the size of the particles larger than the equivalent Stokes diameter.
Keywords
Keywords (english)
Languagecroatian
URN:NBNurn:nbn:hr:149:342442
Study programmeTitle: Materials Science and Engineering - Graduate study
Study programme type: university
Study level: graduate
Academic / professional title: magistar/magistra inženjer/inženjerka kemijskog inženjerstva (magistar/magistra inženjer/inženjerka kemijskog inženjerstva)
Type of resourceText
File originBorn digital
Access conditionsOpen access
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Created on2023-03-29 09:22:10