prikaz prve stranice dokumenta Granuliranje agrikulturne tvari prevrtanjem na kosom disku: modeliranje procesa pristupom populacijske bilance
  Download
PDF 2.82 MB
undergraduate thesis
Granuliranje agrikulturne tvari prevrtanjem na kosom disku: modeliranje procesa pristupom populacijske bilance
Zagreb: University of Zagreb, Faculty of Chemical Engineering and Technology, 2017. urn:nbn:hr:149:669361
Domitrović, Valentina
University of Zagreb
Faculty of Chemical Engineering and Technology

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

Cite this document

Domitrović, V. (2017). Granuliranje agrikulturne tvari prevrtanjem na kosom disku: modeliranje procesa pristupom populacijske bilance (Undergraduate thesis). Zagreb: University of Zagreb, Faculty of Chemical Engineering and Technology. Retrieved from https://urn.nsk.hr/urn:nbn:hr:149:669361

Domitrović, Valentina. "Granuliranje agrikulturne tvari prevrtanjem na kosom disku: modeliranje procesa pristupom populacijske bilance." Undergraduate thesis, University of Zagreb, Faculty of Chemical Engineering and Technology, 2017. https://urn.nsk.hr/urn:nbn:hr:149:669361

Domitrović, Valentina. "Granuliranje agrikulturne tvari prevrtanjem na kosom disku: modeliranje procesa pristupom populacijske bilance." Undergraduate thesis, University of Zagreb, Faculty of Chemical Engineering and Technology, 2017. https://urn.nsk.hr/urn:nbn:hr:149:669361

Domitrović, V. (2017). 'Granuliranje agrikulturne tvari prevrtanjem na kosom disku: modeliranje procesa pristupom populacijske bilance', Undergraduate thesis, University of Zagreb, Faculty of Chemical Engineering and Technology, accessed 27 December 2024, https://urn.nsk.hr/urn:nbn:hr:149:669361

Domitrović V. Granuliranje agrikulturne tvari prevrtanjem na kosom disku: modeliranje procesa pristupom populacijske bilance [Undergraduate thesis]. Zagreb: University of Zagreb, Faculty of Chemical Engineering and Technology; 2017 [cited 2024 December 27] Available at: https://urn.nsk.hr/urn:nbn:hr:149:669361

V. Domitrović, "Granuliranje agrikulturne tvari prevrtanjem na kosom disku: modeliranje procesa pristupom populacijske bilance", Undergraduate thesis, University of Zagreb, Faculty of Chemical Engineering and Technology, Zagreb, 2017. Available at: https://urn.nsk.hr/urn:nbn:hr:149:669361

Metadata
TitleGranuliranje agrikulturne tvari prevrtanjem na kosom disku: modeliranje procesa pristupom populacijske bilance
Title (english)Tumble granulation of agricultural substance using inclined disc unit: modelling of the process using population balance approach
AuthorValentina Domitrović
MentorKrunoslav Žižek (mentor)
Committee memberKrunoslav Žižek (predsjednik povjerenstva)
Committee memberGordana Matijašić (član povjerenstva)
Committee memberVanja Kosar (član povjerenstva)
GranterUniversity of Zagreb
Faculty of Chemical Engineering and Technology
Zagreb
Defense date and country2017-09-15, Croatia
Scientific / art field,
discipline and subdiscipline		TECHNICAL SCIENCES
Chemical Engineering
Mechanical, Thermal and Separation Processes
Abstract
U ovome je radu sagledano mokro granuliranje prevrtanjem kao moguća procesna tehnologija za pripravu pogodne formulacije agrikulturne tvari Agrocal® u svrhu dobivanja sustava dobrih primjenskih svojstava. Testovi šaržnog granuliranja provedeni su prevrtanjem praškaste tvari u procesnoj geometriji kosog diska u laboratorijskom mjerilu. U fizičkoj pretvorbi tvari dodatno je korišten zrak i vezivo, vodena otopina kukuruznog škroba čiji je kolektiv kapljica dodavan raspršivanjem. Studij fenomena granuliranja u laboratorijskom mjerilu usmjeren je k pronalaženju procesnih uvjeta koji će sinergističkim djelovanjem upravljati mikro- i mezorazinskim događajima na povoljan i ciljani način te time rezultirati kolektivom postojanih okrupnjenih jedinki, Agrocal® granula. Detektirane promjene svojstva kolektiva jedinki, raspodjele veličina čestica, s vremenom granuliranja ukazuju na doseg fizičke pretvorbe agrikulturne tvari u procesu granuliranja. Proces sadržane pretvorbe tvari modeliran je mehanističkim pristupom, primjenom populacijske bilance. Pristup modeliranja populacijskom bilancom u ovom radu podrazumijeva ispitivanje mogućnosti primjene 1-D populacijske bilance u diskretiziranom obliku te Size-Independent Kernel (SIK) modela koalescencije u simuliranju stvarne promjene raspodjele veličina čestica Agrocal® s vremenom. Primijenjeni pristup ukazuje na zastupljenost sadržanih mehanizama u procesu granuliranja. Metodom optimizacije, očitovanom u minimiziranju ukupne sume kvadrata odstupanja, procijenjen je karakterističan procesni parametar, konstanta brzine koalescencije. Time, kvantificirana je kinetika fizičke pretvorbe Agrocal® u stohastičkom okruženju kosog diska.
Abstract (english)
In this thesis, wet tumble granulation is scrutinized as a potential process technology for formulation of agricultural substance, Agrocal® in order to produce system with good end-use properties. Batch granulation tests were performed by tumbling of powder substance in process geometry of inclined disc in a lab-scale. Air and binder, water solution of corn starch whose droplet population is added by spraying, are additionally used in physical conversion of a substance. Study of the granulation phenomenon in a lab-scale is focused towards detection of process conditions that will synergically drive micro- and meso-scale events in a favourable and aimed way and therewith result in a collective of stable enlarged entities, Agrocal® granules. Detected changes of the property of a group of entities, particle size distribution (PSD) with respect to granulation time point to the extent of physical conversion of agricultural substance within granulation process. Process of underlying conversion of a substance is modelled with mechanistic approach using population balance. Such modelling approach in this thesis implies testing the applicability of a 1-D discretized population balance with Size-Independent Kernel (SIK) coalescence model for simulation of real temporal changes of Agrocal® PSD. Used approach indicates the contributions of underlying mechanisms in the granulation process. Optimization method that connotes minimizing the overall sum of squared errors is used for estimation of characteristic process parameter, coalescence rate constant. Thus, kinetic of physical conversion of Agrocal® in a stochastic environment of an inclined disc is quantified.
Keywords
Keywords (english)
Languagecroatian
URN:NBNurn:nbn:hr:149:669361
Study programmeTitle: Applied Chemistry - Undergraduate study; specializations in: Environmental chemistry and green technologies, Advanced materials and technologies, Applied organic chemistry
Course: Environmental chemistry and green technologies
Study programme type: university
Study level: undergraduate
Academic / professional title: sveučilišni/a prvostupnik/prvostupnica (baccalaureus/baccalaurea) primijenjene kemije (sveučilišni/a prvostupnik/prvostupnica (baccalaureus/baccalaurea) primijenjene kemije)
Type of resourceText
File originBorn digital
Access conditionsOpen access
Terms of useLicence In copyright icon
Created on2021-03-12 09:15:23