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Title:UPORABA POPULACIJSKEGA BILANČNEGA MODELA ZA NAPOVEDOVANJE PORAZDELITEV VELIKOSTI KAPLJIC KONCENTRIRANIH EMULZIJ
Authors:ID Aničić, Nemanja (Author)
ID Kravanja, Zdravko (Mentor) More about this mentor... New window
ID Krajnc, Peter (Comentor)
Files:.pdf UNI_Anicic_Nemanja_2013.pdf (1,95 MB)
MD5: D4BE296BC701D7ABA3F52D7EAB4C550B
 
Language:Slovenian
Work type:Undergraduate thesis
Typology:2.11 - Undergraduate Thesis
Organization:FKKT - Faculty of Chemistry and Chemical Engineering
Abstract:Namen diplomskega dela je eksperimentalna preiskava vpliva mešalnega časa, mešalne hitrosti in koncentracije površinsko aktivne snovi na porazdelitev velikosti kapljic ter uporabnost modela PBE (populacijski bilančni model), ki smo ga preizkusili za omenjene spremembe v procesu priprave koncentriranih emulzij. Preiskovali smo koncentrirane emulzije, kjer je vodna faza vodna raztopina kalcijevega klorida in organska faza mešanica stirena in divinilbenzena. Sorbitol oleat smo uporabljali kot stabilizator koncentriranih emulzij. Eksperimentalne meritve porazdelitve velikosti kapljic smo izvedli s pomočjo optičnega mikroskopa. Model PBE smo reševali z uporabo programske opreme GAMS/CONOPT. Uporaba modela PBE zahteva eksperimentalno določevanje modelnih parametrov s pomočjo meritev za osnovni sistem. Zbrane eksperimentalne podatke za druge sisteme smo primerjali z rešitvami modela PBE. Postopek reševanja je bil poenostavljen in poenostavitve smo kvantitativno ovrednotili. Ugotovili smo, da se učinkovitost modela PBE veča, če se razlika med obravnavanim sistemom in osnovnim sistemom manjša. Pokazali smo, da uporaba modela PBE omogoča zaznavanje napak v eksperimentalni proceduri. Rezultati eksperimentalnih meritev kažejo, da se tekom procesa priprave koncentriranih emulzij ne vzpostavi stacionarno stanje niti po 20 urah mešanja.
Keywords:Koncentrirane emulzije, napovedovanje porazdelitve velikosti kapljic, Populacijski bilančni model, snemanje krivulj, matematično programiranje
Place of publishing:Maribor
Publisher:[N. Aničić]
Year of publishing:2013
PID:20.500.12556/DKUM-41449 New window
UDC:66.011:519.852(043.2)
COBISS.SI-ID:17442582 New window
NUK URN:URN:SI:UM:DK:GVRIMHEQ
Publication date in DKUM:03.09.2013
Views:1831
Downloads:210
Metadata:XML DC-XML DC-RDF
Categories:KTFMB - FKKT
:
ANIČIĆ, Nemanja, 2013, UPORABA POPULACIJSKEGA BILANČNEGA MODELA ZA NAPOVEDOVANJE  PORAZDELITEV VELIKOSTI KAPLJIC KONCENTRIRANIH EMULZIJ [online]. Bachelor’s thesis. Maribor : N. Aničić. [Accessed 13 April 2025]. Retrieved from: https://dk.um.si/IzpisGradiva.php?lang=eng&id=41449
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Secondary language

Language:English
Title:APPLICATION OF THE POPULATION BALANCE MODEL FOR THE PREDICTION OF CONCENTRATED EMULSION DROPLET SIZE DISTRIBUTIONS
Abstract:Aim of the investigation was the experimental determination of influences regarding the stirring time, the stirring rate of rotation, and the concentration of surface active material on the drop size distributions of concentrated emulsions, as well as testing the applicability of the PBE (population balance equation) model for predicting various drop size distributions. Concentrated emulsions were prepared from an aqueous phase, which was a water solution of calcium chloride, and from an organic phase containing styrene and divinylbenzene. Sorbitol oleate was used as a system stabilization agent. Experimental determination of drop size distributions was performed using an optical microscope. The PBE model was solved using GAMS/CONOPT. Determination of model parameters was performed using the experimental results for a base case system. Experimentally determined drop size distributions for other systems were compared with the predicted ones, those representing the solutions of the PBE model. The solution procedure was simplified and the simplifications quantitatively evaluated. It was shown that the applicability of the PBE model was higher if the difference between the studied and base case system was lower. Furthermore, the use of the PBE model allows determining any gross errors of the experimental results. Finally, it could be stated that steady state is not achieved during the preparation of concentrated emulsions, even after 20 hours of mixing.
Keywords:Concentrated emulsion, Prediction of drop size distributions, Population balance equation model, Curve fitting, Mathematical programming.


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