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master's thesis
UTJECAJ MASE CJEPIVA VELIČINE L=82,5 MIKROMETRA NA SVOJSTVA KRISTALA KALIJEVOG SULFATA U PROCESU CIJEPLJENE KRISTALIZACIJE
diplomski rad
2024. urn:nbn:hr:167:748076
Horvat, Ivana
University of Split
Faculty of Chemistry and Technology
Division of Engineering and Chemistry

Cite this document

Horvat, I. (2024). UTJECAJ MASE CJEPIVA VELIČINE L=82,5 MIKROMETRA NA SVOJSTVA KRISTALA KALIJEVOG SULFATA U PROCESU CIJEPLJENE KRISTALIZACIJE : diplomski rad (Master's thesis). Split: University of Split, Faculty of Chemistry and Technology. Retrieved from https://urn.nsk.hr/urn:nbn:hr:167:748076

Horvat, Ivana. "UTJECAJ MASE CJEPIVA VELIČINE L=82,5 MIKROMETRA NA SVOJSTVA KRISTALA KALIJEVOG SULFATA U PROCESU CIJEPLJENE KRISTALIZACIJE : diplomski rad." Master's thesis, University of Split, Faculty of Chemistry and Technology, 2024. https://urn.nsk.hr/urn:nbn:hr:167:748076

Horvat, Ivana. "UTJECAJ MASE CJEPIVA VELIČINE L=82,5 MIKROMETRA NA SVOJSTVA KRISTALA KALIJEVOG SULFATA U PROCESU CIJEPLJENE KRISTALIZACIJE : diplomski rad." Master's thesis, University of Split, Faculty of Chemistry and Technology, 2024. https://urn.nsk.hr/urn:nbn:hr:167:748076

Horvat, I. (2024). 'UTJECAJ MASE CJEPIVA VELIČINE L=82,5 MIKROMETRA NA SVOJSTVA KRISTALA KALIJEVOG SULFATA U PROCESU CIJEPLJENE KRISTALIZACIJE : diplomski rad', Master's thesis, University of Split, Faculty of Chemistry and Technology, accessed 23 January 2025, https://urn.nsk.hr/urn:nbn:hr:167:748076

Horvat I. UTJECAJ MASE CJEPIVA VELIČINE L=82,5 MIKROMETRA NA SVOJSTVA KRISTALA KALIJEVOG SULFATA U PROCESU CIJEPLJENE KRISTALIZACIJE : diplomski rad [Master's thesis]. Split: University of Split, Faculty of Chemistry and Technology; 2024 [cited 2025 January 23] Available at: https://urn.nsk.hr/urn:nbn:hr:167:748076

I. Horvat, "UTJECAJ MASE CJEPIVA VELIČINE L=82,5 MIKROMETRA NA SVOJSTVA KRISTALA KALIJEVOG SULFATA U PROCESU CIJEPLJENE KRISTALIZACIJE : diplomski rad", Master's thesis, University of Split, Faculty of Chemistry and Technology, Split, 2024. Available at: https://urn.nsk.hr/urn:nbn:hr:167:748076

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Metadata
TitleUTJECAJ MASE CJEPIVA VELIČINE L=82,5 MIKROMETRA NA SVOJSTVA KRISTALA KALIJEVOG SULFATA U PROCESU CIJEPLJENE KRISTALIZACIJE : diplomski rad
Title (english)Influence of the seed mass with a size of L=82,5 um on the properties of potassium sulphate crystals in the seeded crystallization : diploma thesis
AuthorIvana Horvat
MentorMarija Ćosić (mentor)
Committee memberIvana Smoljko (predsjednik povjerenstva)
Committee memberAntonija Čelan (član povjerenstva)
Committee memberMarija Ćosić (član povjerenstva)
GranterUniversity of Split
Faculty of Chemistry and Technology
(Division of Engineering and Chemistry)
Split
Defense date and country2024-10-30, Croatia
Scientific / art field,
discipline and subdiscipline		TECHNICAL SCIENCES
Chemical Engineering
Abstract
Cilj rada je bio sagledati utjecaj mase cjepiva, definirane veličine na karakteristike kristala dobivenih procesom cijepljene kristalizacije. Ispitivanje se provodilo u kristalizatoru s razbijalima virova i radijalnim miješalom čija je brzina vrtnje iznosila N =300 o. min -1 . Matična otopina, zasićena pri 30 °C, hladila se linearno do 15 °C. U prvom dijelu rada provedena je necijepljena šaržna kristalizacija s ciljem određivanja širine metastabilne zone te granulometrijskih svojstava produkta kako bi se definirali uvjeti provedbe cijepljene kristalizacije. Kao cjepivo su korišteni kristali kalijevog sulfata prosječne veličine 82,5 μm pri četiri različite mase koje su iznosile od 2 do 5 % teorijskog prinosa kristala. Tijekom provedbe kristalizacije periodično je uzorkovana suspenzija kristala koja je granulometrijski analizirana metodom laserske difrakcije. S ciljem detaljnog sagledavanja utjecaja cjepiva na rast kristala sagledane su funkcijom gustoće raspodjele tijekom procesa hlađenja te promjene srednje veličine rastućih kristala kao i promjene koncentracije matične otopine. Po završetku procesa kristalizacije, produkt je granulometrijski analiziran te s obzirom na najveći volumni promjer i najmanju standardnu devijaciju kristala dobivenih pri korištenju cjepiva najveće mase, masa cjepiva m 4 smatra se najpovoljnijom.
Abstract (english)
In this study, seeded crystallization of potassium sulphate was carried out using a controlled cooling method. The aim of the study was to investiage the influence of the seed mass, defined by its size, on the properties of the crystals obtained in this process. The experiment was conducted in a crystallizer equipped with baffles and a radial impeller, rotating at a speed of N =300 rpm. The mother liquor, saturated at 30 °C, was cooled linearly to 15 °C. In the first part of the study, an unseeded batch crystallization was carried out to determine the width of the metastable zone and the granulometric properties of the product in order to define the conditions for seeded crystallization. Potassium sulphate crystals with an average size of 82,5 μm were used as seed material, with four different seed masses ranging from 2 to 5 % of the theoretical crystallization yield. During crystallization, crystal suspension samples were periodically withdrawn and subjected to granulometric analysis using laser diffraction. In order to gain a detailed insight into the influence of the seed on crystal growth, the changes in the particle size distribution function during the cooling process as well as the changes in the mean crystal size and the concentration of the mother liquor were monitored. After completion of the crystallization process, a granulometric analysis of the final product was performed. Based on the largest mean volume diameter and the lowest standard deviation of the crystals obtained with the highest seed mass, the seed mass m 4 was considered the most favorable.
Keywords
Keywords (english)
Languagecroatian
URN:NBNurn:nbn:hr:167:748076
Study programmeTitle: Chemical Technology; specializations in: Materials, Environmental Protection, Mediteranean Cultures, Materials and Environmental protection
Course: Materials
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
Terms of useLicence In copyright icon
Created on2025-01-23 09:11:20