Utjecaj ultrazvučnog djelovanja na postizanje stanja potpune suspenzije kristala boraksa u kristalizatoru sa SBT miješalom

Mateljak, Karmen

prikaz prve stranice dokumenta Utjecaj ultrazvučnog djelovanja na postizanje stanja potpune suspenzije kristala boraksa u kristalizatoru sa SBT miješalom

undergraduate thesis

Utjecaj ultrazvučnog djelovanja na postizanje stanja potpune suspenzije kristala boraksa u kristalizatoru sa SBT miješalom

završni rad

Split: University of Split, Faculty of Chemistry and Technology, 2019. urn:nbn:hr:167:797005

Mateljak, Karmen

University of Split
Faculty of Chemistry and Technology
Division of Engineering and Chemistry

Cite this document

APA 6th Edition

Mateljak, K. (2019). Utjecaj ultrazvučnog djelovanja na postizanje stanja potpune suspenzije kristala boraksa u kristalizatoru sa SBT miješalom : završni rad (Undergraduate thesis). Split: University of Split, Faculty of Chemistry and Technology. Retrieved from https://urn.nsk.hr/urn:nbn:hr:167:797005

MLA 8th Edition

Mateljak, Karmen. "Utjecaj ultrazvučnog djelovanja na postizanje stanja potpune suspenzije kristala boraksa u kristalizatoru sa SBT miješalom : završni rad." Undergraduate thesis, University of Split, Faculty of Chemistry and Technology, 2019. https://urn.nsk.hr/urn:nbn:hr:167:797005

Chicago 17th Edition

Harvard

Mateljak, K. (2019). 'Utjecaj ultrazvučnog djelovanja na postizanje stanja potpune suspenzije kristala boraksa u kristalizatoru sa SBT miješalom : završni rad', Undergraduate thesis, University of Split, Faculty of Chemistry and Technology, accessed 22 December 2024, https://urn.nsk.hr/urn:nbn:hr:167:797005

Vancouver

Mateljak K. Utjecaj ultrazvučnog djelovanja na postizanje stanja potpune suspenzije kristala boraksa u kristalizatoru sa SBT miješalom : završni rad [Undergraduate thesis]. Split: University of Split, Faculty of Chemistry and Technology; 2019 [cited 2024 December 22] Available at: https://urn.nsk.hr/urn:nbn:hr:167:797005

IEEE

K. Mateljak, "Utjecaj ultrazvučnog djelovanja na postizanje stanja potpune suspenzije kristala boraksa u kristalizatoru sa SBT miješalom : završni rad", Undergraduate thesis, University of Split, Faculty of Chemistry and Technology, Split, 2019. Available at: https://urn.nsk.hr/urn:nbn:hr:167:797005

Cite this item: https://urn.nsk.hr/urn:nbn:hr:167:797005

Please login to the repository to save this object to your list.

Metadata

Title	Utjecaj ultrazvučnog djelovanja na postizanje stanja potpune suspenzije kristala boraksa u kristalizatoru sa SBT miješalom : završni rad
Title (english)	Influence of ultrasonic irradiation on complete suspension state of borax in crystallizer equipped by SBT impeller : bachelor thesis
Author	Karmen Mateljak
Mentor	Nenad Kuzmanić (mentor) MBZ: 120556
Committee member	Maja Kliškić (predsjednik povjerenstva)
Committee member	Marija Ćosić (član povjerenstva)
Committee member	Nenad Kuzmanić (član povjerenstva)
Granter	University of Split Faculty of Chemistry and Technology (Division of Engineering and Chemistry) Split
Defense date and country	2019-07-22, Croatia
Scientific / art field, discipline and subdiscipline	TECHNICAL SCIENCES Chemical Engineering
Abstract	Cilj rada bio je ispitati utjecaj ultrazvuĉnog djelovanja na postizanje stanja potpune suspenzije kristala dinatrijevog tetraborat dekahidrata (boraks) u kristalizatoru sa SBT miješalom. OdreĊivanje minimalne brzine vrtnje miješala za postizanje stanje potpune suspenzije, 𝑁 𝐽𝑆 , uz i bez primjene ultrazvuka provedeno je na laboratorijskom šaržnom kristalizatoru u kojem je volumen suspenzije iznosio 2.6 dm 3 , uz primjenu Zwieteringova kriterija "1s". Ispitivanja su provedena s tri razliĉita promjera radijalnog SBT miješala i pri ĉetiri razliĉite amplitude jakosti ultrazvuka 𝐴= 20 − 40% . Eksperimentalni rezultati ukazuju da primjena ultrazvuka smanjuje vrijednost 𝑁 𝐽𝑆 u ispitivanom reaktorskom sustavu. MeĊutim, sugerira se korištenje manjih amplituda jakosti ultrazvuka (𝐴= 20%) s obzirom na to da daljnjim povećanjem intenziteta ultrazvuka vrijednosti 𝑁 𝐽𝑆 se dodatno ne smanjuju, dok se ukupni utrošak snage miješanja znaĉajno povećava. Za ispitivanu geometriju šaržnog kristalizatora te ispitivanu koncentraciju i odreĊenu veliĉinu kristala boraksa izvedena je korelacijska jednadžba koja povezuje vrijednosti 𝑁 𝐽𝑆 sa amplitudom jakosti ultrazvuka i simpleksa (D/(T)
Abstract (english)	The aim of this research was to examine the influence of the ultrasound on the state of complete suspension of the sodium tetraborate decahydrate (borax) crystals in the crystallizer with SBT impeller. Determination of minimal impeller speed required to achieve a state of complete suspension, N JS, with or without the ultrasound, was conducted in the laboratory scale batch crystallizer with a suspension volume of 2.6 dm 3 , using Zwietering's criterion "1s". The tests were carried out at three different diameters of the radial SBT impeller and at four different amplitudes of the ultrasound (𝐴= 20 − 40%) . Experimental results showed that ultrasonic irradiation reduces the value of N JS in the examined reactor system. Nevertheless, it is suggested to use lower amplitudes of the ultrasound 𝐴= (20%) since with the increasement of the ultrasound intensity N JS is not additionally reduced, while total power consumption of mixing is significantly increased. For the examined geometry of the batch crystallizer, the concentration and size of the borax crystals, an equation which correlate the N JS value with the ultrasound amplitude and simplex (D/T) was derived.
Keywords
Keywords (english)
Language	croatian
URN:NBN	urn:nbn:hr:167:797005
Study programme	Title: Chemical Technology; specializations in: Chemical Engineering, Environmental Protection Course: Chemical Engineering Study programme type: university Study level: undergraduate Academic / professional title: sveučilišni/a prvostupnik/ prvostupnica (baccalaureus/baccalaurea) inženjer/inženjerka kemijskog inženjerstva (sveučilišni/a prvostupnik/ prvostupnica (baccalaureus/baccalaurea) inženjer/inženjerka kemijskog inženjerstva)
Type of resource	Text
File origin	Born digital
Access conditions	Open access Embargo expiration date: 2021-07-23
Terms of use
Repository	Repository of the Faculty of chemistry and technology
Created on	2019-12-06 09:10:49