Priprava granuliranih gliničnih adsorbentov na pol-industrijskem nivoju : magistrsko delo

Goričan, Ana

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Title:	Priprava granuliranih gliničnih adsorbentov na pol-industrijskem nivoju : magistrsko delo
Authors:	ID Goričan, Ana (Author) ID Ban, Irena (Mentor) More about this mentor... ID Križan, Gregor (Comentor), et al.
Files:	MAG_Gorican_Ana_2025.pdf (6,54 MB, This file will be accessible after 06.05.2028) MD5: 826EED120DF00DECD80225ECFD9E7277
Language:	Slovenian
Work type:	Master's thesis/paper
Typology:	2.09 - Master's Thesis
Organization:	FKKT - Faculty of Chemistry and Chemical Engineering
Abstract:	Uporaba različnih adsorpcijskih sredstev za sušenje komprimiranega zraka je ključnega pomena v številnih industrijskih panogah, saj zagotavlja stabilne pogoje za delovanje opreme in preprečuje korozijo. V magistrskem delu smo proučevali razvoj granulirane aktivirane glinice, namenjene uporabi v sušilnikih komprimiranega zraka. Cilj je bil proizvesti granulat iz aluminijevega hidrata, aktivirane glinice in psevdoboehmita v različnih razmerjih, z namenom doseganja čim višje trdote granul, specifične površine 300 m²/g, določene po BET metodi, in kapacitete vodne adsorpcije (SWA) 15 %. V raziskavi smo uporabili dve različni vrsti glinice in tri tipe hidratov, da bi proučili njihov vpliv na lastnosti granulata. Poleg vpliva surovin smo proučevali še vpliv kalcinacije pri različnih temperaturah. Rezultati so pokazali, da delež aluminijevega hidrata pomembno vpliva na trdoto granul. Nižji deleži hidrata so omogočili izdelavo trdnejših granul zaradi manjše poroznosti, medtem ko je dodatek psevdoboehmita izboljšal trdoto, specifično površino in adsorpcijske lastnosti. Najboljši rezultati so bili doseženi pri formulaciji s 35 % hidrata, kjer so granule dosegle najvišjo trdoto 51 N in SWA 13,3 %, kar se približuje zastavljenim ciljem, ter z 20 % hidrata, kjer je bila dosežena najvišja specifična površina, ki je znašala 283,05 m2/g. Optimizacija je pokazala, da kalcinacija pri temperaturah nad 400 °C ni smiselna, saj ne prinaša bistvenih izboljšav in povečuje energetske stroške. Opravljene so bile tudi XRD analize za boljši vpogled v strukturno sestavo končnih produktov. Ugotovljena sta bila prevlada amorfnih faz pri nižjih temperaturah in prehod v χ ter κ glinico pri višjih temperaturah. Čeprav cilji niso bili povsem doseženi, raziskava predstavlja pomemben vpogled v vpliv surovin in procesnih parametrov na lastnosti granulata. Naše ugotovitve ponujajo trdno osnovo za nadaljnje raziskave in izboljšave materialov za doseganje konkurenčnosti na trgu.
Keywords:	aktivirana glinica, aluminijev hidrat, adsorbent, granuliranje, adsorpcija
Place of publishing:	Maribor
Place of performance:	Maribor
Publisher:	[A. Goričan]
Year of publishing:	2025
Number of pages:	1 spletni vir (1 datoteka PDF (XI, 72 str.))
PID:	20.500.12556/DKUM-92302
UDC:	661.183.3.099.2(043.2)
COBISS.SI-ID:	236086531
Publication date in DKUM:	06.05.2025
Views:	0
Downloads:	0
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Categories:	KTFMB - FKKT
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Licences

License:	CC BY-NC-ND 4.0, Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International

Link:	http://creativecommons.org/licenses/by-nc-nd/4.0/
Description:	The most restrictive Creative Commons license. This only allows people to download and share the work for no commercial gain and for no other purposes.
Licensing start date:	27.03.2025

Secondary language

Language:	English
Title:	Preparation of granulated alumina adsorbents on semi-industrial scale
Abstract:	The use of various adsorption agents for drying compressed air is crucial in many industries, as it ensures stable operating conditions for equipment and prevents corrosion. In this master's thesis, the development of grnulated activated alumina for use in compressed air dryers was investigated. The aim was to produce a granulate made from aluminium hydrate, activated alumina and pseudoboehmite in different proportions, in order to achieve the highest possible mechanical strength, a BET specific surface area of 300 m²/g, and a water adsorption capacity (SWA) of 15%. Two different types of alumina and three types of hydrate were used in the study to examine their influence, alongside the calcination temperature, on the properties of the granulate. The results showed that the proportion of aluminium hydrate significantly affects the mechanical strength of the granules. Lower proportions of hydrate allowed the production of harder granules due to lower porosity, while the addition of pseudoboehmite improved the mechanical strength, specific surface area and adsorption properties. The best results were obtained with the 35% hydrate formulation, where the granules achieved the highest mechanical strength of 51 N and SWA of 13.3%, which is close to the set objectives, and with the 20% hydrate formulation, where the highest specific surface area of 283.05 m2/g was achieved. The optimisation revealed that calcination at temperatures above 400°C is not viable, as it does not result in significant improvements and increases energy costs. XRD analyses were also conducted to gain a better understanding of the structural composition of the final products, showing a predominance of amorphous phases at lower temperatures and a transition to χ- and κ-alumina at higher temperatures. Although the objectives were not fully achieved, the study provides valuable insights into the influence of raw materials and process parameters on the properties of the granulate. Our findings provide a solid foundation for further research and material improvements to achieve competitiveness in the market.
Keywords:	activated alumina, aluminum hydrate, adsorbent, granulation, adsorption

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