20.500.12556/DKUM-92302 Priprava granuliranih gliničnih adsorbentov na pol-industrijskem nivoju magistrsko delo Preparation of granulated alumina adsorbents on semi-industrial scale 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. 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. aktivirana glinica aluminijev hidrat adsorbent granuliranje adsorpcija activated alumina aluminum hydrate adsorbent granulation adsorption true true false [A. Goričan] Slovenski jezik Angleški jezik Magistrsko delo/naloga 2025-03-27 19:39:37 2025-05-06 14:40:05 2025-05-17 03:07:55 0000-00-00 00:00:00 2025 0 Maribor 0 Maribor 1 spletni vir (1 datoteka PDF (XI, 72 str.)) 0000-00-00 NiDoloceno NiDoloceno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 2028-05-06 661.183.3.099.2(043.2) 236086531 MAG_Gorican_Ana_2025.pdf MAG_Gorican_Ana_2025.pdf 1 826EED120DF00DECD80225ECFD9E7277 e27fb99704982247aef49a58f232b2eaa3c16ec10d2bde540edd8bfe391d18a9 6988cc82-2219-11f0-a95d-00155d000105 https://dk.um.si/Dokument.php?lang=slv&id=190556 Fakulteta za kemijo in kemijsko tehnologijo 0 0 0