20.500.12556/DKUM-93016 Vpliv dodatka katalizatorja na produkte termične obdelave bioplastike diplomsko delo univerzitetnega študijskega programa I. stopnje Effect of catalyst addition on products of thermal treatment of bioplastics V diplomskem delu smo preučili vpliv dodatka različnih katalizatorjev na produkte termične obdelave (pirolize) bioplastike. Osredotočili smo se na dodatke, kot so Ca(OH)2, MgO, diatomejska zemlja, filtracijski pesek ter modificirano hidro-oglje, in preučili njihov vpliv na sestavo ter lastnosti trdne faze po pirolizi pri različnih temperaturah (300 °C, 400 °C in 500 °C). V eksperimentalnem delu smo analizirali vzorce z vidika vsebnosti pepela, vlage, hlapnih snovi, kurilne vrednosti, elementne sestave, funkcionalnih skupin (FTIR) ter toplotne stabilnosti (TGA). Ugotovili smo, da se vsebnost hlapnih snovi pri neobdelani bioplastiki (70,88%) po dodatku katalizatorjev in pirolizi pri višjih temperaturah zmanjša tudi pod 25 %. Rezultati FTIR analiz trdnih vzorcev kažejo na razgradnjo alifatskih skupin in tvorbo aromatskih struktur, TGA krivulje pa potrjujejo premike temperature začetka razgradnje (Ti) in temperature pri najvišji hitrosti razgradnje (Tmax) ob dodatku katalizatorjev. Pri termično obdelanih vzorcih z dodatki MgO oz. Ca(OH)2 se Ti zviša, kar kaže na izboljšano toplotno stabilnost, pri termično neobdelanih vzorcih pa se Tmax zniža, kar nakazuje na hitrejšo razgradnjo. Termično obdelani vzorci z dodatkom MgO in Ca(OH)2 so pokazali višje ostanke mase po obdelavi, kar potrjuje večji masni izkoristek trdne faze. Elementna analiza je razkrila znižanje vsebnosti ogljika pri višjih temperaturah, vendar so dodatki katalizatorjev pripomogli k ohranjanju večje vsebnosti ogljika v produktih. Na splošno sta največji vpliv na sestavo produktov imela katalizatorja MgO in Ca(OH)2, medtem ko so modificirano hidro-oglje, filtracijski pesek in diatomejska zemlja pokazali nekoliko manj izrazite učinke. In this thesis, we investigated the influence of various catalyst additives on the products of thermal treatment (pyrolysis) of bioplastic. The focus was placed on additives such as Ca(OH)2, MgO, diatomaceous earth, filter sand, and modified biochar, and their effect on the composition and properties of the solid phase after pyrolysis at different temperatures (300 °C, 400 °C, and 500 °C). In the experimental part, the samples were analyzed in terms of ash content, moisture content, volatile matter, calorific value, elemental composition, functional groups (FTIR), and thermal stability (TGA). It was found that the volatile matter content of untreated bioplastic (70.88%) decreased to below 25% after the addition of catalysts and pyrolysis at higher temperatures. FTIR analysis of the solid samples indicated the degradation of aliphatic groups and the formation of aromatic structures. TGA curves confirmed shifts in the initial degradation temperature (Ti) and the temperature at the maximum degradation rate (Tmax) due to the addition of catalysts. In thermally treated samples with MgO and Ca(OH)2, Ti increased, indicating improved thermal stability, whereas in untreated samples, Tmax decreased, suggesting faster degradation. Thermally treated samples with MgO and Ca(OH)2 also showed higher residual mass after treatment, confirming a greater solid-phase yield. Elemental analysis revealed a reduction in carbon content at higher temperatures; however, the presence of catalyst additives contributed to retaining a higher carbon content in the final products. Overall, MgO and Ca(OH)2 had the most significant impact on the composition of the pyrolysis products, while modified biochar, filter sand, and diatomaceous earth exhibited somewhat less pronounced effects. bioplastika termična obdelava piroliza katalizatorji termogravimetrična analiza bioplastics thermal treatment pyrolysis catalysts thermogravimetric analysis true true false [M. Krajnc] Slovenski jezik Angleški jezik Diplomsko delo/naloga 2025-05-31 14:27:03 2025-07-15 07:12:15 2025-07-26 03:13:36 0000-00-00 00:00:00 2025 0 Maribor 0 Maribor 1 spletni vir (1 datoteka PDF (VIII, 49 f.)) 0000-00-00 NiDoloceno NiDoloceno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 66.092.097.3-97:678.5/.7(043.2) 243823107 UN_Krajnc_Mihaela_2025.pdf UN_Krajnc_Mihaela_2025.pdf 1 79CE39F6B285523B316E512B73CB9E15 8eec70092c7ec9ca8edd7210ab231e36639ec4c8d00e78e6a5630cf5e54ff270 f39277d4-60c4-11f0-a62e-00155d000105 https://dk.um.si/Dokument.php?lang=slv&id=193586 Fakulteta za kemijo in kemijsko tehnologijo 0 0 0