20.500.12556/DKUM-89384-ad04d91b-195a-1504-bd5e-f8dd58ae68e2 Adsorpcijske lastnosti toreficirane biomase diplomsko delo univerzitetnega študijskega programa I. stopnje Adsorption properties of torrefied biomass Neposredna uporaba kmetijskih in lesnih ostankov kot goriva je običajno otežena zaradi njihovih slabih energetskih lastnosti. Torefikacija je metoda, ki nam pomaga pri nadgradnji biomase v izdelek z izboljšanimi energetskimi lastnostmi. Namen diplomskega dela je preučiti procese torefikacije biomase, adsorpcije kovin na toreficirano biomaso in adsorpcije vlage na surove ter toreficirane vzorce. Dokazati moramo, da se lastnosti toreficirane biomase razlikujejo od originalne biomase. Najprej izvedemo torefikacijo našega vzorca pri različnih temperaturah, nato analiziramo izgubo mase in izkoristek mase. Na vzorec, toreficiran pri najvišji temperaturi, adsorbiramo kovine. Vse pridobljene vzorce analiziramo s termogravimetrično analizo, FTIR analizo in merimo njihove zgornje kurilne vrednosti. Rezultati kažejo, da so lastnosti toreficirane biomase močno odvisne od temperature torefikacije. Med procesom torefikacije se ne izgublja samo masa biomase, ampak tudi energijska vsebnost, ki se sprošča v obliki hlapov. Vendar se v plinasto fazo izgubi več mase kot energije. Ta pojav povzroči višjo kurilno vrednost toreficirane biomase. Zaradi dehidracijskih reakcij, ki potekajo med torefikacijo, je adsorpcija vlage toreficirane biomase zelo omejena. Te reakcije preprečujejo vezavo vodika v biomasi z vodo, zato je vsebnost vlage precej manjša v primerjavi z vsebnostjo vlage v surovi biomasi. The direct use of agricultural and wood residues as fuel is usually hindered due to their poor energy properties. Torrefaction is a method that helps us upgrade biomass into a product with improved energy properties. The aim of this thesis is to study the processes of biomass torrefaction, the adsorption of metals on torrefied biomass, and the adsorption of moisture on raw and torrefied samples. We need to demonstrate that the properties of torrefied biomass differ from those of the original biomass. First, we perform torrefaction on our sample at different temperatures, then analyze the mass loss and mass yield. We adsorb metals onto the sample torrefied at the highest temperature. All obtained samples are analyzed using thermogravimetric analysis, FTIR analysis, and by measuring their higher heating values. The results show that the properties of torrefied biomass are strongly dependent on the torrefaction temperature. During the torrefaction process, not only is the biomass mass lost, but also the energy content, which is released in the form of volatiles. However, more mass than energy is lost to the gas phase. This phenomenon results in a higher heating value of the torrefied biomass. Due to the dehydration reactions that occur during torrefaction, the moisture adsorption of torrefied biomass is very limited. These reactions prevent the bonding of hydrogen in the biomass with water, resulting in a much lower moisture content compared to the moisture content of raw biomass. biomasa torefikacija adsorpcija termogravimetrična analiza FTIR analiza zgornja kurilna vrednost biomass torrefaction adsorption thermogravimetric analysis FTIR analysis higher heating value true true false I. Silić Slovenski jezik Angleški jezik Diplomsko delo/naloga 2024-07-05 18:44:07 2024-09-09 09:05:32 2024-11-22 03:10:25 0000-00-00 00:00:00 2024 0 Maribor 0 Maribor 1 spletni vir (1 datoteka PDF (X, 44 f.)) 0000-00-00 NiDoloceno NiDoloceno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 66.092-97:[604.4:662.6:579](043.2) 215947267 UN_Silic_Ilda_2024.pdf UN_Silic_Ilda_2024.pdf 1 8607B750D4D6087BC748DFE1AC41D2CB 9eb510113a0f3ad35441949857615fc873111bfaf69547215a2a665a87f2417f 1920e029-6c99-11ef-8fd5-00155d000105 https://dk.um.si/Dokument.php?lang=slv&id=184599 Fakulteta za kemijo in kemijsko tehnologijo 0 0 0