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Title:Impregnacija grafen oksida za uporabo pri dehidraciji fruktoze
Authors:ID Peršak, Špela (Author)
ID Pečar, Darja (Mentor) More about this mentor... New window
ID Goršek, Andreja (Comentor)
Files:.pdf VS_Persak_Spela_2025.pdf (8,01 MB)
MD5: 8B8EE2FA9B524DA7779205A5771CC0F3
 
Language:Slovenian
Work type:Bachelor thesis/paper
Typology:2.11 - Undergraduate Thesis
Organization:FKKT - Faculty of Chemistry and Chemical Engineering
Abstract:Zanimanje za iskanje novih načinov pridobivanja energije in kemikalij je v velikemu porastu. Odvisnost od fosilnih goriv in neobnovljivih virov je velika, in ves čas poskušamo najti nove načine za pridobivanje energije. Predvsem 5-hidroksimetilfurfural (5-HMF) je obravnavan kot pomembna surovina za pridobivanje bioplastike in biogoriv. 5-HMF lahko pridobimo s katalizirano reakcijo različnih ogljikovih hidratov, kot so na primer fruktoza, glukoza, celuloza in inulin. Najbolj razširjen in najcenejši ogljikov hidrat, iz katerega pridobivamo 5-HMF je glukoza, vendar je izkoristek nekoliko nižji, zato je vedno večji poudarek na pridobivanju 5-HMF iz fruktoze. Namen našega dela je bila impregnacija grafen oksida s kovinskim katalizatorjem za uporabo pri dehidraciji fruktoze. Izvedli smo sintezo grafen oksida, ki služi kot nosilec za katalizator, pri čemer smo proučili vpliv različnih procesnih parametrov na uspešnost sinteze. Z mokro impregnacijo smo na sintetiziran material vezali nikelj kot aktivno komponento katalizatorja in izvedli reakcijo dehidracije fruktoze. Sintetizirane katalizatorje smo okarakterizirali z infrardečo spektroskopijo s Fourierjevo transformacijo, Brunauer-Emmett-Teller metodo fizisorpcije dušika, material pogledali pod vrstičnim elektronskim mikroskopom in izvedli temperaturno programirano desorpcijo z amonijakom. Pri različnih procesnih pogojih smo izvedli reakcijo dehidracije fruktoze v 5-hidroksimetilfurfural in na podlagi rezultatov, pridobljenih z visokotlačno tekočinsko kromatografijo, določili presnovo reakcije in kinetične parametre. Določili smo najprimernejšo sintezno pot za namen reakcije in potrdili primernost grafen oksida kot nosilca za kovinske katalizatorje.
Keywords:grafen oksid, dehidracija fruktoze, mokra impregnacija, DMSO, nikelj
Place of publishing:Maribor
Year of publishing:2025
PID:20.500.12556/DKUM-94717 New window
Publication date in DKUM:18.09.2025
Views:105
Downloads:66
Metadata:XML DC-XML DC-RDF
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:26.08.2025

Secondary language

Language:English
Title:Graphene oxide impregnation for use in dehydration of fructose
Abstract:Interest for finding new ways to produce energy and chemicals in on surge. Our dependance on fosil fuels and non-renewable sources is big, and we are trying to find new ways to produce energy. Important chemical for producing bioplastics and biofuel is 5-hidroxymethilfurfural (5-HMF). It is produced by catalised reaction of various carbohydrates, like glucose, fructose, celulose and inulin. By far most abundant and cheapest carbohidrate for production of 5-HMF is glucose, but the yield is low, so it is better to produce it from fructose. The goal of our work was impregnation of graphene oxide with metal catalyst for use in dehidration of fructose. We sintesized graphene oxide, which is used as support for catalyst, at which we studied the variables in sintesis process. We binded nickel to the support with wet impregnation. Support wass characterised with infrared spectroscopy with Fourier transformation, Brunauer-Emmett-Teller phisiosorption of nitrogen, we looked at our material under scaning electron microscope and did teperature programmed desorption of amonia. Under different circumstances we carried out a reaction of dehidration of fructose and based on results, checked under high pressure liquid cromatography, defined kinetical properties. We determined the best sinthesis parameters and proved that graphene oxide is good support for metal catalysts.
Keywords:graphene oxide, dehidration of fructose, wet impregnation, DMSO, nickel


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