diplomsko delo
Tanja Jelovčan (Author), Blaž Likozar (Mentor)

Abstract

Trajnostni obnovljivi viri so platforma, s katere se lahko industrija kemikalij usmeri na biološko raven in s tem zmanjša porabo fosilnih ogljikovodikov. Alternativo standardnim industrijskim postopkom oksidacije sladkorjev z nezaželenimi reagenti predstavlja izvedba oksidacije sladkorjev s pomočjo heterogenih katalizatorjev. Slednji imajo v reakcijah pomembno vlogo, saj jih pospešujejo, njihova aktivnost pa vpliva na končni izkoristek celotnega procesa. V eksperimentalnem delu diplomske naloge sem sintetizirala katalizator 7 ut % Au/ZrO2 in ga z uporabo različnih analitskih tehnik, kot so vrstična elektronska mikroskopija, energijsko disperzijska spektrometrija in rentgenska praškovna difrakcija, primerjala s komercialno dostopnim katalizatorjem 10 ut % Au/TiO2. Preučevala sem površinsko morfologijo, elementno sestavo vzorcev in velikost delcev. S tekočinsko kromatografijo visoke zmogljivosti sem analizirala produkte oksidacije glukoze in tako ovrednotila aktivnost posameznega katalizatorja na različnem nosilcu. Izvedene analize so pokazale, da je bil katalizator, ki sem ga sintetizirala sama, boljši v primerjavi s komercialnim, a kljub temu ne dovolj učinkovit, saj željene molekule, glukarne kisline, nisem pridobila.

Keywords

kataliza;Au katalizator;sladkorji;oksidacija glukoze;aldarne kisline;glukarna kislina;analizne metode;diplomska dela;

Data

Language: Slovenian
Year of publishing:
Typology: 2.11 - Undergraduate Thesis
Organization: UL FKKT - Faculty of Chemistry and Chemical Technology
Publisher: [T. Jelovčan]
UDC: 66.097(043.2)
COBISS: 60822019 Link will open in a new window
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Downloads: 96
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Other data

Secondary language: English
Secondary title: Heterogeneous catalytic oxidation of sugars to aldaric acids
Secondary abstract: Sustainable bio-renewable sources represent a platform from where the chemicals industry can divert onto the biological level, thus reducing the consumption of fossil hydrocarbons. The alternative to standards industrial procedures of sugar oxidation with undesirable reagents present sugar oxidation with the help of heterogeneous catalysts. They play an important role as they accelerate chemical reactions and their activity has an impact on the final yield of the entire process. In the experimental part of the thesis, I synthesised a 7 wt% Au/ZrO2 catalyst and, using different analytical techniques such as scanning electron microscopy, energy dispersive spectroscopy and X-ray powder diffraction, compared it to the 10 wt% Au/TiO2 catalyst, which is commercially available. I examined surface morphology, the element composition of samples and the size of particles. With high-performance liquid chromatography, I analysed the products of glucose oxidation and evaluated the activity of individual catalysts on different carriers. According to the performed analyzes, the catalyst I synthesised proved to be better than the commercial catalyst, yet not effective enough, as I did not obtain the desired molecules of glucaric acid.
Secondary keywords: Au catalyst;glucose oxidation;glucaric acid;
Type (COBISS): Bachelor thesis/paper
Study programme: 1000372
Embargo end date (OpenAIRE): 1970-01-01
Thesis comment: Univ. v Ljubljani, Fak. za kemijo in kemijsko tehnologijo, UNI Kemijsko inženirstvo
Pages: 39 str.
ID: 12746832