magistrsko delo
Andrej Žerjal (Author), Igor Plazl (Mentor), Marjan Marinšek (Thesis defence commission member), Albin Pintar (Thesis defence commission member)

Abstract

V svetu, ki je prekomerno odvisen od neobnovljivih virov energije, je razvoj novih tehnologij, ki valorizirajo obnovljive vire energije, ključnega pomena. Redukcija levulinske kisline z vodikom ali nekim donorskim reagentom, kot je mravljična kislina, ki pod določenimi pogoji spušča vodik, v prisotnosti določenih katalizatorjev vodi do sinteze γ-valerolaktona (GVL). GVL je primer izhodiščne molekule za sintezo bolj aplikativnih molekul. Poleg tega lahko GVL uporabljamo kot zeleno topilo ali aditiv v gorivih. Namen tega dela je prenos heterogene katalitične reakcije hidrogenacije levulinske kisline v pretočni mikroreaktor. V prvem delu nastopa pregled obstoječe literature. V drugem delu je predstavljen eksperimentalni del, kjer najprej imobiliziram katalizator (Ru/C) na trdno podlago, ki bo nato služila kot stena mikroreaktorja. Imobilizacijo katalizatorja izvajam z dvema metodama, in sicer z metodo vrtenja (ang.: »spin coating«) in z metodo namakanja. V drugem delu eksperimentiranja nastopa testiranje učinkovitosti katalizatorskega sloja na trdni podlagi v pretočnem mikroreaktorju. Iz dobljenih rezultatov sledijo hipoteze in opazke, za katere upam, da bodo pomagale pri nadaljnjem raziskovanju in izboljšanju reakcijskega sistema.

Keywords

biorefinacijski procesi;levulinska kislina;gama valerolakton;kinetika reakcije;katalizatorji;magistrska dela;

Data

Language: Slovenian
Year of publishing:
Typology: 2.09 - Master's Thesis
Organization: UL FKKT - Faculty of Chemistry and Chemical Technology
Publisher: [A. Žerjal]
UDC: 66.094.25(043.2)
COBISS: 172581891 Link will open in a new window
Views: 56
Downloads: 3
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Other data

Secondary language: English
Secondary title: Catalytic Hydrogenation of Levulinic Acid in microreactor between two-plates
Secondary abstract: In a world that is dependent on non-renewable sources of energy, the development of new technologies that harness renewable sources of energy is crucially important. Reduction of levulinic acid with hydrogen or a donor reagent, such as formic acid, which releases hydrogen under certain conditions, in the presence of specific catalysts leads to the synthesis of γ-valerolactone GVL. GVL is an example of a platform molecule. Additionally, GVL can be used as a green solvent or additive in fuels. The aim of this work is to transfer the heterogeneous catalytic reaction of levulinic acid hydrogenation to a continuous flow microreactor. The first part involves a review of existing literature. The second part presents the experimental section, where the catalyst (Ru/C) is first immobilized on a solid substrate, which then serves as the wall of the microreactor. The catalyst immobilization is carried out using two methods: spin coating and soaking. The second part of the experimentation involves testing the efficiency of the catalyst layer on the solid substrate in the continuous flow microreactor. From the obtained results, I made several hypotheses and observations, which I hope will aid in further research and improvement of this reaction system.
Secondary keywords: levulinic acid;gamma valerolactone;hydrogenation;microreactor;Mikroreaktorji;Hidrogeniranje;Univerzitetna in visokošolska dela;
Type (COBISS): Master's thesis/paper
Study programme: 1000376
Embargo end date (OpenAIRE): 1970-01-01
Thesis comment: Univ. v Ljubljani, Fak. za kemijo in kemijsko tehnologijo, smer Kemijsko inženirstvo
Pages: 67 str.
ID: 19970030