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Title:Zmanjšanje količine žlahtnih kovin v deokso katalizatorjih za pripravo vodika : magistrsko delo
Authors:ID Gregorn, Leila Lea (Author)
ID Likozar, Blaž (Mentor) More about this mentor... New window
ID Pečar, Darja (Comentor)
Files:.pdf MAG_Gregorn_Leila_Lea_2025.pdf (2,88 MB)
MD5: 9110D35BCF11B4C5106EC8346005265F
 
Language:Slovenian
Work type:Master's thesis/paper
Typology:2.09 - Master's Thesis
Organization:FKKT - Faculty of Chemistry and Chemical Engineering
Abstract:Z naraščajočim globalnim interesom za brezogljične vire energije postaja vodik pomemben nosilec prihodnje energetske tranzicije. Trenutno se večina vodika še vedno proizvaja iz fosilnih goriv s postopki, ki povzročajo emisije toplogrednih plinov, vendar se kot trajnostna alternativa vse bolj uveljavlja elektroliza vode. Elektrolitski razcep vode ob prisotnosti električne energije omogoča proizvodnjo čistega vodika (t. i. zeleni vodik), v kolikor je elektrika pridobljena iz obnovljivih virov. Za učinkovito uporabo zelenega vodika je ena ključnih zahtev ustrezno čiščenje plina, saj vodik pogosto vsebuje sledove kisika, ki je stranski produkt elektrolize. Prisotnost kisika lahko negativno vpliva na delovanje občutljivih naprav, kot so gorivne celice, zato je potrebna njegova odstranitev. Eden izmed uveljavljenih pristopov za to je uporaba deokso katalizatorjev, ki omogočajo rekombinacijo vodika in kisika v vodo. Tradicionalno se za te katalizatorje uporabljajo plemenite kovine, kot je paladij, ki zagotavlja visoko aktivnost, vendar so njihova cena in omejena razpoložljivost pomembni omejitveni dejavniki. V sodobnem razvoju materialov se zato vse več pozornosti posveča optimizaciji katalizatorjev, kjer se preučujejo možnosti delne nadomestitve žlahtnih kovin z bolj dostopnimi elementi, kot je baker. Uporaba bakra v kombinaciji s paladijem lahko pripomore k zmanjšanju stroškov in izboljšanju stabilnosti katalizatorjev, ob ohranjanju ali celo izboljšanju katalitske učinkovitosti. Pomembno vlogo pri tem ima izbira nosilca, kot sta Al2O3 ali TiO2, ter način priprave in porazdelitve aktivnih komponent. Celostno razumevanje delovanja teh sistemov vključuje vpliv procesnih parametrov, kot sta temperatura in pretok plinov, ki lahko bistveno vplivata na konverzijo kisika.
Keywords:baker, deokso katalizator, elektroliza vode, paladij, rekombinacija kisika, vodik
Place of publishing:Maribor
Place of performance:Maribor
Publisher:[L. L. Gregorn]
Year of publishing:2025
Number of pages:1 spletni vir (1 datoteka PDF (VIII, 48 str.))
PID:20.500.12556/DKUM-95273 New window
UDC:66.097.3-039.656(043.2)
COBISS.SI-ID:255612675 New window
Publication date in DKUM:07.10.2025
Views:171
Downloads:19
Metadata:XML DC-XML DC-RDF
Categories:KTFMB - FKKT
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Licences

License:CC BY 4.0, Creative Commons Attribution 4.0 International
Link:http://creativecommons.org/licenses/by/4.0/
Description:This is the standard Creative Commons license that gives others maximum freedom to do what they want with the work as long as they credit the author.
Licensing start date:10.09.2025

Secondary language

Language:English
Title:Reduction of the amount of noble metals in deoxo catalysts for the production of hydrogen
Abstract:With the growing gobal interest in carbon-free energy sources, hydrogen is emerging as a key energy carrier for the future energy transition. Currently, the majority of hydrogen is still produced from fossil fuels through processes that emit greenhouse gases, but water electrolysis in increasingly gaining attention as a sustainable alternative. Electrolytic water splitting using electrical energy allows the production of clean hydrogen (green hydrogen) when electricity is generated from renewable sources. A critical requirement for effective use of green hydrogen is adequate gas purification, as hydrogen produced in in this way often contains trace amounts of oxygen as a by-product. The presence of oxygen can negatively impact the performance of sensitive devices such as fuel cells, making its removal essential. One established approach is the use of deoxo catalysts, which promote the recombination of hydrogen and oxygen into water. Traditionally, noble metals such as palladium have been used for these catalyst duess to their high activity; however, their high cost and limited availability are major limitations. In the modern development of materials, increasing attention is beimg given to optimizing catalysts by partially replacing noble metals with more accessible elements such as copper. The addition of copper to palladium-based systems can reduce cost and enhance stability while maintaining or even improving catalytic efficiency. The choice of support material, such as Al2O3 or TiO2, and the method of preparation and distribution of active components play essential role in this process. Comprehensive understanding of such systems also includes studying process parameters like temperature and gas flow rate, which significantly affect oxygen conversion.
Keywords:copper, deoxo catalysts, hydrogen, oxygen recombination, palladium, water electrolysis


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