Katalitična metanacija vodika in ogljikovega dioksida ob prisotnosti nikljevega katalizatorja

Gorše, Leon (author), Golobič, Iztok (mentor), Zupančič, Matevž (comentor)

Katalitična metanacija predstavlja eno izmed boljših in okolju prijaznejših rešitev za trenutno aktualno problematiko rabe zemeljskega plina in prehoda na obnovljive vire energije. S tem procesom vzpostavimo tri glavne pozitivne posledice; iz ozračja porabljamo nekoristen in nezaželen ?CO?_2, shranjujemo oz. preoblikujemo viške energije, ki nastajajo na obnovljivih virih energije, hkrati pa ustvarjamo koristen produkt ?CH?_4 – sintetični zemeljski plin, ki ga bomo v industriji nujno potrebovali še dolgo za dolgotrajen in uspešen prehod na okolju prijaznejše vire energije. V sklopu izpopolnjevanja procesa katalitične metanacije potekajo mnoge raziskave, med katere spada tudi ta zaključna naloga. Pozornost posvečamo izbiri najbolj optimalnih pogojev za proces metanacije ob prisotnosti katalizatorja NiO. Na podlagi IR termografije in plinske kromatografije je ugotovljeno, da je reakcija skozi nasutje katalizatorja najuspešnejša pri procesni temperaturi 300 °C. Pri njej temperaturni porasti dosežejo vrednosti do 20 K, delež metana pa se zaustavi pri 50,90 %. Poleg tega je v produktih moč zaslediti večji delež metana pri višjem molskem razmerju H_2:?CO?_2 (4:1). Ta sega do 53,60 %, temperaturni porast pa doseže vrednost 10 K. Skupni pretok reaktantov 60 ml/min je primernejši od višjega skupnega pretoka 100 ml/min.

• Language: Slovenian
• Keywords: metanacija, ogljikov dioksid, plinska kromatografija, IR termografija, vodik, procesni reaktor
• Work type: Bachelor thesis/paper
• Typology: 2.11 - Undergraduate Thesis
• Organization: FS - Faculty of Mechanical Engineering
• Place of publishing: Ljubljana
• Publisher: [L. Gorše]
• Year: 2023
• Number of pages: XVII, 152 str.
• PID: 20.500.12556/RUL-146833
• UDC: 66.021.2.071:543.544.3(043.2)
• COBISS.SI-ID: 156194307
• Publication date in RUL: 15.06.2023

GORŠE, Leon, 2023, Katalitična metanacija vodika in ogljikovega dioksida ob prisotnosti nikljevega katalizatorja [online]. Bachelor’s thesis. Ljubljana : L. Gorše] . [Accessed 7 April 2025]. Retrieved from: https://repozitorij.uni-lj.si/IzpisGradiva.php?lang=eng&id=146833

Secondary language

• Language: English
• Title: Catalytic methanation of hydrogen and carbon dioxide in the presence of a nickel catalyst

Abstract

Catalytic methanation represents one of the better and more environmentally friendly solutions for the current issue of natural gas use and the transition to renewable energy sources. Through this process we establish three main positive consequences; we consume useless and undesirable 〖CO〗_2 from the atmosphere, we store or transform excess energy generated from renewable energy sources, and at the same time we create a useful product 〖CH〗_4 – synthetic natural gas, which we will absolutely need in the industry for a long time to come for a long-term and successful transition to more environmentally friendly energy sources. As part of the improvement of the catalytic methanation process, many researches are being carried out, among which belongs also this final thesis. We pay attention to the selection of the most optimal conditions for the methanation process in the presence of the NiO catalyst. Based on IR thermography and gas chromatography, it is established that the reaction through the filling of the catalyst is most successful at a process temperature of 300 °C. In it, temperature increases reach values of up to 20 K, and the proportion of methane stops at 50,90 %. In addition, a higher proportion of methane can be found in the products at a higher molar ratio of H_2:〖CO〗_2 (4:1). This reaches up to 53,60 %, and the temperature rise reaches a value of 10 K. Total reactant flow rate of 60 ml/min is preferable to a higher total reactant flow rate of 100 ml/min.

• Keywords: methanation, carbon dioxide, gas chromatography, IR thermography, hydrogen, process reactor