20.500.12556/RUL-143290 Analiza procesa metanacije na katalizatorju iz nikljevega(II) oksida nanešenega na osnovo alumine Analysis of methanation process based on nickel(II) oxide catalyst on alumina substrate Katalitična metanacija je kemična reakcija, kjer se iz vodika in ogljikovega dioksida (ali monoksida) proizvede metan oz. sintetični zemeljski plin. Proces predstavlja eno izmed obetavnih rešitev dolgoročnega shranjevanja obnovljivih virov energije in zmanjševanja CO2 emisij, njegovo implementacijo v obstoječe energetske sisteme pa še vedno preprečuje nizka učinkovitost. V ta namen potekajo številne raziskave za izboljšanje reaktorjev in katalizatorjev, del katerih je tudi ta zaključna naloga, ki obravnava delovanje katalizatorja nikljevega(II) oksida na podpori alumine v odvisnosti od različnih procesnih temperatur reaktorja in mešanic reakcijskih plinov. S pomočjo infrardeče kamere in plinskega kromatografa je ugotovljeno, da se s povečevanjem deleža metana v plinski mešanici produktov povečujejo tudi temperaturni gradienti v metanacijski celici. Izbrani katalizator je izkazoval najvišjo učinkovitost pretvorbe reaktantov v metan pri 360 – 370 °C. Rezultati kažejo, da je uporaba IR termografije primerna za vrednotenje temperaturne porazdelitve na površini katalizatorjev in s tem za posredno ugotavljanje učinkovitosti procesa metanacije. Catalytic methanation is a chemical reaction where methane, also known as synthetic natural gas, is produced from hydrogen and carbon dioxide (or monoxide). This process represents one of the most promising solutions for long-term energy storage and CO2 emission reduction, but its implementation in existing energy systems is still affected by low efficiency. To this end, intensive research is taking place to improve catalytic reactors and catalysts. This thesis contributes to the latter by analysing the performance of the catalytic conversion over the alumina-supported nickel(II) oxide catalyst at different reactor temperatures and reactant gas mixtures. By using an infrared camera and gas chromatograph, it was found that as the proportion of methane in the product gas mixture increases, so do the temperature gradients in the methanation cell. The analysed catalyst showed the highest conversion efficiency of the reactants into methane at 360 – 370 °C. The results show that IR thermography is a suitable method for evaluating the temperature distribution on the catalyst’s surface and for indirect determination of the methanation process efficiency. metanacija vodik ogljikov dioksid NiO katalizator IR termografija methanation hydrogen carbon dioxide NiO catalyst IR thermography true false false [J. Tabaković] Slovenski jezik Angleški jezik Zaključna naloga 2022-12-13 08:30:24 2022-12-13 08:30:31 2023-02-03 10:34:55 0000-00-00 00:00:00 2022 0 Ljubljana 0 XIII, 44 f. 0000-00-00 NiDoloceno NiDoloceno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 66.021.2.071.4:544.344.016.2:543.572.3(043.2) 248914 140591619 22574.pdf 22574.pdf 1 71C253F04DE8C17E10788868D1898B8D 8a5c9bf2ec0a63591dcc6a4ec38bf178fb9df16b3bcddd0c02b68ff28792eba7 db57915d-7ab7-11ed-9c94-00155dcfd717 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=164919 Fakulteta za strojništvo 0 0 0