20.500.12556/RUL-183951 Analiza procesa in kinetike katalitične metanacije v cevnem reaktorju Analysis of the process and kinetics of catalytic methanation in a tubular reactor Metanacija je eden od procesov, s katerimi lahko hkrati rešujemo problem globalnega segrevanja ter učinkovito izkoriščanje in shranjevanje električne energije iz obnovljivih virov. Proces poteka ob prisotnosti ustreznega katalizatorja, na katerem se odvije kemijska reakcija, pri kateri se vodik in ogljikov dioksid pretvorita v metan in vodno paro. V okviru magistrskega dela smo z določenimi predelavami že obstoječe eksperimentalne proge za izvajanje metanacije izvedli meritve pri različnih temperaturah, vstopnih pretokih in razmerjih reaktantov. Rezultati so pokazali, da največ metana nastane pri vstopnem razmerju reaktantov CO₂ : H₂ = 1 : 4, pri skupnem vstopnem pretoku reaktantov 20 ml/min v reaktor ter pri temperaturi 327 °C v notranjosti reaktorja. Določili smo dve empirični funkciji za napovedovanje deleža metana v produktih, ki veljata za obravnavani reaktor. Na podlagi teorije smo izpeljali enačbo za modeliranje kinetike reakcije metanacije ter poteka koncentracij reaktantov vzdolž reaktorja, pri čemer smo dobljene rezultate primerjali z eksperimentalnimi rezultati. Methanation is one of the processes that enables the simultaneous mitigation of global warming and the efficient utilization and storage of electrical energy from renewable energy sources. The process takes place in the presence of a suitable catalyst, on whose active surface a chemical reaction occurs in which hydrogen and carbon dioxide are converted into methane and water vapor. Within the scope of this master’s thesis, measurements were carried out at various temperatures, inlet flow rates, and reactant ratios following certain modifications of an existing experimental setup for methanation. The results showed that the highest methane production is achieved at an inlet reactant ratio of CO₂ : H₂ = 1 : 4, a total inlet volumetric flow rate of 20 ml/min to the reactor, and a reactor internal temperature of 327 °C. Two empirical correlations were determined for predicting the methane fraction in the product stream, both valid for the reactor under consideration. Based on theoretical considerations, an equation was derived to model the kinetics of the methanation reaction and the axial concentration profiles of the reactants along the reactor, and the obtained results were compared with experimental data. metanacija vodik ogljikov dioksid empirične funkcije modeliranje kinetike methanation hydrogen carbon dioxide empirical functions kinetic modeling true false false [D. Završek] Slovenski jezik Angleški jezik Magistrsko delo/naloga 2026-06-23 08:31:41 2026-06-23 08:31:46 2026-07-01 13:42:37 0000-00-00 00:00:00 2026 0 Ljubljana 0 XX, 71 str. 0000-00-00 NiDoloceno NiDoloceno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 547.211:661.96(043.2) 285793 283263747 47029.pdf 47029.pdf 1 8ADE287FE1718145D70865D838E551AB d5208b0f436850c2642ba1cdeda37fbc0f0d2a52035e5d775a3a89aa2406b7c6 21b32ee6-6ecd-11f1-9b0d-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=236287 Fakulteta za strojništvo 0 0 0