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.
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