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- 저자 : M. Siebenhofer (검색결과 1 건)
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The reaction kinetics of CO2 methanation on a bifunctional Ni/MgO catalyst
A. Loder,M. Siebenhofer,S. Lux 한국공업화학회 2020 Journal of Industrial and Engineering Chemistry Vol.85 No.-
A bifunctional Ni/MgO catalyst was prepared to catalyze CO2 methanation and make use of CO2 as anabundant hydrogen storage facility. The effect of Ni loading and MgO quality on the rate of methanationwas tested in a temperature range of 533–648 K. The Ni loading was varied between 0 to 27 wt.% onMgO. To investigate the impact of matrix elements, a MgO/CaO support was tested with 21 wt.%. nickelloading. Further, the role of MgO in the bifunctional catalyst was proven. The reaction kinetics wasmodeled with a Langmuir–Hinshelwood approach considering the bifunctional character of thecatalyst. Nickel provides the adsorbent capacity for hydrogen and is highly selective for methane. MgOactivates CO2 through chemisorption. Increasing Ni loading of the catalyst increased the rate of CO2conversion. According to the results, the mechanism of CO2 methanation did not change with Niloading. The Ni/MgO catalyst acted as a robust, active and highly selective catalyst for CO2methanation. With CO2 conversion of 87%, the selectivity to methane was99%. Besides excellent catalytic activitythe catalysts suffice the necessity of simple catalyst preparation, usage and recyclability for industrialapplicability of CO2 methanation.
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