CO2 valorisation to methane on highly stable iron impregnated ceria-zirconia based 3D-printed catalyst
The catalytic activity of 3D-printed metal monoliths loaded with iron impregnated ceria-zirconia mixed-oxide support on CO2 conversion to methane was investigated between 300 and 500 °C under 1 bar and 20 bar pressure. The catalyst was characterised using TPR, XRD, SEM-EDX and in-situ DRIFTS. At 400...
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Published in | Journal of CO2 utilization Vol. 72; p. 102501 |
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Main Authors | , , , , , , |
Format | Journal Article |
Language | English |
Published |
Elsevier Ltd
01.06.2023
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Subjects | |
Online Access | Get full text |
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Summary: | The catalytic activity of 3D-printed metal monoliths loaded with iron impregnated ceria-zirconia mixed-oxide support on CO2 conversion to methane was investigated between 300 and 500 °C under 1 bar and 20 bar pressure. The catalyst was characterised using TPR, XRD, SEM-EDX and in-situ DRIFTS. At 400 °C and atmospheric pressure, the catalyst wash-coated monoliths increased the methane yield by 3.5 times and doubled the CO2 conversion compared to the same catalyst dispersed as a powder. Methane selectivity of 95.2% was obtained at 400 °C and 20 bars pressure. This is the highest methane selectivity recorded in the literature for CO2 methanation using an iron catalyst. The catalyst loaded monoliths were stable over a continuous operation of 100 h at 500 °C and 20 bar. Such increased methane selectivity and yield combined with a long duration stability as well as an economic and easier synthesis process vouches for the great potential of catalyst loaded 3D monoliths for industrial application.
•3D-printed Fe-based catalyst tested between 300 and 500 °C under 1 bar and 20 bar.•At 400 °C and 1 bar, methane yield increased by 3.5 times and CO2 conversion doubled.•Methane selectivity of 95.2% obtained at 400 °C and 20 bars pressure.•Catalyst stable over 100 h at 500 °C and 20 bars with average methane selectivity 90.66%.•In-situ DRIFTS studies of fresh and spent catalyst revealed formation of bicarbonate and monodentate carbonate intermediates. |
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ISSN: | 2212-9820 2212-9839 |
DOI: | 10.1016/j.jcou.2023.102501 |