Simultaneous activity and stability increase of co-precipitated Ni–Al CO 2 methanation catalysts by synergistic effects of Fe and Mn promoters
For CO 2 methanation, the development of highly active and thermostable catalysts is indispensable to cope with the demands of SNG purity in single-pass fixed-bed operation and the exothermal character of the reaction. In this work, a co-precipitated NiAlO x catalyst with an equimolar Ni/Al ratio is...
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| Veröffentlicht in: | Catalysis science & technology 2018-11, Vol.8 (22), p.5920-5932 |
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| container_title | Catalysis science & technology |
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| creator | Burger, Thomas Koschany, Franz Wenng, Andreas Thomys, Oliver Köhler, Klaus Hinrichsen, Olaf |
| description | For CO
2
methanation, the development of highly active and thermostable catalysts is indispensable to cope with the demands of SNG purity in single-pass fixed-bed operation and the exothermal character of the reaction. In this work, a co-precipitated NiAlO
x
catalyst with an equimolar Ni/Al ratio is modified by the two promoters Mn and Fe. The combination of both dopants can be used to synthesize highly thermostable catalysts with an enhanced catalytic activity. The activity–stability performance is strongly dependent on the Ni/promoter ratios, with Ni/Mn = 9.5 and Ni/Fe = 7 performing best. Besides doping already during co-precipitation, it is shown that for doping
via
impregnation the activity–stability performance for a constant Ni/Fe/Mn ratio can be influenced by the preparation procedure. This offers the unique opportunity to target the activity–stability behavior of a co-precipitated NiAlO
x
catalyst as required. |
| doi_str_mv | 10.1039/C8CY01834K |
| format | Article |
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2
methanation, the development of highly active and thermostable catalysts is indispensable to cope with the demands of SNG purity in single-pass fixed-bed operation and the exothermal character of the reaction. In this work, a co-precipitated NiAlO
x
catalyst with an equimolar Ni/Al ratio is modified by the two promoters Mn and Fe. The combination of both dopants can be used to synthesize highly thermostable catalysts with an enhanced catalytic activity. The activity–stability performance is strongly dependent on the Ni/promoter ratios, with Ni/Mn = 9.5 and Ni/Fe = 7 performing best. Besides doping already during co-precipitation, it is shown that for doping
via
impregnation the activity–stability performance for a constant Ni/Fe/Mn ratio can be influenced by the preparation procedure. This offers the unique opportunity to target the activity–stability behavior of a co-precipitated NiAlO
x
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2
methanation, the development of highly active and thermostable catalysts is indispensable to cope with the demands of SNG purity in single-pass fixed-bed operation and the exothermal character of the reaction. In this work, a co-precipitated NiAlO
x
catalyst with an equimolar Ni/Al ratio is modified by the two promoters Mn and Fe. The combination of both dopants can be used to synthesize highly thermostable catalysts with an enhanced catalytic activity. The activity–stability performance is strongly dependent on the Ni/promoter ratios, with Ni/Mn = 9.5 and Ni/Fe = 7 performing best. Besides doping already during co-precipitation, it is shown that for doping
via
impregnation the activity–stability performance for a constant Ni/Fe/Mn ratio can be influenced by the preparation procedure. This offers the unique opportunity to target the activity–stability behavior of a co-precipitated NiAlO
x
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2
methanation, the development of highly active and thermostable catalysts is indispensable to cope with the demands of SNG purity in single-pass fixed-bed operation and the exothermal character of the reaction. In this work, a co-precipitated NiAlO
x
catalyst with an equimolar Ni/Al ratio is modified by the two promoters Mn and Fe. The combination of both dopants can be used to synthesize highly thermostable catalysts with an enhanced catalytic activity. The activity–stability performance is strongly dependent on the Ni/promoter ratios, with Ni/Mn = 9.5 and Ni/Fe = 7 performing best. Besides doping already during co-precipitation, it is shown that for doping
via
impregnation the activity–stability performance for a constant Ni/Fe/Mn ratio can be influenced by the preparation procedure. This offers the unique opportunity to target the activity–stability behavior of a co-precipitated NiAlO
x
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| source | Royal Society Of Chemistry Journals 2008- |
| title | Simultaneous activity and stability increase of co-precipitated Ni–Al CO 2 methanation catalysts by synergistic effects of Fe and Mn promoters |
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