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The Effects of Ce and W Promoters on the Performance of Alumina-Supported Nickel Catalysts in $CO_{2}$ Methanation Reaction
| Content Provider | MDPI |
|---|---|
| Author | Grzegorz, Słowik Marcin, Kuśmierz Gac, Wojciech Zawadzki, Witold Greluk, Magdalena Rotko, Marek |
| Copyright Year | 2021 |
| Description | The influence of Ce and W promoters on the performance of alumina-supported nickel catalysts in the $CO_{2}$ methanation reaction was investigated. The catalysts were obtained by the co-impregnation method. Nitrogen low-temperature adsorption, temperature-programmed reduction, hydrogen desorption, transmission electron microscopy, X-ray diffraction, and photoelectron spectroscopy studies were used for catalyst characterization. An introduction of Ce and W promoters (1–5 wt %) led to the decrease in mean Ni crystallite size. Gradual increase in the active surface area was observed only for Ce-promoted catalysts. The increase in $CO_{2}$ conversion in methanation reaction at low-reaction temperatures carried out over Ce-promoted catalysts was attributed to the increase in the active surface area and changes in the redox properties. The introduction of small amounts of tungsten led to an increase in the activity of catalysts, although a decrease in the active surface area was observed. Quasi in situ XPS studies revealed changes in the oxidation state of tungsten under $CO_{2}$ methanation reaction conditions, indicating the participation of redox promoter changes in the course of surface reactions, leading to an improvement in the activity of the catalyst. |
| Starting Page | 13 |
| e-ISSN | 20734344 |
| DOI | 10.3390/catal12010013 |
| Journal | Catalysts |
| Issue Number | 1 |
| Volume Number | 12 |
| Language | English |
| Publisher | MDPI |
| Publisher Date | 2021-12-24 |
| Access Restriction | Open |
| Subject Keyword | Catalysts Nickel Catalyst Alumina Support Ce Promoter W Promoter Co2 Methanation |
| Content Type | Text |
| Resource Type | Article |
