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Impact of the incipient wetness impregnation sequence during the preparation of La or Ce promoted NiCu-Al2O3 on low-temperature hydrodeoxygenation
oleh: Tom Vandevyvere, Maarten K. Sabbe, Alexandra Bouriakova, Shunmugavel Saravanamurugan, Joris W. Thybaut, Jeroen Lauwaert
| Format: | Article |
|---|---|
| Diterbitkan: | Elsevier 2023-08-01 |
Deskripsi
The performance of La- or Ce-promoted NiCu-Al2O3 catalysts in the low-temperature (200 °C) hydrodeoxygenation (HDO) is assessed. Co-impregnation of the promoter with NiCu does not affect the bulk structure, although the catalytic activity of the Ce-promoted catalyst increases due to strong NiCu-Ce interactions. For sequential impregnation, the impregnation order for Ce improves either the HDO selectivity or the activity. For La, both sequentially impregnated catalysts exhibit an improved HDO selectivity, but a different activity. First impregnating La is especially interesting due to the catalysts enhanced stability after an initial deactivation period of 30 h TOS.