Sub-nanometer ceria-promoted Ni 13X zeolite catalyst for CO₂ methanation

Sub-nanometer ceria-promoted Ni 13X zeolite catalyst for CO₂ methanation

Wei, L. (TU Delft Large Scale Energy Storage)
Grénman, Henrik (Åbo Akademi University)
Haije, W.G. (TU Delft ChemE/Materials for Energy Conversion and Storage)
Kumar, Narendra (Åbo Akademi University)
Aho, Atte (Åbo Akademi University)
Eränen, Kari (Åbo Akademi University)
Wei, L. (TU Delft Sanitary Engineering)
de Jong, W. (TU Delft Large Scale Energy Storage)

2021

Sub-nanometer zeolite 13X-supported Ni-ceria catalysts were synthesized for CO₂ methanation. XRD and SEM results show the structure and morphology of 13X zeolite after impregnation and calcination. Ce loading affected the catalysts’ metal dispersion, reducibility, basicity and acidity, and thence their activity and selectivity. STEM-EDX elemental mappings showed that Ce and Ni are predominantly highly dispersed. Ce has a positive effect on the reduction of NiO and leads to a relatively high number of medium basic sites with a low Ce loading. Highly stable 5%Ni2.5%Ce13X had high activity and nearly 100% CH₄ selectivity in CO₂ methanation at 360 °C, which is mainly due to the high dispersion of metals and relatively high amount of medium basic sites. It can be inferred that this catalyst synthesis strategy has great potential for good catalyst dispersion, since metal uptake by the zeolite is selective for the metal citrate complexes in solution.

Cerium citrate
Citrate complexes
CO methanation
Nickel citrate
Sub-nanometer nickel-ceria on zeolite 13X

http://resolver.tudelft.nl/uuid:2143e10b-341e-4752-9eaa-deaff604d2f5

https://doi.org/10.1016/j.apcata.2021.118012

0926-860X

Applied Catalysis A: General, 612

Institutional Repository

journal article

© 2021 L. Wei, Henrik Grénman, W.G. Haije, Narendra Kumar, Atte Aho, Kari Eränen, L. Wei, W. de Jong