Paper details

Title:

CO₂ Methanation over Ni Catalysts Supported on Hydrothermally Prepared Pr-doped CeO₂ Nanostructures

Author(s):

Tsiotsias, A.I., Charisiou, N.D., Zotos, C., Sebastian, V., Polychronopoulou, K., Goula, M.A.

Document(s):

Abstract:

CO2 methanation is commonly regarded as a very important reaction in Power-to-Gas applications and biogas upgrading. In this study, Ni catalysts supported on Pr-doped CeO2 nanostructures of different morphology were prepared, characterized, and evaluated regarding their CO2 methanation performance. Variation of the hydrothermal treatment temperature and solution pH led to the formation of different Pr-CeO2 nanostructures. The use of a concentrated NaOH solution led to highly-ordered Pr-CeO2 nanostructures (nanorods at 100 oC and nanocubes at 180 oC), whereas the use of a less basic NH3/(NH4)2CO3 buffer led to larger nanoparticles consisting of smaller aggregated crystallites. The Ni catalysts supported on Pr-CeO2 prepared with NH3/(NH4)2CO3 were far superior in catalytic activity compared to the ones supported on Pr-CeO2 prepared with concentrated NaOH, whereas the variation of the hydrothermal treatment temperature had a much lesser effect on the catalytic activity.

Keywords:

catalytic conversion, hydrogen, methane, reactivity, CO₂ reduction, carbon dioxide (CO₂)

Topic:

Biomass Conversion to Intermediate Bioenergy Carriers and Sustainable Biofuels

Subtopic:

Synthetic fuels from biomass and hydrogen

Event:

30th European Biomass Conference and Exhibition

Session:

5BV.4.6

Pages:

888 - 894

ISBN:

978-88-89407-22-6

Paper DOI:

10.5071/30thEUBCE2022-5BV.4.6

Price:

FREE