Highly Loaded Mesoporous Ni–La₂O₃ Catalyst Prepared by Colloidal Solution Combustion Method for CO₂ Methanation

• Main Authors: Guoli Tang, Dandan Gong, Hui Liu, Luhui Wang
• Format: Article
• Language: English
• Published: MDPI AG 2019-05-01
• Series: Catalysts
• Subjects: highly loaded Ni catalyst; La₂O₃; colloidal solution combustion; CO₂ methanation
• Online Access: https://www.mdpi.com/2073-4344/9/5/442
• ISSN: 2073-4344

Highly dispersed Ni-based catalysts for CO₂ methanation have been extensively studied over the last decade. However, a highly loaded Ni-based catalyst always results in a large Ni particle size and poor CO₂ methanation activity. In this work, a colloidal solution combustion method was used to prepare a highly loaded Ni–La₂O₃ catalyst (50 wt % Ni) with a small Ni particle size and abundant metal–support interface. The characterizations demonstrated that a Ni–La₂O₃ catalyst prepared in this way has a mesoporous structure and a small Ni particle size. Due to the small Ni particle size and abundant metal–support interface, the highly loaded mesoporous Ni–La₂O₃ catalyst exhibits higher activity and selectivity in CO₂ methanation compared to the Ni–La₂O₃ catalyst prepared by a conventional solution combustion method.