Biogas Reforming over Al-Co Catalyst Prepared by Solution Combustion Synthesis Method

• Main Authors: Manapkhan Zhumabek, Galina Xanthopoulou, Svetlana A. Tungatarova, Tolkyn S. Baizhumanova, George Vekinis, Dmitry Yu. Murzin
• Format: Article
• Language: English
• Published: MDPI AG 2021-02-01
• Series: Catalysts
• Subjects: biogas; synthesis gas; reforming; composite materials
• Online Access: https://www.mdpi.com/2073-4344/11/2/274

The results of carbon dioxide reforming of CH₄ (model biogas) on catalysts prepared by solution combustion synthesis (SCS) and impregnation of moisture capacity methods are presented. Investigation of the activity of catalysts synthesized from initial mixtures of Co(NO₃)₂-Al(NO₃)₃-urea of different compositions was carried out for the production of synthesis-gas, and SCS and traditional incipient wetness impregnation catalyst preparation methods were compared. The methane conversion reached 100%, and the conversion of CO₂ increased to 86.2%, while the yield of H₂ and CO was 99.2% and 85.4%, respectively, at 900 °C. It was found that CoAl₂O₄ spinel formation was due to substitution of Al³⁺ with Co²⁺ cations. Consequently, CoAl₂O₄ lattice parameters increased, since the ionic radius of Al³⁺ (0.51Å) less than Cο²⁺ (0.72 Å). Advantages of SCS catalysts in comparison with catalysts prepared by the traditional incipient wetness impregnation method in dry reforming of methane were shown. The aim of this work is to develop a new catalyst for the conversion of model biogas into synthesis gas, which will contribute to the organization of a new environmentally friendly, energy-saving production in the future.