Modifying Spinel Precursors for Highly Active and Stable Ni‐based CO ₂ Methanation Catalysts

In CO2 methanation, spinel phases are often considered as undesirable leading to deactivation. However, they can also be well-dispersed solid solutions suitable catalyst precursors the formation of highly active and finely dispersed sites. Though, spinels such NiAl2O4, which form when Ni/Al2O3 supported catalysts used, require high reduction temperatures become active. To obtain a precursor, reducibility must improved so that it activated under conventional conditions. The phase is modified by introducing manganese, known distort structure, Ni0.9MnxAl2-xO4 (0≤x≤2) new precursor. These exhibit significantly at low temperatures. By adjusting manganese content, methane yield 38.7 % was achieved 350 °C conditions more than twice reference (SPP2080-IMRC).