Co-Promoted Ni Nanocatalysts Derived from NiCoAl-LDHs for Low Temperature CO2 Methanation

Ni-based catalysts are prone to agglomeration and carbon deposition at high temperatures. Therefore, the development of with activities low temperatures is a very urgent challenging research topic. Herein, nanocatalysts containing Co promoter mosaic structure were prepared by reduction NiCoAl-LDHs, used for CO2 methanation. When reaction temperature 250 °C (0.1 MPa, GHSV = 30,000 mL·g−1·h−1), conversion on NiCo0.5Al-R catalyst reaches 81%. However, under same test conditions, NiAl-R only 26%. The low-temperature activity significantly improved due which can effectively control size Ni particles, so that contains more active sites. CO2-TPD results show also regulate number moderately basic sites in catalyst, beneficial increase amount adsorbed. More importantly, still maintains catalytic performance after 92 h continuous reaction. This confinement effect AlOx substrate inhibiting nanoparticles. stability method have broad industrial application prospects.