Abstract
Mesoporous nano Ni-Al2O3 catalysts were prepared by using Pluronic P123 (P123) and fatty alcohol polyoxyethylene ether (AEO-7) as structure directing agents (SDAs), and applied for CO2 methanation in a continuously stirred tank reactor (CSTR). Compared with NiAl-A prepared by using AEO-7 as SDA and NiAl-N without SDA, NiAl-P prepared by using P123 as SDA possesses ordered mesopores, high Ni dispersion, large metal surface area and amounts of adsorbed CO2, which benefits CO2 conversion. Under the conditions of 1.0 MPa, 300 °C and H2/CO2 ratio of 4, NiAl-P shows the highest CO2 conversion of 74.0% and CH4 yield of 73.6%.
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