Promotion Effect of CaO Modification on Mesoporous Al₂O₃-Supported Ni Catalysts for CO₂ Methanation

Table 1

Textural properties of Ni/CaO-Al₂O₃ catalysts with different CaO contents.

Sample	Specific surface area (m^2/g)	Pore volume (×10^−2 cm^3/g)	Pore diameter (nm)
15Ni/100Al2O3	4.53	1.73	3.60
15Ni/10CaO90Al2O3	9.59	2.97	3.98
15Ni/20CaO80Al2O3	7.17	2.03	3.62
15Ni/30CaO70Al2O3	5.73	2.42	6.68

Specific surface area evaluated using the Brunauer-Emmett-Teller (BET) method. Pore volume calculated from the volume of nitrogen held at / = 0.98~0.99. BJH desorption average pore diameter.