Comparative Study of Textural Characteristics on Methane Adsorption for Carbon Spheres Produced by CO₂ Activation

Table 1

Structural characteristics of the studied samples.

Sample	Specific surface area (BET, m^2/g)	Micropore volume; (D-A, cm^3/g)	Total pore volume (cm^3/g)	𝑉micro/𝑉total (%)	Average pore diameter (nm)
CS0	422.7	0.219	0.238	92.02	2.254
CS3	658.4	0.336	0.428	78.50	2.602
CS6	881.7	0.461	0.557	82.76	2.529
CS9	1145.0	0.639	0.732	87.30	2.556