Table 1.

Elemental analysis of the samples studied.

Sample	C (%)	H (%)	N (%)	C (mmol·g−1)	N (mmol·g−1)	C/N	MTAC a
MSS	0.24	0.42	0.04	0.21	0.03	-	-
MSG20	7.44	1.53	2.46	5.86	1.76	3.33	0.88
MSG20I30	21.08	5.39	10.62	17.57	7.59	2.31	3.80

^a Maximum theoretical adsorption capacity by chemisorption, mmol CO₂ g⁻¹.