Table 4.

Pore structure parameters of HCl-CGCS with different acid immersion temperatures.

T (°C)	as,BET (m2/g)	Total Pore Volume (cm3/g)	Average Pore Diameter (nm)
T = 20	43.5290	0.0244	2.2414
T = 30	61.2870	0.0318	2.0733
T = 40	87.2240	0.0455	2.0885
T = 50	117.5300	0.0588	2.0016
T = 60	115.7700	0.0617	2.1332
T = 70	172.7800	0.0915	2.1191
T = 80	199.8900	0.1111	2.2237
T = 90	257.8400	0.1482	2.2987
T = 95	248.2500	0.0920	2.4819