Table 2.

$N_2$ adsorption measurements for CATT, CPER and CLAY samples at different firing temperatures.

Sample	Specific Surface Area (m${}^2$/g)	Total Pore Volume (cm${}^3$/g)	Pore Diameter (nm)
CLAY 800 °C	18.3	0.12	5.46
CLAY 1000 °C	7.02	0.05	1.84
CATT 800 °C	29.53	0.16	2.36
CATT 1000 °C	11.94	0.09	1.61
CPER 800 °C	19.1	0.13	3.66
CPER 1000 °C	9.24	0.08	2.42