Evaluation of Optimal Pore Size of (3-Aminopropyl)triethoxysilane Grafted MCM-41 for Improved CO₂ Adsorption

Table 1

Pore structure parameters of the MCM-41s used different amount of swelling agent.

Sample	m^2/g	cm^3/g	cm^3/g	cm^3/g	%	nm
MCM-41-r0	865	1.00	0.27	0.73	0.73	4.64
MCM-41-r2	771	0.98	0.24	0.74	0.76	5.12
MCM-41-r4	696	0.97	0.22	0.75	0.77	5.61
MCM-41-r6	784	1.28	0.24	1.04	0.81	6.57
MCM-41-r8	780	1.61	0.28	1.33	0.83	7.50

: surface area calculated using BET equation.
: total pore volume estimated at relative pressure.
: micropore volume is determined from the Dubinin-Radushkevich equation.
: subtraction of micropore volume from total volume.
: fraction of mesopore volume.
: the average pore diameter.