Aminopropyl-Functionalized Silica CO₂ Adsorbents via Sonochemical Methods

Table 1

Basic characterisation data.

	SA (m^2·g^−1)		PV (mL·g^−1)	PD (Ǻ)	PS (Ǻ)	HD (g·mL^−1)	C (wt%)	H (wt%)	N (wt%)
±error	5	4	0.01	<0.1	—	<0.01	<0.1	<0.1	<0.1
HX	849	77	0.80	28.9	52	2.04	3.2	1.5	0
A24	713	48	0.55	25.2	52	1.90	8.8	2.2	2.3
S1	712	55	0.56	24.4	52	1.96	8.0	2.1	2.6
S2	680	50	0.53	24.4	52	1.94	8.6	2.2	2.7
S4	712	44	0.53	24.3	51	1.98	8.7	2.3	2.7
S7	667	40	0.47	23.2	51	1.98	10.1	2.4	2.9
S2-NR	695	46	0.52	24.2	52	1.95	8.7	2.2	2.7
S2-N2	695	50	0.51	23.9	49	1.93	9.3	2.3	2.7
S2-25	667	46	0.48	23.5	52	1.93	9.3	2.3	2.9
S2-12	690	47	0.51	24.5	50	1.96	9.1	2.3	2.7

SA: BET surface area; : BET constant; PV: pore volume; PD: BJH pore diameter; PS: separation of pore centres; HD: helium density.
Error estimated from the average of the standard deviations obtained for duplicate measurements obtained for selected materials.
Error listed was obtained from replicate analysis of a similar set of materials.