CO₂-Philic [EMIM][Tf₂N] Modified Silica in Mixed Matrix Membrane for High Performance CO₂/CH₄ Separation

Table 2

Elemental composition of virgin silica and ionic liquid modified silica particles.

Sample	Element (wt)
	Si	N	O	F
Virgin Sil	39.39	-	60.61	-
1.0:0.5	50.58	2.21	42.29	4.92
1.0:1.0	49.87	0.32	49.24	0.57
1.0:1.5	51.71	1.46	43.46	3.48
1.0:2.0	53.26	1.00	43.64	2.10
1.0:2.5	54.14	0.61	43.75	1.50