Table 5.

Zeolite’s physical and chemical properties (Siriwardane et al. 2005; Nikolaidis et al. 2018; Zhao et al. 2018). CO₂, carbon dioxide and N₂, nitrogen

Property	Unit	Type of zeolitesa
		4A	5A	APG-II	WE-G 592	13X
Earth metal modifier	–	NAb	Ca	NA	NA	NA
Pore diameter	Å	4	5	10	10	10
Zeolite surface area	m2.g−1	NA	NA	710	625	710
Aluminum content	wt%	13.6	14.8	10.7	15.6	14.2
Silicon content	wt%	16.1	16.7	14.3	16.5	18.2
Breakthrough timec	min	9	13	15	24	20
Adsorbent mass	g	7.21	6.53	6.40	12.46	19.3
CO2 loadingc	mmol g−1	0.5	0.38	0.38	0.6	0.7
Gas flow rate	cm3 min−1	5	5	5	5	5
selectivity (CO2/N2)c	–	NA	NA	NA	15.5	23.11
Potential application	–	NA	NA	NA	Post-combustion	Post-combustion
Heat of adsorptionc	kJ mol−1	− 56	− 63	− 66	− 55	− 63

^aAll zeolites are represented by their commercial names

^bNot available

^cData reported at 120 °C and 1 atm