CO₂ Adsorption from Biogas Using Amine-Functionalized MgO

Table 2

Comparison of CO₂ adsorption capacity of amine-impregnated adsorbents.

Support	Amine		Gas composition	Adsorption temperature (°C)	CO2 adsorption capacity (mmol/g)	Reference
	Type	wt.%
MCM-41	PEI	75	100% CO2	75	3.02	[28]
SBA-15	PEI	50	15% CO2	75	3.18	[53]
Carbon black	PEI	50	100% CO2	75	3.07	[54]
SBA-15	PEI	50	100% CO2	75	2.89	[55]
KIT-6	PEI	50	100% CO2	75	3.07	[55]
KIT-6	PEI	50	100% CO2	105	3.10	[56]
SBA-15	TEPA	70	100% CO2	75	3.93	[57]
HMS	PEI	60	100% CO2	75	4.18	[58]
AC	DETA	39	100% CO2	25	0.91	[59]
Al2O3	DETA	40	100% CO2	25	1.41	[60]
SiO2	APTES	70	10% CO2	100	2.03	[61]
PMMA	PEI	40	15% CO2	45	3.65	[62]
SBA-15	PEI	60	15% CO2	75	3.14	[63]
MMSV	PEI	60	100% CO2	90	4.73	[64]
MSU-J	TEPA	50	100% CO2	25	3.73	[50]
MgO	—	—	40% CO2	30	0.95	This study
MgO	TEPA	40	40% CO2	30	4.98	This study