Synthesis of Magnesium Oxide Nanoplates and Their Application in Nitrogen Dioxide and Sulfur Dioxide Adsorption

Table 2

NO₂ and SO₂ adsorption capacity of MgO nanoplates compares with well-known adsorbents.

Adsorbent	Experimental condition	Adsorption time (min)	Saturated adsorption capacity (mg/g)		Reference
			NO2	SO2
Porous media prepared from sewage sludge (SBET = 21.2 m^2/g)	(i) Concentration: NO2: 70 ppm (0.007%) in nitrogen; SO2: 100 ppm (0.01%) in nitrogen; (ii) Moisture: 0%; (iii) Adsorbent weight: 0.55 g; (iv) Gas flow rate: 17000 ml/min; (v) Temperature: 25°C	70 (NO2); 100 (SO2)	1.12 (0.0244 mmol/g)	0.98 (0.0214 mmol/g)	[36]
Zeolite-coated porous media (SBET = 13.1 m^2/g)		40 (NO2); 65 (SO2)	2.08 (0.0451 mmol/g)	1.72 (0.0374 mmol/g)	[36]
Activated carbon (SBET = 1077 m^2/g)	(i) Concentration: NO2: 4856 ppm (0.4856%) in nitrogen; SO2: 1170 ppm (0.1170%) in nitrogen (relative pressure: 2.47); (ii) Moisture: 0%; (iii) Adsorbent weight: 1.5 g; (iv) Gas flow rate: 583 ml/min; (v) Temperature: 30°C	60	135.70 (2.95 mmol/g)	42.10 (2.73 wt.%)	[37]
MgO nanoplates (SBET = 126 m^2/g)	(i) Concentration: 5% in nitrogen; (ii) Moisture: 0%; (iii) Adsorbent weight: 0.1 g; (iv) Gas flow rate: 50 ml/min; (v) Temperature: 25°C	180	174.00	160.00	This research