Study on transformation and enrichment behavior of selenium in particulate matter in combustion flame

Figures & data

Figure 1. Experimental system schematic. 1. Nitrogen gas; 2. Ethylene; 3.Air; 4.Sulfur dioxide; 5.Selenium solution; 6.Micro peristaltic pump; 7.Rotor flow meter; 8.Quartz U-tube; 9. Thermostatic oil bath 10. IDF burner; 11.Air flow uniformplate; 12.Exhaust filter; 13.Quartz fiber filter; 14. Two-dimensional lift platform; 15.1 Absorption bottle (empty); 16.2 Absorption bottle (5% HNO3 + 10% H2O2); 17.3 Absorption bottle (silicone); 18.Ice bath; 19.Vacuum pump.

Figure 2. Release law of particulate matter under different A/F ratios.

Table 1. The release of particulate selenium and gaseous selenium in different A/F ratios.

A/F	HAB (mm)	Concentration of Se(P),	Concentration of Se(G),
		μg/m^3	μg/m^3
0.6	12	1.61	4.82
	22	0.00	4.58
	32	0.00	0.46
	42	0.95	0.00
0.8	12	6.07	2.45
	22	1.94	2.60
	32	0.46	2.02
	42	0.41	0.88
1.0	12	3.84	12.08
	22	2.15	4.14
	32	0.96	3.13
	42	2.28	0

Figure 3. Changes of particulate selenium concentration in different A/F ratios.

Figure 4. The concentration of selenium under different A/F ratios.

Figure 5. The relationship between the distribution of selenium and the flame temperature for the A/F ratio of 0.6.

Figure 6. Release law of particulate matter under different sulfur dioxide concentrations.

Figure 7. (a) Concentration of particulate selenium under different sulfur dioxide concentrations. (b) Concentration of gaseous selenium under different sulfur dioxide concentrations. (c) Concentration of total selenium under different sulfur dioxide concentrations.