Table 3.
Operative conditions and efficiency for SO2-removal over various catalysts and photocatalysts.
| Catalysts | NTP Technology | Operative Conditions | SO2 Conversion (%) | Ref. |
|---|---|---|---|---|
| MnCu/TiO2 | DBD–WESP | 8 kHz, 10 kV and 200 W SED = 280 J L−1 SO2: 1000 or 20,000 mg·m−3 NO: 200 mg·m−3 10% O2 and N2 balancing Reacting flow rate: 4 L min−1 Cleaning water flow rate: 3.6 L min−1 1 atm, 25 °C |
100 | [48] |
| MnCu/TiO2 | DBD–WESP | 8 kHz, 10 kV and 200 W SED = 280 J L−1 SO2: 20,000 mg m−3 NO: 400 mg m−3 10% O2 and N2 balancing Reacting flow rate: 4 L min−1 Cleaning water flow rate: 3.6 L min−1 1 atm, 25 °C |
77 | [48] |
| Al2O3 | DBD | 10 W DBD plasma 1% SO2, 4% H2, N2 balance, flow rate = 100 mL min−1 at 150 °C, 1 atm |
17 | [51] |
| FeS/Al2O3 | DBD | 10 W DBD plasma 1% SO2, 4% H2, N2 balance, flow rate = 100 mL min−1 at 150 °C, 1 atm |
31 | [51] |
| ZnS/ Al2O3 | DBD | 10 W DBD plasma 1% SO2, 4% H2, N2 balance, flow rate = 100 mL min−1 at 150 °C, 1 atm |
28 | [51] |
| Al2O3 | DBD | 10 W DBD plasma 1% SO2, 4% CH4, N2 balance, flow rate = 100 mL min−1 at 150 °C, 1 atm |
27 | [51] |
| FeS/Al2O3 | DBD | 10 W DBD plasma 1% SO2, 4% CH4, N2 balance, flow rate = 100 mL min−1 at 150 °C, 1 atm |
34 | [51] |
| ZnS/Al2O3 | DBD | 10 W DBD plasma 1% SO2, 4% CH4, N2 balance, flow rate = 100 mL min−1 at 150 °C, 1 atm |
35 | [51] |
| TiO2 | DBD | 900 Hz, 7 kV, residence time = 1 s SO2 = 100 ppm, H2O = 4%, SO2/NH3 = 2 21% O2 and N2 balancing 1 atm, 25 °C |
100 | [52] |
| TiO2 | DBD | 900 Hz, 7 kV, residence time = 1 s SO2 = 600 ppm, H2O = 4%, SO2/NH3 = 2 21% O2 and N2 balancing 1 atm, 25 °C |
16 | [52] |
| TiO2 | DBD | 900 Hz, 9 kV, residence time = 1 s SO2 = 400 ppm, H2O = 4%, SO2/NH3 = 2 21% O2 and N2 balancing 1 atm, 25 °C |
77 | [52] |
| TiO2 | DBD | 100 Hz, 9 kV, residence time = 1 s SO2 = 400 ppm, H2O = 4%, SO2/NH3 = 2 21% O2 and N2 balancing 1 atm, 25 °C |
9 | [52] |
| TiO2 | DBD | 900 Hz, 9 kV, residence time = 1 s SO2 = 400 ppm, H2O = 4%, SO2/NH3 = 2 21% O2 and N2 balancing 1 atm, 25 °C |
55 | [52] |
| TiO2 | DBD | 900 Hz, 9 kV, residence time = 0.32 s SO2 = 400 ppm, H2O = 4%, SO2/NH3 = 2 21% O2 and N2 balancing 1 atm, 25 °C |
18 | [52] |
| TiO2 deposited via dip-coating | DBD | 900 Hz, 9 kV, residence time = 1 s SO2 = 420 ppm 21% O2 and N2 balancing 1 atm, 25 °C |
45 | [53] |
| TiO2 deposited via PCVD (layer thickness 150 nm) | DBD | 900 Hz, 9 kV, residence time = 1 s SO2 = 420 ppm 21% O2 and N2 balancing 1 atm, 25 °C |
68 | [53] |
| TiO2 deposited via PCVD (layer thickness 35 nm) | DBD | 900 Hz, 11 kV, residence time = 1 s SO2 = 260 ppm 21% O2 and N2 balancing 1 atm, 25 °C |
15 | [54] |
| TiO2 deposited via PCVD (layer thickness 600 nm) | DBD | 900 Hz, 11 kV, residence time = 1 s SO2 = 260 ppm 21% O2 and N2 balancing 1 atm, 25 °C |
100 | [54] |
| Zeolite without TiO2 coating | DBD | 900 Hz, 12 kV, residence time = 1 s SO2 = 200 ppm 21% O2 and N2 balancing 1, 25 °C |
31 | [55] |
| Zeolite with TiO2 coating | DBD | 900 Hz, 12 kV, residence time = 1 s SO2 = 200 ppm 21% O2 and N2 balancing 1 atm, 25 °C |
58 | [55] |
| γ-Al2O3 | DBD | 7 W DBD Plasma NO = 440 ppm, NO2 = 14 ppm, SO2 = 460 ppm 21% O2 and N2 balancing Reacting flow rate: 600 mL min−1 |
24 | [56] |
| TiO2 | PCP | 12.5 kV SO2: 906 ppm (N2 basis); O2: 2.1%; H2O: 0.18%; H2O2: 0.055% Reacting flow rate: 1 L min−1 1 atm, 25 °C |
42 | [44] |