Table 1.
Texture/structure characterization and vanadium incorporation efficiency.
| Catalyst | STotal
1 (m2 g−1) |
Pore Diameter 2 (nm) |
Maximum on PSD Ads 3 (nm) |
Maxima on PSD Des 4 (nm) |
Smicro
5 (m2 g−1) |
VTotal
6 (cm3 g−1) |
Wall Thickness 7 (nm) |
|---|---|---|---|---|---|---|---|
| SBA-15 | 887 | 10.6 | 9.5 | 7.3 | 165 | 0.98 | 1.30 |
| TPS/SBA-15-1 | 531 | 10.6 | 9.4 | 7.5; 4.7 | 104 | 0.62 | 1.94 |
| TPS/SBA-15-5 | 594 | 10.6 | 9.5 | 7.3; 4.7 | 105 | 0.73 | 1.73 |
| TPS/SBA-15-10 | 573 | 10.6 | 8.5 | 6.5; 3.9 | 81 | 0.81 | 1.58 |
| TPS/SBA-15-15 | 579 | 10.6 | 9.4 | 7.3; 4.7 | 90 | 0.71 | 1.66 |
| TPS/SBA-15-20 | 578 | 10.6 | 9.4 | 7.3; 4.7 | 94 | 0.78 | 1.58 |
| Nb/SBA-15 | 410 | 9.6 | 8.3 | 6.5 | 33 | 0.62 | 1.88 |
| V/SBA-15 | 438 | 10.1 | 8.6 | 6.4 | 27 | 0.67 | 1.81 |
1 Total surface area as calculated using the BET method. 2 pore diameter—calculated using the DFT method. 3 PSD—pore size distribution, calculated from the adsorption branch of the isotherm (BJH-KJS method). 4 PSD—pore size distribution calculated from the desorption branch of the isotherm (BJH-KJS method). 5 Surface area of micropores—t-Plot method. 6 Total pore volume—BJH adsorption cumulative volume of pores. 7 Wall thickness (t)—t = a0 — w/1.05; a0 = 1.154700538 × d100; w = 1.212522325 × d100 × ((δ × V)/(1 + δ × V))0.5.