Table 4 Yield, pH, pHpzc and textural properties of activated carbons.
TAC1 | TAC2 | TAC3 | TAC4 | TAC5 | TAC6 | |
---|---|---|---|---|---|---|
Yield | 21.3 | 41.3 | 49.9 | 73.1 | 59.7 | 52.8 |
pH | 7.30 | 6.90 | 4.90 | 5.80 | 5.30 | 7.20 |
pHpzc | 7.90 | 6.25 | 3.30 | 5.30 | 3.85 | 6.40 |
BET surface area (m2/g) | 190 | 907 | 1,445 | 344 | 498 | 394 |
Micropore surface area (m2/g) | 139 | 266 | 565 | 293 | 242 | 300 |
External surface area (m2/g) | 50.9 | 641 | 880 | 51.9 | 256 | 94.6 |
Langmuir surface area (m2/g) | 254 | 1,240 | 1976 | 455 | 669 | 524 |
Total pore volume (cm3/g) | 0.196 | 0.450 | 0.730 | 0.169 | 0.325 | 0.273 |
Micropore volume (cm3/g) | 0.065 | 0.111 | 0.237 | 0.136 | 0.110 | 0.139 |
Mesopore volume (cm3/g) | 0.132 | 0.339 | 0.493 | 0.033 | 0.215 | 0.134 |
Mesoporosity (%) | 67.3 | 75.3 | 67.5 | 19.5 | 66.2 | 49.1 |
Average pore size (nm) | 4.13 | 1.98 | 2.02 | 1.96 | 2.61 | 2.77 |