Textural properties of biochars.
| BC400 | BC500 | BC600 | BC800 | |
|---|---|---|---|---|
| QSDFT average pore diameter (nm) | 1.096 | 0.614 | 1.007 | 0.614 |
| Surface area (m2 g−1) | 5.844 | 11.862 | 24.397 | 354.183 |
| Micropore surface area (m2 g−1) | 5.382 | 6.504 | 15.090 | 314.700 |
| Total pore volumea (cm3 g−1) | 0.0073 | 0.0163 | 0.0226 | 0.1654 |
| Micropore volumeb (cm3 g−1) | 0.002283 (0.0021) | 0.009812 (0.0065) | 0.01529 (0.0088) | 0.1583 (0.1278) |
| Mesopore volumec (cm3 g−1) | 0.000722 | 0.000266 | 0.00184 | 0.000174 |
| Proportion in total pore volumed (%) | ||||
| Micropore | 31.27 | 60.20 | 67.65 | 95.71 |
| Mesoporous | 9.89 | 1.63 | 8.14 | 0.11 |
| Macropore | 58.84 | 38.17 | 24.20 | 4.19 |
a
Note: total pore volume for pores with diameter less than 158.57 nm at P/P0 = 0.987882.
b
DR-method micropore volume and T-method micropore volume in parentheses.
c
Statistical QSDFT volume histogram with pore width of 2.05–50 nm.
d
The volume of micropores, mesopores and macropores mentioned above divided by the total pore volume, respectively.