Structural properties and chemical compositions of the HM, HM–M and their modified samples.
| Sample | Si/Ald | Mg content (%) | S BET a (m2 g−1) | S ext b (m2 g−1) | S micro b (m2 g−1) | V micro b (cm3 g−1) | V meso c (cm3 g−1) |
|---|---|---|---|---|---|---|---|
| HM | 12.8 | n. d. | 482 | 25 | 457 | 0.180 | 0.047 |
| 4% MgO/HM | n. d.e | 2.32 | 476 | 20 | 456 | 0.182 | 0.043 |
| 1% SiO2/HM | 13.5 | n. d. | 458 | 20 | 438 | 0.162 | 0.043 |
| HM–M | 13.1 | n. d. | 559 | 130 | 429 | 0.172 | 0.16 |
| 1% MgO/HM–M | n. d. | 0.62 | 549 | 121 | 428 | 0.171 | 0.10 |
| 1% SiO2/HM–M | 13.7 | n. d. | 532 | 117 | 415 | 0.174 | 0.10 |
a
Brunauer–Emmett–Teller (BET) method.
b
t-plot method.
c
Barrett–Joyner–Halenda (BJH) method (the adsorption branch).
d
Inductively coupled plasma-optical emission spectroscopy (ICP-OES) method.
e
n. d., not determined.