Table 1. Catalytic properties of different solid acids mixed with Pt/WO3/ZrO2 in LDPE hydroconversion.
Reaction conditions: 250°C, 30-bar H2, 2.0-g LDPE, 0.1-g Pt/WO3/ZrO2, 0.1-g solid acid, and reaction time of 2 hours [except for data in “*,” which was conducted for 12 hours)].
| Solid acid | Si/Al ratio |
Yield of
solid (%) |
Selectivity (%) |
Yield of
gasoline (C5–12) (%) |
Yield of
diesel (C9–22) (%) |
||||
| C1–4 | C5–7 | C8–12 | C13–16 | C>17 | |||||
| Zeolites | |||||||||
| HZSM-5 | 11.5 | 13 | 70 | 23 | 6 | 0 | 0 | 13 | 1 |
| HMOR | 10.0 | 20 | 21 | 42 | 31 | 5 | 2 | 32 | 12 |
| HBEA | 13 | 0 | 21 | 60 | 19 | 0 | 0 | 57 | 6 |
| HY(30) | 16 | 6 | 9 | 52 | 29 | 2 | 0 | 73 | 20 |
| Other solid acids | |||||||||
| Al-MCM-41 | 39.5 | 68 | 9 | 28 | 42 | 16 | 5 | 11 | 9 |
| WO3/ZrO2 | – | 31 | 5 | 21 | 40 | 19 | 15 | 23 | 23 |
| Al-MCM-41* | 40 | 3 | 6 | 28 | 39 | 15 | 11 | 57 | 45 |
| WO3/ZrO2* | – | 3 | 3 | 15 | 47 | 22 | 13 | 56 | 59 |