Activity of HZSM-5 and Zn/HZSM-5 catalysts for the methanol promoted naphtha catalytic pyrolysis system with different Zn contents.
| Sample | Methanol conversion (wt%) | Naphtha conversion (wt%) | Yield (wt%) | |||
|---|---|---|---|---|---|---|
| CH4 | C2H4 | C3H6 | C4H8a | |||
| HZSM-5 | >99 | 76.8 | 5.2 | 15.5 | 23.6 | 9.4 |
| 0.1-Zn/HZSM-5 | >99 | 80.4 | 6.6 | 18.1 | 26.1 | 8.2 |
| 0.3-Zn/HZSM-5 | >99 | 92.1 | 7.9 | 23.4 | 28.3 | 7.4 |
| 0.5-Zn/HZSM-5 | >99 | 91.3 | 7.1 | 24.1 | 26.3 | 7.8 |
a
Butene (C4H8) was mainly 1-butene and 2-butene (including trans-2-butene and cis-2-butene). Reaction conditions: reaction temperature = 650 °C, WHSV = 3.83 h−1, N2 = 60 mL min−1, methanol/naphtha = 15 wt%, time on stream = 3 h.