Table 2.
Product distributions in the thermal pyrolysis of plastics.
| Yield of product (%) | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Feedstock | Reactor | T (oC) | Residence time or Feed rate | Pressure | Oil | Wax | Gas | Residue | Ref. |
| HDPE | Fixed bed reactor | 550 | — | — | 70 (oil + wax) | — | 22 | 7 | [26] |
| PP | Fixed bed reactor | 525 | — | Atmospheric | 76.4 | 4.2 | 10.1 | 2.6 | [27] |
| PP | Fixed bed reactor | 525 | — | Vacuum | 70.8 | 20.5 | 5.1 | 2.4 | [27] |
| HDPE:LDPE:PP = 25:35:40 | Fixed bed reactor | 500 | 60 min | — | 30.7 (oil + wax) | — | 67.9 | 1.4 | [28] |
| PE | Fluidized bed reactor | 500–600 | 12.4–20.4 s | — | 81.2–28.5 | — | 8.2–56.8 | 10.6–14.7 | [29] |
| HDPE | Fluidized bed reactor | 640–850 | 3–4 g·min−1 | — | 68.5–16.2 | — | 33.5–89.1 | — | [30] |
| PP | Fluidized bed reactor | 510 | 14 g·min−1 | — | 10.5 | 86.6 | 2.7 | 0.17 | [31] |
| PE | Fluidized bed reactor | 510 | 16 g·min−1 | — | 30.1 | 63.1 | 6.5 | 0.26 | [31] |
| Mixed municipal plastic wastes | Screw kiln reactor | 500 | 5 g·min−1 | — | 5.5 | 93.2 | 1.3 | — | [32] |
| PP | Screw kiln reactor | 500–700 | 10 min | — | 50–20 | — | 6–80 | — | [33] |
| LDPE | Screw kiln reactor | 500–550 | 1.5 g·min−1 | — | 84.6–79.3 | 14.4–13.6 | 1.0–7.1 | — | [34] |
| HDPE | Conical spouted bed reactor | 500–700 | 1 g·min−1 | — | 31.4–49.3 | 67–11.3 | 1.6–39.4 | — | [35] |
| PE | Conical spouted bed reactor | 450–600 | 1 g·min−1 | — | 20–49 (oil + gas) | 80–51 | — | — | [36] |
| PP | Conical spouted bed reactor | 450–600 | 1 g·min−1 | — | 8–50 (oil + gas) | 92–50 | — | — | [36] |
| HDPE | Microwave reactor | 500 | — | — | 74.7 (oil + wax) | — | 13.3 | 12.0 | [37] |
| PP | Microwave reactor | 600 | — | — | 83.9 (oil + wax) | — | 15.7 | 0.4 | [37] |
| HDPE | Molten salt pyrolysis reactor | 408–423 | — | — | 94–92 (oil + wax) | — | 6∼8 | — | [38] |
| PP | Molten salt pyrolysis reactor | 362–417 | — | — | 98–96 (oil + wax) | — | 2∼3 | — | [38] |
| LDPE | Induced plasma reactor | 550 | 30 min | — | 56.9 | — | 37.8 | 5.3 | [39] |
| LDPE | Screw extruder reactor + Coking reactor | 500 | 30 min | — | 93.8 (oil) | — | 5.1 | 1.1 | Sinopec |