| Pyrolysis methods | The main reaction conditions | The liquid products (TAR) | Gas products (CH4, CO, H2) | Firm product (biochar) |
| Slow method | Not rising temperature (400˚C - 660˚C), not rising heating rate (0.1 - 1˚C/S), Gas or vapor residence time(5 - 30 min) | 30% and 70% Wood vinegar | 35% | 35% |
| Medium speed pyrolysis | Not rising temperature(400˚C - 550˚C), Modest heating rate (10 - 200˚C/S), Gas or vapor residence time(10 - 20 S) | 50% and 50% Wood vinegar | 25% | 25% |
| Fast pyrolysis | Middle temperature (about 500˚C), Fast heating rate (1000˚C/S) Vapor residence time (<2 S) | 75% and 25% Wood vinegar | 13% | 12% |
| Flash pyrolysis | High temperature (>800˚C), Fast heating rate 1000˚C/S, gas vapor residence time (<1S) | 5% and 55% Wood vinegar
|
About 80% |
About 10% |