Vacuum pyrolysis is a versatile process with varying temperature ranges depending on the specific method used.
4 Key Processes in Vacuum Pyrolysis: Temperature Ranges Explained
Flash Pyrolysis
Flash pyrolysis requires an oxygen-free atmosphere in the reactor.
The temperature range typically falls between 475 and 550 °C (887 and 1022 °F).
This process occurs at rapid heating rates and moderate temperatures.
Fast Pyrolysis
Fast pyrolysis involves rapidly heating biomass.
Temperatures range from 650 to 1000 °C (1202 to 1832 °F).
This method is primarily used to produce bio-oil and gas.
Slow Pyrolysis (Torrefaction)
Slow pyrolysis, or torrefaction, is characterized by low temperatures and slow biomass heating rates.
Heating temperatures range from 0.1 to 2 °C (32.18 to 35.6 °F) per second.
Prevailing temperatures are around 500 °C (932 °F).
The residence time of gas may be over five seconds, and the residence time of biomass can range from minutes to days.
General Considerations
The temperature range in vacuum pyrolysis can vary depending on the specific process and desired outcomes.
It is crucial to maintain an oxygen-free atmosphere in the reactor to ensure the success of the pyrolysis reactions.
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