Fast Pyrolysis
Fast pyrolysis is a process involving rapid thermochemical conversion of carbon-containing fuel/feed to the process; this process happens in the absence of oxygen and at temperatures around 500°C for biomass. Moderate reactor temperature and low pressure conditions are typically used for operation; start-up time is relatively much shorter than that of gasification. Products from this process are: biochar,pyrolysis oil, and non-condensable gases. Rapid cooling of pyrolysis vapors is usually required soon after biochar content has been effectively reduced. This type of pyrolysis system/process will usually include some type of feed preparation (which usually reduces particle size), particulate removal, and a pyrolysis oil collection system.
Flow Diagrams
(Source: http://www.pyne.co.uk/?_id=69)
(Source: http://www.ars.usda.gov/Main/docs.htm?docid=19898)
(Source: http://www.ars.usda.gov/sp2UserFiles/Program/307/biomasstoDiesel/RobertBrown&JenniferHolmgrenpresentationslides.pdf)
(Source: http://www.sciencedirect.com/science/article/pii/S1364032199000076)
(Source: http://www.ikft.kit.edu/english/181.php)
Equipment
Pre-treatment Separators Condensers Mill Hopper Combustor Quencher Electrostatic Precipitator Screw Feeder
Videos
Process of Pyrolysis
BTG's fast pyrolysis process
Economic Feasibility of a Mobile Fast Pyrolysis System for Sustainable Bio-crude
References
- http://www.youtube.com/watch?v=Ut3I7OIPFR8
- http://www.youtube.com/watch?v=XezrQuWKQxQ
- http://www.youtube.com/watch?v=ZV4DOhwrKnM
- http://www.pyne.co.uk/?_id=69
- http://www.avellobioenergy.com/en/technology/fast_pyrolysis/
- http://www.ars.usda.gov/Main/docs.htm?docid=19898
- http://www.sciencedirect.com/science/article/pii/S1364032199000076
- http://www.ikft.kit.edu/english/181.php
- http://www.sciencedirect.com/science/article/pii/S1364032199000076
- http://www.freepatentsonline.com/7202389.html