Slow pyrolysis is a process that converts biomass into useful products like syngas, biochar, and oil. But what reactors are used for this process? Let's break it down.
4 Key Types of Reactors for Slow Pyrolysis
Drum Reactor
The drum reactor is a straightforward type of pyrolysis reactor. It consists of a drum-shaped vessel that is heated. This reactor uses a continuous-rotation mechanism to circulate heat internally. It's ideal for slow pyrolysis of biomass, producing gaseous byproducts like syngas and biochar.
Auger Reactor
The auger reactor uses screws to move and mix biomass. It's a popular choice for slow pyrolysis but can also be adapted for fast pyrolysis. The mechanical mixing of biomass with the heat carrier by screws is less intense than in fluidized beds, but it still achieves high heat transfer coefficients. One advantage is that no fluidizing gas is needed, simplifying the product recovery and gas cleaning process.
Rotary-Kiln Reactor
The rotary-kiln reactor is particularly effective for producing oil from biomass. It's suitable for slow pyrolysis operations and is classified based on its geometry. Factors that influence its efficiency include heat supply and speed of rotation.
Summary
In summary, the drum, auger, and rotary-kiln reactors are the main types used for slow pyrolysis operations. Each reactor has its own set of advantages and factors that affect its efficiency.
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