The pyrolysis temperature of rubber, specifically tires, ranges from approximately 450°C to 700°C.
At around 450°C, the primary product is a liquid mixture of hydrocarbons.
While at temperatures above 700°C, the primary product shifts to synthetic gas (syngas), a mixture of hydrogen and carbon monoxide.
The pyrolysis process of rubber involves several stages, starting with drying to remove moisture.
This is crucial for efficient pyrolysis and to prevent unwanted reactions.
The dried rubber is then subjected to high temperatures in the absence of oxygen.
This leads to the breakdown of the organic material into volatile gases, liquid products, and solid char.
The specific temperature range for pyrolysis of rubber (450°C to 700°C) is determined by the desired end products.
Lower temperatures favor the production of liquid hydrocarbons.
While higher temperatures promote the formation of syngas.
The heating rate and the nature of the feedstock (e.g., whole tires versus shredded tires) also significantly influence the reaction time, product yield, product quality, and energy requirements of the pyrolysis process.
For instance, whole tires contain fibers and steel, which can affect the efficiency and products of pyrolysis compared to shredded tires where most of the steel and sometimes most of the fiber have been removed.
Overall, the pyrolysis of rubber is a complex process that requires careful control of temperature and other process conditions to optimize the production of desired products.
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