Chemical reactions during tire pyrolysis

 

 

Cracking is one of the most important chemical reactions in the tire pyrolysis process. It refers to the use of high temperature to crack the high molecular polymers in waste tires under oxygen-free or oxygen-deficient conditions and decompose them into low molecular compounds such as hydrocarbons and gases. This reaction is usually carried out in a high-temperature furnace, and the high temperature can destroy the polymer chain and decompose it into small molecules. The products of the cracking reaction are mainly liquid fuels (such as tire oil) and gases (such as hydrogen, methane, carbon monoxide, carbon dioxide, etc.), which can be further used in energy production or chemical processes.

 

 

During the cracking process, the hydrocarbon compounds produced can be recombined into more valuable chemicals through recombination reactions. These chemicals can be used to produce plastics, rubber and other chemical products. The selectivity and efficiency of the recombination reaction depend on the composition of the cracking products and the reaction conditions. Therefore, optimizing the recombination reaction conditions is the key to improving refining efficiency and product quality.

 

 

Gasification is the process of converting solid or liquid fuels into gaseous fuels. In the tire cracking process, the gasification reaction is to heat the tire cracking products to a high temperature and react with oxygen or steam to generate gaseous fuels such as hydrogen and carbon monoxide. The gasification reaction can control the composition and yield of the products by adjusting the reaction temperature and pressure.

 

 

The chemical reaction efficiency and product selectivity in the tire cracking process are affected by many factors:

a. Reaction temperature: Higher temperature can accelerate the reaction rate, but it may also cause product degradation and incomplete reaction. Therefore, choosing a suitable reaction temperature is the key to ensuring high yield and product quality.

b. Reaction pressure: Higher pressure can improve product selectivity, but it will also increase the energy consumption and equipment cost of the reaction.

c. Catalyst: The selection and use of catalysts are also important factors affecting reaction efficiency and product quality. Suitable catalysts can reduce the reaction activation energy, accelerate the reaction rate, and improve product selectivity.

 

In summary, the chemical reactions in the tire cracking process include cracking, recombination, and gasification steps. The principles and influencing factors of these chemical reactions are crucial to improving refining efficiency and product quality. By optimizing the reaction conditions and the selection of catalysts, we can convert waste tires into useful fuels and chemical products, achieving resource recycling and sustainable development.