Flash Pyrolysis of Waste Tires in an Entrained Flow Reactor-An Experimental Study

Area of Science:

• Chemical Engineering
• Materials Science
• Environmental Science

Background:

• Waste tires pose a significant environmental challenge due to disposal difficulties.
• Pyrolysis offers a promising route for converting waste tires into valuable products.
• Efficient and stable pyrolysis processes are needed for effective waste tire recycling.

Purpose of the Study:

• To develop and evaluate a flash pyrolysis process using an entrained flow reactor for waste tire recycling.
• To assess the process stability, reproducibility, and influence of feedstock (passenger car tire and truck tire granulates) on product yield and properties.
• To analyze pyrolytic products (pyrolytic carbon black, oil, pyro-gas), discuss their applications, and perform mass and energy balance analysis.

Main Methods:

• Development of a continuous flash pyrolysis system utilizing an entrained flow reactor.
• Testing process stability and reproducibility under consistent operating conditions.
• Analysis of pyrolytic carbon black (pCB), oil, and pyro-gas yields and properties from passenger car tire (PCT) and truck tire (TT) feedstock.
• Mass and energy balance calculations for the developed process.

Main Results:

• The flash pyrolysis process demonstrated stability and reproducibility for waste tire recycling.
• Feedstock type (PCT vs. TT) influenced the yield and characteristics of pyrolytic products.
• Characterization of pyrolytic carbon black, oil, and pyro-gas was performed, with potential applications discussed.
• Mass and energy balance analysis provided insights into process efficiency.

Conclusions:

• The developed flash pyrolysis process is a viable method for waste tire recycling, yielding valuable products.
• Understanding feedstock influence is crucial for optimizing product distribution and properties.
• The study provides foundational data for process optimization and scaling up waste tire pyrolysis.