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Numerical simulation of waste tyres gasification.
Isam Janajreh1, Syed Shabbar Raza2
1Mechanical and Materials Engineering Department, Masdar Institute of Science and Technology, Abu Dhabi, United Arab Emirates ijanajreh@masdar.ac.ae.
Summary
Gasification of tyre crumbs converts waste into syngas with 50% efficiency. This thermochemical process, using equilibrium and reactive flow models, shows economic viability for tyre waste conversion.
Area of Science:
- Thermochemical conversion
- Waste-to-energy technologies
- Chemical engineering
Background:
- Gasification converts carbonaceous feedstock into syngas (CO and H2) at high temperatures (1000°C-1600°C).
- Pyrolysis is a lower-temperature alternative but less efficient for complex waste like tyres.
- Tyre gasification offers a promising route for waste valorization compared to pyrolysis.
Purpose of the Study:
- To investigate the effect of oxidising agent on tyre crumb gasification.
- To analyze syngas composition using two gasification modelling approaches.
- To assess the economic viability of tyre gasification.
Main Methods:
- Proximate and ultimate analysis of tyre samples.
- Equilibrium zero-dimensional gasification modelling.
- Reactive multi-dimensional flow gasification modelling.
Main Results:
- Both equilibrium and reactive flow models predict approximately 50% gasification efficiency.
- Devolatilisation is less sensitive to the equivalence ratio than char conversion.
- Tyre gasification demonstrates high efficiency and potential economic viability.
Conclusions:
- Gasification is an effective method for converting tyre waste into syngas.
- The investigated gasification system is deemed economically viable.
- Further optimization can enhance syngas yield and conversion efficiency.
