Automobile shredder residue gasification.

Area of Science:

• Chemical Engineering
• Environmental Science
• Waste Management

Background:

• Automobile Shredder Residue (ASR) is a complex waste stream with high organic content, presenting potential as a renewable energy source.
• Traditional ASR processing faces challenges with char and tar formation, complicating energy recovery.
• Efficiently converting ASR into usable energy requires advanced gasification techniques.

Purpose of the Study:

• To investigate the gasification of Automobile Shredder Residue (ASR) using a bench-scale, two-stage reactor.
• To develop and validate a predictive model for ASR gasification based on mass/energy balances and chemical equilibrium.
• To assess the industrial feasibility of ASR gasification, considering its variable composition.

Main Methods:

• Utilized a bench-scale, two-stage reactor for the gasification of ASR.
• Developed a predictive model incorporating mass and energy balances and chemical equilibrium principles.
• Compared model predictions of syngas composition (including sulfur and chlorine) with experimental gasification data.

Main Results:

• The two-stage reactor demonstrated efficient ASR gasification, minimizing problematic char and tar byproducts.
• The developed model accurately predicted experimental gasification data, including syngas composition.
• The model indicated that a blend of ASR and Refuse-Derived Fuel (RDF) is essential for the industrial viability of ASR gasification.

Conclusions:

• Two-stage reactor technology offers an effective method for ASR gasification, facilitating energy recovery.
• A validated model can reliably predict ASR gasification outcomes and inform process design.
• Industrial-scale ASR gasification is feasible, but requires co-feeding with RDF to manage compositional variability and ensure economic viability.