Mixtures of rubber tyre and plastic wastes pyrolysis: A kinetic study
| Autor: | Miguel Miranda, I. Gulyurtlu, Isabel Cabrita, Filomena Pinto |
|---|---|
| Rok vydání: | 2013 |
| Předmět: |
Polypropylene
Arrhenius equation Reaction mechanism Materials science Mechanical Engineering Building and Construction Polyethylene Pollution Industrial and Manufacturing Engineering chemistry.chemical_compound symbols.namesake General Energy Reaction rate constant chemistry Natural rubber Chemical engineering visual_art visual_art.visual_art_medium symbols Organic chemistry Polystyrene Electrical and Electronic Engineering Pyrolysis Civil and Structural Engineering |
| Zdroj: | Energy. 58:270-282 |
| ISSN: | 0360-5442 |
| DOI: | 10.1016/j.energy.2013.06.033 |
| Popis: | The study performed aimed at analysing possible routes for pyrolysis reaction mechanisms of polymeric materials namely RT (rubber tyre) and plastic wastes (PE (polyethylene), PP (polypropylene) and PS (polystyrene)). Consequently, and seeking sustainable transformation of waste streams into valuable chemicals and renewable liquid fuels, mixture of 30% RT, 20% PE, 30% PP and 20% PS was subjected to pyrolysis. Different kinetic models were studied using experimental data. None of the mechanisms found in literature led to a numerical adjustment and different pathways were investigated. Kinetic studies were performed aiming to evaluate direct conversions into new solid, liquid and gaseous products and if parallel reactions and/or reversible elementary steps should be included. Experiments were performed in batch system at different temperatures and reaction times. Kinetic models were evaluated and reaction pathways were proposed. Models reasonably fit experimental data, allow explaining wastes thermal degradation. Kinetic parameters were estimated for all temperatures and dependence of Ea and pre-exponential factor on temperature was evaluated. The rate constant of some reactions exhibited nonlinear temperature dependence on the logarithmic form of Arrhenius law. This fact strongly suggests that temperature has a significant effect on reaction mechanism of pyrolysis of mixtures of rubber tyre and plastic wastes. |
| Databáze: | OpenAIRE |
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