Abstract
The amount of plastic waste is growing every year and with that comes an environmental concern regarding this problem. Pyrolysis as a tertiary recycling process is presented as a solution. Pyrolysis can be thermal or catalytical and can be performed under different experimental conditions. These conditions affect the type and amount of product obtained. With the pyrolysis process, products can be obtained with high added value, such as fuel oils and feedstock for new products. Zeolites can be used as catalysts in catalytic pyrolysis and influence the final products obtained.
Highlights
Plastics are materials that offer a fundamental contribution to our society, due to its versatility and relatively low cost
The plastic waste are bulkier than other organic residues and occupy massive space in landfills and the proper disposal and incineration have high costs
The plastic waste is processed to produce basic petrochemical compounds, which can be used as raw material for new plastics
Summary
Plastics are materials that offer a fundamental contribution to our society, due to its versatility and relatively low cost. The plastic waste are bulkier than other organic residues and occupy massive space in landfills and the proper disposal and incineration have high costs Incineration of these waste plastics results in environmental problems due to increased emission of harmful compounds[2,6,7,8]. The plastics recycling methods, in accordance with ASTM D5033-00, are divided into four types according to the final result, one of them being the tertiary or chemical recycling In this type of recycling chemical degradation leads to production of liquid fuels and chemicals with high added value from waste plastic fragments or segregated[2,8,13,14]. PET and other special polymers should be removed from municipal waste by mechanical recovery, which is economically viable
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