Recycling is the retrieval, reclamation, reprocessing or refining process of waste to produce new products. Recycling has always been a top priority in waste management since it enables us not only to maintain the health of the environment, but also to reuse garbage profitably. Many techniques are utilised to transform plastic waste into articles that are not present in virgin plastic with distinctive features. Polymers undergo molecular and structural changes in this process leading to simpler basic materials with superior thermal properties than original plastics. While gasification and pyrolysis processes break plastics down, fluid and semi-liquid products are also generated. © 2021 Elsevier B.V., All rights reserved.