**5. Conclusions**

Chemical recycling of polyethylene and polypropylene gained much attention over the last years due to the rising plastic waste issue. Many projects of demonstration or commercial facilities are currently being developed. Although the definition of chemical recycling is inconsistent worldwide, four main types of products can be identified: intermediates for further chemical processing, fuels and fuel components, monomers and final chemical products. Pyrolysis and gasification are processes that can be used for polyolefins providing mainly open-loop recycling solutions. These technologies require deep feasibility and environmental impact analyses due to their complexity, different values of products, need for co-processing with fossil-based feedstock or high capital cost. Nevertheless, intensive growth of plastic waste volumes is an opportunity for these technologies to be further developed, optimised and commercially used.
