| Title | Effects of cellulose contamination on polystyrene recycling to styrene monomer via microwave pyrolysis |
|---|---|
| ID_Doc | 24004 |
| Authors | Leclerc, P; Gosselin, M; Garcia, AC; Mostoufi, N; Doucet, J; Chaouki, J |
| Title | Effects of cellulose contamination on polystyrene recycling to styrene monomer via microwave pyrolysis |
| Year | 2024 |
| Published | |
| Abstract | The increasing population and by extension the plastic waste increasing rate requires innovative waste management mitigation solutions, especially for a challenging polymer such as polystyrene. However, the presence of a broad range of contaminants in its waste stream, cellulose-based contaminants being one of the most prevalent, hinders polystyrene recycling. Herein, a microwave co-pyrolysis of polystyrene and cellulose was carried out to recycle styrene as monomer and to investigate the synergy between both reactants at 500 degrees C. Polystyrene pyrolysis presented a high styrene yield of 0.355 g styrene/g polystyrene; while as the cellulose content increased, higher amounts of hydrogen are produced, leading to the hydrogenation of styrene into ethylbenzene and other styrenic derivatives such as 1,4-Diphenyl-2-butene and 1,3-Diphenyl-1-butene. A noticeable 29 % decrease in styrene yield was observed for an equal amount of polystyrene and cellulose. At the same conditions, the detrimental effect of the co-pyrolysis also involved the reduction of the oil yield, from 58.9 %, polystyrene pyrolysis, to 30.2%. The negative synergy between cellulose and polystyrene co-pyrolysis for the recycling of styrene monomer indicates that polystyrene waste streams must be handled thoroughly prior to being recycled. |
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