Inhibitory and synergistic effects on thermal behaviour and char characteristics during the co-pyrolysis of biomass and single-use plastics
| Autor: | Biswajit Samal, Subhash Chandra, Kumar Raja Vanapalli, Jayanta Bhattacharya, Isha Medha, Brajesh Dubey |
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| Rok vydání: | 2021 |
| Předmět: |
Thermogravimetric analysis
Chemistry 020209 energy Mechanical Engineering Biomass 02 engineering and technology Building and Construction Polyethylene Pollution Industrial and Manufacturing Engineering chemistry.chemical_compound General Energy 020401 chemical engineering Chemical engineering Biochar 0202 electrical engineering electronic engineering information engineering Cation-exchange capacity Degradation (geology) Char Polystyrene 0204 chemical engineering Electrical and Electronic Engineering Civil and Structural Engineering |
| Zdroj: | Energy. 235:121369 |
| ISSN: | 0360-5442 |
| Popis: | The co-pyrolytic behaviour of single-use plastics (Polystyrene, Low-density polyethylene) and Eucalyptus biomass was investigated at variable temperatures (300, 400, 500, and 600 °C) and the effects of their interactions on the characteristics of solid chars were also studied. The variation in thermal profiles of ‘Δ Mass loss%’ showed the inhibitory and synergistic effects of plastics on the biomass degradation, resulting in higher and lower yields of char composite, respectively. The blend containing polystyrene exhibited the highest synergistic (Δ M ≈ 15.1) and inhibitory (Δ M ≈ - 4) effects. The thermal kinetics of blends also indicated the presence of both the effects through relatively higher and lower apparent activation energies compared to the calculated, before and during the degradation of plastics. Despite low fixed carbon contents and high volatile matter, polymer-coated char composites had higher fuel value indices (36–136%), energy yields (1–26%) and calorific values (15–21%), relative to biochar. After the complete degradation of plastics, char composites exhibited higher values of electrical conductivity (2–40%), surface area (15–64%), and cation exchange capacity (5–19%). These properties advocate the flexibility of char composites' applicability as solid fuel or soil amender depending on the optimized conditions of co-pyrolysis. |
| Databáze: | OpenAIRE |
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