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5 Chapter 5Figure 5.1. Schematic illustration of preprocessing of polystyrene. For a color ...Figure 5.2. Shredded waste polystyrene with its recycling code 6. For a colorver...Figure 5.3. a) Raw SiO2-MgO and b) 950°C calcined silica-magnesium catalyst. For...Figure 5.4. Experimental setup of the pyrolysis process. (a – SS bench-scale pyr...Figure 5.5. Thermal degradation of polystyrene obtained from TGA analysis at 10°...Figure 5.6. Scanning of raw SiO2-MgO material with 5 μm magnificationsFigure 5.7. Scanning of 950°C calcinated silica-magnesium catalyst with 5 μm mag...Figure 5.8. EDS spectrum of raw SiO2-MgO. For a color version of this figure, se...Figure 5.9. EDS spectrum of 950°C calcinated silica-magnesium catalyst. For a co...Figure 5.10. Comparison plot between experimental and predicted data. For a colo...Figure 5.11. Surface plot interaction between C:F and temperature on yield respo...Figure 5.12. Surface plot interaction between C:F and time on yield response (Y)...Figure 5.13. Surface plot interaction between the temperature and the time on th...Figure 5.14. Contour plot interaction between the C:F ratio and the temperature ...Figure 5.15. Contour plot interaction between the C:F ratio and time on the yiel...Figure 5.16. Contour plot interaction between the temperature and time on the yi...Figure 5.17. FTIR analysis of silica-magnesium cracking of polystyrene. For a co...Figure 5.18. GC-MS analysis of silica-magnesium cracking of polystyrene. For a c...Figure 5.19. Effect of C:F ratio on silica-magnesium cracking of polystyrene. Fo...Figure 5.20. Effect of the temperature on silica-magnesium cracking of polystyre...Figure 5.21. Effect of time on silica-magnesium cracking of polystyrene. For a c...