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TGA data indicated that the process of decalcification impacted the activation energy of polystyrene decomposition, causing it to rise in the temperature range of 200-350°C and to fall in the 350-600°C range. Contrary to other pyrolysis processes, the use of CaCO3 lowered the activation energy (E) for phase 2 (PH2) of the pseudoreaction and affec


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