The influence of pyrolysis temperature on the chemical composition and the energy properties of char from tetrapak

The chemical composition of char obtained from tetrapak cardboard was monitored in dependence on pyrolysis temperature ranging from 400 to 700 °C together with its influence on energy parameters (calorific value). The highest calorific value 27–28 MJ/kg was determined for char obtained at a temperature of 400 °C, which is caused by the highest content of hydrocarbons (alkanes and alkines) and the lowest content of undifferentiated organic matter. The highest homogeneity of chemical composition of char was found for the temperature of 600 °C.