2.3. Pyrolysis
A reactor with a three-furnace chamber (Linberg Blue, Asheville, USA) was utilized to pyrolyse approximately 30 g of sample. The furnace was heated to 500 °C and purged with nitrogen. Ice and salt were placed into two 1000-mL beakers and impingers were placed in the beaker connected by a rubber tube to collect pyrolysis gas and condense it into liquid. The samples remained in the reactor for 20 min. An oven tube (Linberg Blue, Asheville, USA) was used to control the temperature inside the three-furnace chambers. Oil collected in the impringer was dissolved in 2 mL of ethyl acetate and the color of the solution was recorded. The ash in the reactor was collected and weighed.