Biomass-based pyrolytic polygeneration system on cotton stalk pyrolysis: Influence of temperature

► The optimum temperature of the polygeneration system was 550-750 °C. ► The calorific value of the gas reaches 8-9 MJ/m3 enough to cooking. ► The higher calorific value and surface area of charcoal was 28 MJ/kg and 200 m2/g. ► The pore distribution of charcoal may be associated with the fused aromatic rings. ► Acetic acid is the major component of liquid oil, but decomposes above 650 °C.