Tarcísio Martins, Mirele Santana Sá, Miliana Gouveia da Silva, Wenes Ramos da Silva, Alberto Wisniewski
High Resolution Image Download MS PowerPoint Slide Given the large amount of green coconut husk (GCH) waste generated in Brazil and the environmental impacts of improper disposal, this study evaluated pyrolysis as a method for managing and adding value to residual GCH biomass by producing value-added products. GCH exhibited properties suitable for pyrolysis, including high volatile content, low ash content, and a higher heating value (HHV) of approximately 22 MJ kg –1 . Pyrolysis was carried out in a rotary kiln reactor operated at 400, 500, and 600 °C, yielding biochars (29–47 wt %) and bio-oils (6.6–11 wt %). Increasing the temperature intensified biomass thermal degradation, resulting in higher gas production (up to 31.4 wt %). The 400 °C biochar had a higher yield and greater organic functionalization, making it suitable as an adsorbent; the 600 °C biochar had a more aromatic and stable structure, making it promising for carbon sequestration; and the 500 °C biochar balanced functionalization and stability, broadening its application potential. The bio-oils had calorific values between 26 and 31 MJ kg –1 and moderate viscosity. The highest yield (∼11 wt %) and phenolic monomer content (∼50% by area) were obtained at 500 °C, highlighting the product’s potential for industrial use. The results indicate that pyrolysis at 500 °C is the most favorable condition for the energy and chemical utilization of green coconut biomass, providing a sustainable and viable route for producing value-added bioproducts.