In this study, we investigated the acid (HCl) and alkali (KOH) chemical activation of açaí seeds (Euterpe Oleraceae, Mart.) pre-treatment before pyrolysis at temperatures 350–450 °C in order to assess how reactions proceed when affected by temperature. Chemical composition bio-oil aqueous phase were determined GC-MS FT-IR. The bio-char is characterized XRD. For with KOH, XRD analysis identified...