The role of acidic, alkaline and hydrothermal pretreatment on pyrolysis of wild mustard (Sinapis arvensis) on the properties of bio-oil and bio-char

In this study, the biomass (Sinapis arvensis) was pretreated with acidic (H2SO4, HCI), alkaline (NaOH, KOH) and high temperature water (HTW) after this samples pyrolyzed at 350, 450 and 550 °C. GC–MS, FT-IR, Elemental, 1H NMR and SEM analysis methods were used in the characterization of the products obtained at the end of the pyrolysis process. It has been determined that alkaline and acidic pretreatment increase the liquid product yield and also support the formation of high energy value biochar. According to the liquid product content obtained as a result of pyrolysis, HTW and alkaline pretreatments are more effective in the formation of mono aromatics, and acidic pretreatments are more effective in the production of aliphatic. [Display omitted] •The highest liquid product yields were obtained as a result of acidic and alkaline pretreatments.•HTW and alkaline pretreatments are more effective in the formation of monoaromatics.•Acidic pretreatments are more efficient in the production of aliphatics.