Production and characterization of slow pyrolysis biochar: influence of feedstock type and pyrolysis conditions

Abstract Biochar was produced by fixed‐bed slow pyrolysis from various feedstock biomasses under a range of process conditions. Feedstocks used were pine wood, wheat straw, green waste and dried algae. Process conditions varied were the highest treatment temperature ( HTT ) and residence time. The produced chars were characterized by proximate analysis, CHN ‐elemental analysis, pH in solution, bomb calorimetry for higher heating value, N 2 adsorption for BET surface area and two biological degradation assays (oxygen demand, carbon mineralization in soil). In proximate analysis, it was found that the fixed carbon content (expressed in wt % of dry and ash‐free biochar) in the biochar samples strongly depended on…

• EI
  Evonik Industries