Characteristics evaluation of bio-char produced by pyrolysis from waste hazelnut shell at various temperatures
Chenxi Zhao, Xianli Liu, Aihui Chen, Juhui Chen, Wei Lv, Xiaogang Liu
Abstract
Pyrolysis experiments of hazelnut shells were conducted by tube furnace pyrolysis reactor at 400–1,000°C. The results indicated that the effect of pyrolysis temperature on yield and characteristics of bio-char was significant. With the deepening of carbonization, bio-char yields decreased, approximately 50 wt% of VM were released, and the concentration of FC increased by 47 wt%. The optimum for HHV (33.3 MJ/kg) and combustion reactivity was at 900°C and 700°C, respectively; the adsorption capacity of bio-char was optimal and was determined by BET surface area and iodine absorption value (respectively 197.3 m2/g and 595.4 mg/g) at 800°C. The results provided a strong support for bio-char application from discarded hazelnut shell pyrolysis.