Application of biomass pyrolytic polygeneration by a moving bed: Characteristics of products and energy efficiency analysis

• Published in: Bioresource technology Vol. 254; pp. 130 - 138
• Main Authors: Zhang, Xiong, Che, Qingfeng, Cui, Xiang, Wei, Zhiyu, Zhang, Xiaoyan, Chen, Yingquan, Wang, Xianhua, Chen, Hanping
• Format: Journal Article
• Language: English
• Published: England Elsevier Ltd 01.04.2018
• Subjects: Agricultural waste; Biomass; Bioreactors; Demonstration project; Heating; Hot Temperature; Pyrolytic polygeneration; Temperature; Pyrolytic polygeneration; Demonstration project; Biomass; Agricultural waste
• ISSN: 0960-8524; 1873-2976
• DOI: 10.1016/j.biortech.2018.01.083

[Display omitted] •Moving bed pyrolysis furnace can continuously deal with 7E+03 kg/h of biomass.•Torrefaction pretreatment improves the quality of tri-state products.•LHV of bio-gas and biochar are respectively 12.5 MJ/m3 and 30.5 MJ/kg.•Total energy efficiency of this pyrolytic polygeneration system reach 57.5%. In order to overcome the shortcoming of batch production in the retort and improve the quality of three-state products, a moving bed as pyrolysis furnace and torrefaction pretreatment were both used in a demonstration of biomass pyrolytic polygeneration. The bench and demonstration scale experiments were both investigated in this work. The results show that when the pyrolysis temperature between 550 °C and 750 °C, it can not only maintain the relative stability of the tri-state products yield, but also guarantee the quality. When the demonstration ran at this temperature, it can continuously deal with biomass for about 7E+03 kg/h, and reach 5.42E+07 kg/yr, which can be converted into 1.12E+07 Nm3 of bio-gas, 3.78E+06 kg of tar, 7.63E+06 kg of vinegar and 1.14E+07 kg of biochar. The lower heating value of bio-gas and biochar were respectively 12.5 MJ/m3 and 30.5 MJ/kg, which showed the great potential as gas and solid fuel.