BIOMASS PYROLYSIS CHARACTERISTICS AND ANALYSIS OF MATERIAL FLOW AND ENERGY FLOW UNDER DIFFERENT TEMPERATURE

Tang Songbiao; Zhou Weihong; Yang Gaixiu

doi:10.19912/j.0254-0096.tynxb.2022-0454

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Acta Energiae Solaris Sinica ›› 2023, Vol. 44 ›› Issue (7) : 511-519. DOI: 10.19912/j.0254-0096.tynxb.2022-0454

BIOMASS PYROLYSIS CHARACTERISTICS AND ANALYSIS OF MATERIAL FLOW AND ENERGY FLOW UNDER DIFFERENT TEMPERATURE

Tang Songbiao^1,2, Zhou Weihong², Yang Gaixiu¹

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Abstract

Firstly, the distribution and physicochemical properties of the three-phase products for lignocellulose biomass （energy grass） at different pyrolysis temperatures （500, 600, 700 and 800 ℃） are studied. Besides, the mathematical models were used to further investigate the mass flow, element flow and energy flow throughout the pyrolysis process at different pyrolysis temperatures. The results revealed that as the temperature increased the yields of biochar and bio-oil decreased, while, the relative crystallinity and degree of graphitization for biochar increase, and the yields of pyrolysis gas increase gradually. The flowing proportion of C and N elements into the gas products increases with the increase of temperature, where the maximum flowing proportion of C and N elements into pyrolysis gas are 51.22% and 34.05% at 800 ℃, respectively. Correspondingly, the energy distribution of pyrolysis gas increased significantly （from 5.94% to 41.69%）. The total energy recovery efficiency is more than 70% for the whole pyrolysis process. The output energy of pyrolysis gas can fully meet the input energy required in the pyrolysis process at the temperature range of 600-800 ℃.

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biomass / pyrolysis / material flow / energy flow / temperature field

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Tang Songbiao, Zhou Weihong, Yang Gaixiu. BIOMASS PYROLYSIS CHARACTERISTICS AND ANALYSIS OF MATERIAL FLOW AND ENERGY FLOW UNDER DIFFERENT TEMPERATURE[J]. Acta Energiae Solaris Sinica. 2023, 44(7): 511-519 https://doi.org/10.19912/j.0254-0096.tynxb.2022-0454

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