Staged pyrolysis of biomass to probe the evolution of fractions of bio-oil

Chao Li, Yuannian Li, Yuchen Jiang, Lijun Zhang, Shu Zhang, Kuan Ding, Bin Li, Shuang Wang and Xun Hu

Energy, 2023, vol. 263, issue PD

Abstract: Bio-oil is a complex mixture of organics and each group of chemicals has a varied response to pyrolysis temperatures. This was investigated via the staged pyrolysis of poplar sawdust, cellulose, and lignin by consecutively increasing temperature to 250, 350, 450, and 550 °C, respectively. The results showed that 350 °C was the boundary temperature for formation of majority of organics from sawdust and cellulose and more than half of organics from lignin. The further increase of temperature to 550 °C mainly promoted the aromatization of reaction intermediates from aliphatic components. The staged pyrolysis also facilitated the charring reactions, generating the bio-oil with more light organics including anhydrate sugars, ketones, aldehydes, and phenolics. The enhanced charring reactions promoted the carbonization reactions via deoxygenation, making biochar carbon-rich and thermally more stable. Additionally, the staged pyrolysis also impacted the morphologies and evolution of the functionalities of biochar via influencing the volatile-char interactions.

Keywords: Staged pyrolysis; Sawdust, cellulose and lignin; Evolution of the organics; Bio-oil; Biochar (search for similar items in EconPapers)
Date: 2023
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (3)

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Persistent link: https://EconPapers.repec.org/RePEc:eee:energy:v:263:y:2023:i:pd:s0360544222027591

DOI: 10.1016/j.energy.2022.125873

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