Vapor-phase reaction during co-pyrolysis of cellulose and lignin

doi:10.3969/j.issn.1000-1565.2022.03.008

Abstract

Abstract: Volatile reaction is inevitable in the process of biomass pyrolysis, which determines the products formation and distribution from biomass pyrolysis. Co-pyrolysis of cellulose and lignin and theoretical calculation were used to investigate the interaction between cellulose and lignin during biomass pyrolysis, so as to provide an experimental basis for further understanding the pyrolysis behavior of biomass. Results showed: during the co-pyrolysis of cellulose and lignin, the distribution of various products is closely related to the ratio of cellulose and lignin, but the product distribution cannot be predicted by the weighted calculation. Co-pyrolysis of cellulose and lignin in arbitrary ratio inhibited the formation of CO, but promoted the formation of CO₂ and H₂O. Co-pyrolysis of cellulose and lignin promoted the formation of C₁—C₅ hydrocarbons, and inhibited the formation of most oxygen-containing compounds, and promoted the formation of phenol and alkyl phenol when the mixing mass ratio was 5∶5. When the ratio of cellulose and lignin was low, it can promote the formation of aromatic hydrocarbons, but when the ratio of cellulose and lignin was 7∶3, the formation of aromatic hydrocarbons was inhibited.

Key words: cellulose, lignin, co-pyrolysis, volatile reactions, light-products distribution

CLC Number:

YANG Huamei, JIANG Ju, LIU Wang, ZHANG Bingzhe, XU Panpan. Vapor-phase reaction during co-pyrolysis of cellulose and lignin[J]. Journal of Hebei University(Natural Science Edition), 2022, 42(3): 273-280.

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