纤维素/木质素共热解过程中的气相反应

doi:10.3969/j.issn.1000-1565.2022.03.008

河北大学学报(自然科学版) ›› 2022, Vol. 42 ›› Issue (3): 273-280.DOI: 10.3969/j.issn.1000-1565.2022.03.008

纤维素/木质素共热解过程中的气相反应

杨华美,蒋菊,刘望,张秉哲,徐盼盼

收稿日期:2021-09-16 出版日期:2022-05-25 发布日期:2022-06-16
作者简介:杨华美(1987—),女,江苏徐州人,徐州工程学院讲师,博士,主要从事生物质新能源的高效转化利用方向研究.
E-mail: yhmcumt@yeah.net
基金资助:
江苏省自然科学基金资助项目(BK20190156);徐州市应用基础研究计划项目(KC19048)

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

YANG Huamei, JIANG Ju, LIU Wang, ZHANG Bingzhe, XU Panpan

School of Materials and Chemical Engineering, Xuzhou University of Technology, Xuzhou 221018, China

Received:2021-09-16 Online:2022-05-25 Published:2022-06-16

摘要/Abstract

摘要： 气相反应在生物质热解过程中是不可避免的,决定着生物质热解产物的形成与分布.通过纤维素和木质素共热解实验和理论计算研究了生物质热解过程中纤维素和木质素间的相互作用,为进一步深入理解生物质热解行为提供实验基础.结果表明:纤维素和木质素进行共热解时,各类产物分布与纤维素和木质素质量比具有密切关系,但并不能通过加权计算进行产物分布的预测.纤维素与木质素以任意质量比共热解时均抑制了CO的形成,而促进了CO₂和H₂O的形成;促进了C₁—C₅烃的形成,而抑制了大部分含氧化合物的形成;质量比为5∶5时促进了苯酚和烃基苯酚的形成;当纤维素比较低时,对芳烃的形成具有明显的促进作用,而纤维素与木质素质量比为7∶3时对芳烃的形成具有抑制作用.

关键词: 纤维素, 木质素, 共热解, 气相反应, 轻质产物分布

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

中图分类号:

杨华美,蒋菊,刘望,张秉哲,徐盼盼. 纤维素/木质素共热解过程中的气相反应[J]. 河北大学学报(自然科学版), 2022, 42(3): 273-280.

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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纤维素/木质素共热解过程中的气相反应

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

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