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.
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.
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