为了探索生物质主要组分在与塑料共热解过程中的协同效应和小分子气体产物的变化规律，笔者采用热重-质谱联用（TG-MS）技术研究纤维素、木聚糖、木质素与聚乙烯的共热解特性。共热解样品的混合比例为1∶1（w/w），TG实验得到了各单组分以及混合组分的失重区间，通过对单组分TG数据的拟合得到理论值与实验值，比较得到混合组分在共热解过程中存在协同效应，可促进样品的分解。MS实验数据表明，在共热解过程中聚乙烯的存在促进了生物质组分的分解，从而使小分子气体产物的产量增加。纤维素热解的小分子产物中H2O和CO2的产量增大；木聚糖和聚乙烯在共热解过程中会促进对方分解，H₂O，CH₄，H₂ 和C₂H₄都有更高的产量；木质素和聚乙烯的共热解过程会促进CO，C2H4和H2的产生。

In order to explore the synergetic effect and the variation of small molecule gas products in the co-pyrolysis process of main components of biomass with plastics , a thermogravimetry-mass spectrum (TG-MS) method was used to study the co-pyrolysis characteristics of cellulose, xylan, lignin with polyethylene. The blending ratio of each co-pyrolysis sample was 1∶1(w/w). The weight loss intervals of the single components and the mixed components were obtained by the TG experiment, and the theoretical and experimental values were obtained by fitting the TG data of the individual components. It can be confirmed that the synergetic effect exists in the process of co-pyrolysis , and this effect promotes the decomposition of the samples. MS experimental data shows that the presence of polyethylene could facilitate the decomposition of the biomass components and increase the yield of small molecule gas products during the process of co-pyrolysis. The production of H₂O and CO₂ in the small molecular products in the pyrolysis of cellulose with polyethylene was increased. The xylan and polyethylene will promote the decomposition of each other during the co-pyrolysis process, and the yield of H₂O, CH₄, H₂ and C₂H₄ will be raised. The co-pyrolysis between lignin and polyethylene could promote the the yield of CO, C₂H₄ and H₂.