为了研究低阶煤与生物质的共热解特性和协同作用机理，采用热重-质谱（TG-MS）联用对杨木、玉米秆分别与淖毛湖煤进行非等温共热解实验。结果表明，低阶煤与生物质共热解中的协同作用与掺混比例和生物质种类有关。淖毛湖煤与杨木的混合比为3:1时，共热解促进了挥发分的释放，半焦产率降低，氢气与甲烷产率低于加权计算的理论值，失重协同作用最显著。淖毛湖煤与玉米秆共热解时，协同作用主要表现为抑制挥发分的释放，提高半焦产率。氧化钙对共热解协同作用影响显著，能够延迟生物质的热解并降低淖毛湖煤的热解温度，增加热解区间的重合度促进煤与生物质挥发份之间的反应。氧化钙是影响杨木、玉米秆与淖毛湖煤共热解特性的重要因素之一。

To investigate the co-pyrolysis characteristics and synergistic mechanisms of sub-bituminous coal and biomass, non-isothermal co-pyrolysis experiments were conducted on poplar and corn stalks with Nao Mao Hu coal using a thermogravimetric analysis coupled with mass spectrometry (TG-MS). The results indicate that the synergistic effect in the co-pyrolysis of low-rank coal and biomass is influenced by blending ratios and biomass types. When Naomaohu coal is mixed with Yangmu wood at a ratio of 3:1, co-pyrolysis enhances the release of volatile matter, reduces the yield of semi-coke, and yields hydrogen and methane below the theoretically calculated values. The weight loss synergistic effect is most significant. In the co-pyrolysis of Naomaohu coal and corn stalk, the synergistic effect primarily manifests as the inhibition of volatile matter release and an increase in semi-coke yield. Calcium oxide significantly influences the co-pyrolysis synergistic effect, delaying the pyrolysis of biomass, lowering the pyrolysis temperature of Naomaohu coal, and increasing the overlap of pyrolysis intervals, thereby promoting reactions between coal and biomass volatile components. Calcium oxide is identified as one of the key factors affecting the co-pyrolysis characteristics of Yangmu wood, corn stalk, and Naomaohu coal.

TQ536

国家自然科学基金(51976129)；上海市科委项目(23010503500)