摘要
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-质谱联用设备对不同配比的淖毛湖煤与杨木、玉米秆进行非等温共热解实验。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,当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,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;CaO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,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。
To investigate the co-pyrolysis characteristics and synergistic mechanism between low-rank coal and biomass,non-isothermal co-pyrolysis experiments of Naomaohu coal,poplar wood and corn stalk in different proportions were conducted using a thermogravimetric-mass spectrometry combined apparatus.The results indicate that the synergistic effect in the co-pyrolysis of low-rank coal and biomass is influ-enced by blending ratios and biomass types.When Naomaohu coal is mixed with poplar wood at a ratio of 3:1,co-pyrolysis enhances the release of volatile matter,reduces the yield of semi-coke,and yields hy-drogen and methane below the theoretically weighted calculation values.The synergistic effect is most sig-nificant;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 is identified as one of the key factors affecting the co-pyrolysis characteristics of poplar wood,corn stalk,and Naomaohu coal,which significantly influences the co-pyrolysis synergistic effect,delays the pyrolysis of biomass,re-duces the pyrolysis temperature of Naomaohu coal,and increases the overlap of pyrolysis intervals,there-by promoting reactions between coal and biomass volatile matters.
作者
董波
金晶
梁国威
顾晨恺
DONG Bo;JIN Jing;LIANG Guowei;GU Chenkai(School of Energy and Power Engineering,University of Shanghai for Science and Technology,Shanghai,China,200093;Shanghai Key Laboratory of Multiphase Flow and Heat Transfer in Power Engineering,Shanghai,China,200093)
出处
《热能动力工程》
CAS
CSCD
北大核心
2024年第5期93-103,共11页
Journal of Engineering for Thermal Energy and Power
基金
国家自然科学基金(51976129)
上海市科委项目(23010503500)。
关键词
低阶煤
生物质
共热解
协同作用
氧化钙
low-rank coal
biomass
co-pyrolysis
synergistic effect
calcium oxide
