低阶煤与生物质共热解特性实验研究
Experimental Study on Co-pyrolysis Characteristics of Low-rank Coal and Biomass
董波 1金晶 1梁国威 1顾晨恺1
作者信息
- 1. 上海理工大学 能源与动力工程学院,上海 200093;上海市动力工程多相流与传热重点实验室,上海 200093
- 折叠
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.
Abstract
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.
关键词
低阶煤/生物质/共热解/协同作用/氧化钙Key words
low-rank coal/biomass/co-pyrolysis/synergistic effect/calcium oxide引用本文复制引用
基金项目
国家自然科学基金(51976129)
上海市科委项目(23010503500)
出版年
2024
NETL
NSTL
万方数据