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Effect of volatiles interaction during pyrolysis of cellulose, hemicellulose, and lignin at different temperatures

机译：纤维素，半纤维素和木质素热解期间挥发物相互作用的影响不同温度

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摘要

Secondary reactions, including those caused by the interaction of volatiles, are unavoidable during biomass pyrolysis. This study investigated the interactions of the volatiles from cellulose, hemicellulose, and lignin in a two-stage fixed bed reactor without a pre-mixed feedstock. The yield distribution of the products and gases, and the composition of liquids were all affected by the interaction of the volatiles. The interactions increased the gas yield but inhibited the liquid yield. However, when temperature increased, the interactions weakened in the presence of cellulose but increased when hemicellulose and lignin were used. Independent of feedstock, the interactions also generated CO2 and H-2 at 400-700 degrees C and inhibited the generation of CH4 and phenols below 500 degrees C and 400-700 degrees C, respectively. However, several feedstock-dependent interactions were also observed: 1) CH4 generation increased at temperatures above 600 degrees C in the presence of lignin volatiles; 2) both hemicellulose and lignin volatiles resulted in significant amounts of cellulose-derived sugars at temperatures above 500 degrees C; and 3) hemicellulose volatiles increased decomposition of cellulose volatiles, while the latter inhibited the decomposition of lignin volatiles, when the temperature was below 500 degrees C.
机译：包括由挥发物相互作用引起的二次反应在生物质热解期间是不可避免的。本研究研究了纤维素，半纤维素和木质素中挥发物在两阶段固定床反应器中的相互作用，没有预混合的原料。产物和气体的产量分布，液体的组成受挥发物相互作用的影响。相互作用增加了气体产量，但抑制了液体产率。然而，当温度增加时，在使用半纤维素和木质素时，相互作用在纤维素存在下削弱，但使用了半纤维素和木质素。独立于原料，相互作用也在400-700摄氏度下产生CO 2和H-2，并抑制在500℃和400-700摄氏度以下的CH 4和酚的产生。然而，也观察到几种原料依赖性相互作用：1）在木质素挥发物存在下，CH 4在600℃的温度下增加; 2）半纤维素和木质素挥发物在500℃以上的温度下导致大量的纤维素衍生的糖; 3）半纤维素挥发物增加纤维素挥发物的分解，而后者抑制了木质素挥发物的分解，当温度低于500℃时。

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  • 来源
    《Fuel》 |2019年第jul15期|1-7|共7页
  • 作者

    Chen Yingquan; Fang Yang; Yang Haiping; Xin Shanzhi; Zhang Xiong; Wang Xianhua; Chen Hanping;

  • 作者单位

    Huazhong Univ Sci & Technol State Key Lab Coal Combust Wuhan 430074 Hubei Peoples R China;

    Huazhong Univ Sci & Technol State Key Lab Coal Combust Wuhan 430074 Hubei Peoples R China;

    Huazhong Univ Sci & Technol State Key Lab Coal Combust Wuhan 430074 Hubei Peoples R China;

    Jianghan Univ Hubei Key Lab Ind Fume & Dust Pollut Control Wuhan 430056 Hubei Peoples R China;

    Huazhong Univ Sci & Technol State Key Lab Coal Combust Wuhan 430074 Hubei Peoples R China;

    Huazhong Univ Sci & Technol State Key Lab Coal Combust Wuhan 430074 Hubei Peoples R China;

    Huazhong Univ Sci & Technol State Key Lab Coal Combust Wuhan 430074 Hubei Peoples R China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Biomass pyrolysis; Volatiles interaction; Cellulose; Hemicellulose; Lignin;

    机译：生物质热解;挥发物相互作用;纤维素;半纤维素;木质素;

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