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Decomposition and gasification of pyrolysis volatiles from pine wood through a bed of hot char

机译：松木通过热炭床分解和气化热解挥发物

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摘要

Pine wood was pyrolyzed in a fixed bed reactor at a heating rate of 10℃ and a final temperature of 700 ℃, and the resultant volatiles were allowed to be secondarily cracked through a tubular reactor in a temperature range of 500-700 ℃ with and without packing a bed of char. The thermal effect and the catalytic effect of char on the cracking of tar were investigated. An attempt was made to deconvolute the intermingled contributions of the char-catalyzed tar cracking and the char gasification to the yields of gaseous and liquid products. It was found that the wood char (charcoal) was catalytically active for the tar cracking at 500-600 ℃, while at 650-700 ℃, the thermal effect became a dominant mode of the tar cracking. Above 600 ℃, the autogenerated steam gasified the charcoal, resulting in a marked increase in the yield of gaseous product and a significant change in the gas composition. An anthracite char (A-char), a bituminous coal char (B-char), a lignite char (L-char) and graphite also behaved with catalytic activities towards the tar cracking at lower temperature, but only L-char showed reactivity for gasification at higher temperature.
机译：松木在固定床反应器中以10℃的加热速率和700℃的最终温度进行热解，然后在500-700℃的温度范围内，无论有无，将生成的挥发物通过管式反应器进行二次裂解。包装一张炭灰的床。研究了炭对焦油裂解的热效应和催化作用。试图使焦炭催化的焦油裂化和焦炭气化对气态和液态产物的收率的混合贡献反卷积。结果表明，木炭（焦炭）在500-600℃时对焦油裂解具有催化活性，而在650-700℃时，热效应成为焦油裂解的主要方式。高于600℃时，自动产生的蒸汽将木炭气化，从而导致气态产物的收率显着增加，并且气体组成发生显着变化。无烟煤焦（A-char），烟煤焦炭（B-char），褐煤焦炭（L-char）和石墨在较低温度下也具有对焦油裂解的催化活性，但只有L-char对在较高温度下气化。

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  • 来源
    《Fuel》 |2011年第3期|p.1041-1048|共8页
  • 作者

    Qingsong Sun; Sang Yu; Fuchen Wang; Jie Wang;

  • 作者单位

    Department of Chemical Engineering for Energy, East China University of Science and Technology, 130# Meilong Road, Shanghai 200237, PR China;

    Department of Chemical Engineering for Energy, East China University of Science and Technology, 130# Meilong Road, Shanghai 200237, PR China;

    Key Laboratory of Coal Gasification of Ministry of Education, East China University of Science and Technology, 130# Meilong Road. Shanghai 200237, PR China;

    Department of Chemical Engineering for Energy, East China University of Science and Technology, 130# Meilong Road, Shanghai 200237, PR 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

    pine wood; pyrolysis; gasification; catalytic tar cracking; char;

    机译：松木;热解;气化;焦油裂解;炭;

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