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生物质化学工程 ›› 2017, Vol. 51 ›› Issue (3): 41-47.doi: 10.3969/j.issn.1673-5854.2017.03.007

• 研究报告 • 上一篇    下一篇

热解终温对花生壳炭化产物的影响研究

田宜水1,2, 王茹1,3   

  1. 1. 农业部规划设计研究院, 北京 100125;
    2. 农业部农业废弃物能源化利用重点实验室, 北京 100125;
    3. 中国农业大学 工学院, 北京 100083
  • 收稿日期:2016-05-12 出版日期:2017-05-30 发布日期:2017-06-01
  • 作者简介:田宜水(1972-),男,辽宁阜新人,研究员,主要从事生物质能资源开发利用研究工作;E-mail:yishuit@yahoo.com。
  • 基金资助:
    2015年农村能源综合建设项目(2015-59)

Effect of Final Pyrolysis Temperature on Pyrolysis Products of Peanut Shells

TIAN Yishui1,2, WANG Ru1,3   

  1. 1. Chinese Academy of Agricultural Engineering, Beijing 100125, China;
    2. Key Laboratory of Energy Resource Utilization from Agricultural Residues, Ministry of Agriculture, Beijing 100125, China;
    3. College of Engineering, China Agricultural University, Beijing 100083, China
  • Received:2016-05-12 Online:2017-05-30 Published:2017-06-01

摘要: 采用自制的生物质固定床热解装置研究了不同热解终温对花生壳炭化产物的影响。结果表明:随着热解终温的增加,生物炭质量和能源产率总体上呈现降低趋势,热解气产率呈现上升趋势(热值显著提高),其中液体质量产率在550℃时达到最大值;热解终温的增加使花生壳生物炭中固定碳、灰分不断提高,C元素不断提高,H元素与O元素含量则不断降低,生物炭的化学和生物稳定性提高;生物炭的热值在500℃时达到最大值,为24.346MJ/kg。生物炭的燃烧过程包括水分蒸发、固定碳及挥发分燃烧和燃尽等3阶段,其燃烧起始时间明显晚于花生壳,不同温度制备的生物炭的综合燃烧特性指数(S)从大到小的顺序依次为:C500 > C350 > C600 > C400 > C450 > C550;热解终温为550℃时,生物炭的比表面积、微孔表面积、总孔容积和微孔容积均最大,分别为50.58m2/g、29.56m2/g、0.01543cm3/g和0.01111cm3/g,与活性炭相比仍有较大差距,需要进一步处理。

关键词: 花生壳, 热解, 炭化, 生物炭, 特性

Abstract: The pyrolysis experiments of peanut shells under different temperatures were carried on the fixed bed pyrolysis device,which was manufactured by Chinese Academy of Agricultural Engineering. The results showed that with the increase of the final pyrolysis temperature,the yields of bio-char and energy reduced gradually;the yields of tar and pyrolysis gas were raised,as well as the heat value. And the yields of tar reached the maximum at 550℃. The fixed carbon,ash and carbon element of the bio-char increased,the hydrogen element and oxygen element decreased,and the aromatic structure and chemical biological stability improved with the increase of final pyrolysis temperature. And the heat value of bio-char achieved the maximum(24.346MJ/kg) at 500℃. The bio-char combustion process included evaporation,fixed carbon and volatile combustion,and its ignition time was significantly later than that of peanut shells. The order of comprehensive combustion characteristic index(S) of bio-char from large to small was C500 > C350 > C600 > C400 > C450 > C550. When the final pyrolysis temperature was 550℃,the specific surface area,microporous surface area,total pore volume and microporous volume of bio-char were the highest,which were 50.58m2/g and 29.56m2/g,0.01543cm3/g,and 0.01111cm3/g,respectively. However,there was still a big gap between the results of activated carbon. This required further processing.

Key words: peanut shell, pyrolysis, carbonization, bio-char, characteristic

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