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含氧/蒸汽气氛中煤高温分解产物分布及反应性

吴仕生,  曾玺,  任明威,  汪印,  徐绍平,  许光文

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文章导航 > 燃料化学学报（中英文）  > 2012 >  40(06): 660-665
吴仕生, 曾玺, 任明威, 汪印, 徐绍平, 许光文. 含氧/蒸汽气氛中煤高温分解产物分布及反应性[J]. 燃料化学学报（中英文）, 2012, 40(06): 660-665.
引用本文: 吴仕生, 曾玺, 任明威, 汪印, 徐绍平, 许光文. 含氧/蒸汽气氛中煤高温分解产物分布及反应性[J]. 燃料化学学报（中英文）, 2012, 40(06): 660-665.
shu
WU Shi-sheng, ZENG Xi, REN Ming-wei, WANG Yin, XU Shao-ping, XU Guang-wen. Product distribution and reactivity of coal pyrolysis at high temperature and in atmospheres containing O2/steam[J]. Journal of Fuel Chemistry and Technology, 2012, 40(06): 660-665.
Citation: WU Shi-sheng, ZENG Xi, REN Ming-wei, WANG Yin, XU Shao-ping, XU Guang-wen. Product distribution and reactivity of coal pyrolysis at high temperature and in atmospheres containing O2/steam[J]. Journal of Fuel Chemistry and Technology, 2012, 40(06): 660-665.
shu

含氧/蒸汽气氛中煤高温分解产物分布及反应性

  • 1.

    大连理工大学化学工艺系 精细化工国家重点实验室, 辽宁 大连 116012;

  • 2.

    中国科学院过程工程研究所 多相复杂系统国家重点实验室, 北京 100190

基金项目: 国家自然科学基金(21006110); 国家科技支撑项目(2009BAC641305, 2010BAC66B01); 国家重点基础研究发展规划(973计划, 2011CB201304); 国家高技术研究发展计划(863计划, 2009AA02Z209)。
详细信息
    通讯作者:

    许光文, 汪印, Tel: 010-82544886, E-mail: gwxu@home.ipe.ac.cn, wangyin@home.ipe.ac.cn。

  • 中图分类号: TQ546.4

Product distribution and reactivity of coal pyrolysis at high temperature and in atmospheres containing O2/steam

  • 1.

    State Key Laboratory of Fine Chemicals, Department of Chemical Engineering, Dalian University of Technology, Dalian 116012, China;

  • 2.

    State Key Laboratory of Multi-Phase Complex Systems, Institute of Process Engineering, Chinese Academy of Science, Beijing 100190, China

    摘要
  • 摘要: 在流化床反应器中考察了含氧/水蒸气气氛中煤在850 ℃下的热解特性,包括产物分布特性及生成的半焦与焦油的反应性,研究了温度、过量空气比(Equivalence ratio: ER)和水蒸气/煤比(S/C, 质量比)的影响。结果表明,随热解温度、ER和S/C质量比的增加,气体产率增加,而半焦和焦油产率减少。O2的加入使CO2、CO含量明显增加,H2含量降低。O2和水蒸气的加入使半焦的比表面积显著增加,半焦气化活性增强,但半焦在900 ℃和 ER 为0.22的条件下出现轻微石墨化,降低了其气化活性。同时,反应气氛中含有O2和水蒸气对焦油的性质有显著影响,与单纯的N2气氛相比,O2和水蒸气的存在使热解焦油中单环芳烃、酮类、酚类、脂肪烃都明显减少,这对于焦油的进一步裂解及重整更加有利。
    Abstract: The product distribution and reactivity of coal pyrolysis at temperatures up to 850 ℃ and in atmospheres containing O2 and steam were studied. The effects of reaction temperature, equivalent air ratio (ER) and the mass ratio of steam to coal (S/C) were examined. The gas yield increased with the increases of the temperature, ER and S/C, whereas the yields of char and tar correspondingly decreased. When O2 was present in the atmosphere, the CO2 and CO productions obviously increased, while that of H2 decreased. The simultaneous presence of O2 and steam in the atmosphere improved the specific surface area and reactivity of the resultant char. However, the gasification reactivity of char produced at 900 ℃ in N2 and/or in an atmosphere with an ER 0.22 at 850 ℃ was low because of occurrence of carbon graphitization. The inclusion of O2 and steam into the atmosphere had a great effect on the tar properties. Compared with pyrolysis in pure N2, the tar produced in O2 and steam contained fewer single-ring aromatics and phenolic, ketonic and aliphatic hydrocarbons, which made the tar more reactive for cracking and reforming.
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出版历程
  • 收稿日期:  2011-09-24
  • 修回日期:  2011-11-19
  • 刊出日期:  2012-06-30

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