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首页> 外文期刊>Combustion and Flame >Gasification of a pulverized sub-bituminous coal in CO_2 at atmospheric pressure in an entrained flow reactor
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Gasification of a pulverized sub-bituminous coal in CO_2 at atmospheric pressure in an entrained flow reactor

机译：在气流床中在大气压力下将粉状亚烟煤在CO_2中气化

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摘要

Char gasification by CO2 may play an important role in oxy-fuel applications and affect particle temperature histories and overall reaction rates during combustion. This paper presents the results of a complete set of experiments of char gasification in CO2 performed with a pulverized Indonesian sub-bituminous coal in an entrained flow reactor under realistic conditions; series of burnout curves at different reactor temperatures (1040-1300 ℃) and CO_2 concentrations (0.7-100%) reveal consistent trends in the gasification rates. The study included also devolatilization and oxidation tests with this coal in the same experimental facility. The data are used to derive apparent kinetics for the three processes, in a manner similar to that followed in a previous work for the oxidation of a pulverized coal. The gasification kinetic parameters and reaction rates measured are then compared with values taken or derived from previous works by others, obtained by thermogravimetric analysis or experiments in entrained flow reactors. Finally, the relevance of char gasification in the overall reaction rate under conditions representative of those in an industrial boiler is explored, in particular for the case of oxy-coal combustion.
机译：由CO2引起的焦炭气化在含氧燃料应用中可能起重要作用，并影响燃烧过程中的颗粒温度历史和总体反应速率。本文介绍了在现实条件下，用粉状印尼亚烟煤在夹带流反应器中进行的全套二氧化碳焦炭气化实验的结果。在不同的反应器温度（1040-1300℃）和CO_2浓度（0.7-100％）下的一系列燃尽曲线揭示了气化速率的一致趋势。该研究还包括在同一实验设施中对该煤进行脱挥发分和氧化测试。该数据用于推导这三个过程的表观动力学，其方式类似于先前粉煤氧化的工作。然后，将所测量的气化动力学参数和反应速率与通过热重分析或在气流床反应器中的实验所获得的值或他人的先前工作得出的值进行比较。最后，研究了在代表工业锅炉中条件的条件下，焦炭气化与总反应速率的相关性，特别是对于氧气-煤燃烧的情况。

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  • 来源
    《Combustion and Flame》 |2012年第1期|p.385-395|共11页
  • 作者

    Cristina Gonzalo-Tirado; Santiago Jimenez; Javier Ballester;

  • 作者单位

    LITEC/CSIC (Spanish Council for Scientific Research), Maria de Luna 10, 50018 Zaragoza, Spain;

    LITEC/CSIC (Spanish Council for Scientific Research), Maria de Luna 10, 50018 Zaragoza, Spain;

    Fluid Mechanics Croup, LLTEC/University of Zaragoza, Maria de Luna 3, 50018 Zaragoza, Spain;

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

    pulverized coal; co_2 gasification; kinetics; oxy-combustion;

    机译：煤粉;CO_2气化;动力学;氧燃烧;

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