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One-dimensional modeling of a dual fluidized bed for biomass steam gasification

机译：生物质蒸汽气化双流化床的一维建模

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摘要

A one-dimensional model for biomass steam gasification in dual fluidized bed gasifiers is set up with the assistance of Aspen Plus. Both the hydrodynamic and kinetic processes are coupled and simulated. The model predictions agree well with the experimental data reported in the literature. Sensitivity analyses are also performed to investigate the effects of different operating parameters, including the inlet biomass flow rate (F-bio), the steam-to-biomass ratio (R-sb), the sand circulation flux (S-cf) and the flow rate of the additional methane. burnt in the riser (F-m). Under the benchmark conditions, the mole fractions of H-2 and CO2 increase along the height of the bubbling fluidized bed (BFB), while those of CO and CH4 decrease. The gasification temperature decreases slightly against the height in the bed zone, but increases in the freeboard zone. The superficial velocity slightly increases and the bubbles grow against the height in the BFB. Increasing both F-bio and R-sb restricts the gasification process, increasing S-cf only slightly affects the gasification results, and increasing F-m promotes the gasification process. (C) 2016 Elsevier Ltd. All rights reserved.
机译：借助Aspen Plus建立了双流化床气化炉中生物质蒸汽气化的一维模型。流体动力学和动力学过程都被耦合和模拟。模型预测与文献报道的实验数据吻合良好。还进行了敏感性分析，以研究不同操作参数的影响，包括入口生物质流速（F-bio），蒸汽生物质比（R-sb），砂循环通量（S-cf）和附加甲烷的流速。在立管中燃烧（F-m）。在基准条件下，H-2和CO2的摩尔分数沿鼓泡流化床（BFB）的高度增加，而CO和CH4的摩尔分数则降低。气化温度随床层高度的增加而略有降低，但在干舷区的升高。表面速度略有增加，气泡随BFB中的高度而增长。增加F-bio和R-sb会限制气化过程，增加S-cf只会轻微影响气化结果，而增加F-m会促进气化过程。 （C）2016 Elsevier Ltd.保留所有权利。

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  • 来源
    《Energy Conversion & Management》 |2016年第11期|612-622|共11页
  • 作者

    Yan Linbo; Lim C. Jim; Yue Guangxi; He Boshu; Grace John R.;

  • 作者单位

    Beijing Jiaotong Univ, Sch Mech Elect & Control Engn, Inst Combust & Thermal Syst, Beijing 100044, Peoples R China|Univ British Columbia, Dept Chem & Biol Engn, Vancouver, BC V6T 1Z3, Canada|Tsinghua Univ, Minist Educ, Dept Thermal Engn, Key Lab Thermal Sci & Power Engn, Beijing 100084, Peoples R China;

    Univ British Columbia, Dept Chem & Biol Engn, Vancouver, BC V6T 1Z3, Canada;

    Tsinghua Univ, Minist Educ, Dept Thermal Engn, Key Lab Thermal Sci & Power Engn, Beijing 100084, Peoples R China;

    Beijing Jiaotong Univ, Sch Mech Elect & Control Engn, Inst Combust & Thermal Syst, Beijing 100044, Peoples R China;

    Univ British Columbia, Dept Chem & Biol Engn, Vancouver, BC V6T 1Z3, Canada;

  • 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

    Dual fluidized bed (DFB); Bubbling fluidized bed (BFB); Steam gasification; Simulation; Biomass;

    机译：双流化床（DFB）;鼓泡流化床（BFB）;蒸汽气化;模拟;生物质;

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