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首页> 外文期刊>Biomass & bioenergy >Particle segregation in spouted bed pyrolysis reactor: Sand-coconut shell and sand-cocoa shell mixtures
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Particle segregation in spouted bed pyrolysis reactor: Sand-coconut shell and sand-cocoa shell mixtures

机译：喷出床热解反应器中的颗粒隔离：砂椰子壳和砂可可壳混合物

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摘要

The singularity of air-particle flow characteristics and segregation phenomenon are still the main obstacles for application of conical spouted bed (CSB) for fast pyrolysis. This paper aims to investigate statistically the operating parameters (minimum spouting velocity and bed pressure drop) and biomass segregation (biomass mixing index) in a CSB composed of biomass (coconut and cocoa shells) and sand mixtures. Models for the pressure drop and inlet air velocity at the minimum spouting condition and for the axial mixing index were obtained. The bed voidage does not change significantly with the increase of biomass mass fraction (coconut and cocoa shells), therefore, larger amounts of biomass can be used without greatly increasing or decreasing the inlet air velocity to stabilize the spouted regime. From the analysis of bed stability and particle segregation, significant insights were obtained for future application of the CSB for the pyrolysis of biomasses. It is recommended the use of mixtures with 40 wt% of coconut shells and 75 wt% of cocoa shells in initial pyrolysis tests in CSB reactor. The cocoa shells particles are more suitable to pyrolysis because of their higher flowability.
机译：空气颗粒流动特性和偏析现象的奇异性仍然是用于在快速热解的锥形喷射床（CSB）的主要障碍。本文旨在调查统计上CSB中的操作参数（最小喷射速度和床压降）和生物质隔离（生物质混合指数），其组成的生物质（椰子和可可壳）和沙子混合物。获得了最小喷孔条件和轴向混合指数处的压降和入口空气速度的模型。随着生物质质量分数的增加（椰子和可可壳）的增加，床停留不会显着变化，因此可以使用较大量的生物质而不会大大增加或减少入口空气速度以稳定喷射的状态。根据床稳定性和颗粒隔离的分析，获得了显着的见解，以便将CSB应用于生物量热解的未来应用。建议在CSB反应器中使用具有40wt％的椰壳和75wt％的可可壳的混合物，并在CSB反应器中进行初始热解试验。可可壳颗粒更适合于热解，因为它们的流动性较高。

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  • 来源
    《Biomass & bioenergy》 |2020年第7期|105592.1-105592.11|共11页
  • 作者

    K.M. Barcelos; P.S. Almeida; M.S. Araujo; T.P. Xavier; K.G. Santos; M.S. Bacelos; T. S. Lira;

  • 作者单位

    Programa de Pos-Graduacao em Energia Universidade Federal do Espirito Santo Sao Mateus ES Brazil;

    Programa de Pos-Graduacao em Energia Universidade Federal do Espirito Santo Sao Mateus ES Brazil;

    Departamento de Engenharias e Tecnologia Universidade Federal do Espirito Santo Sao Mateus ES Brazil;

    Departamento de Engenharias e Tecnologia Universidade Federal do Espirito Santo Sao Mateus ES Brazil;

    Departamento de Engenharia Quimica Universidade Federal do Triangulo Mineiro Uberaba MG Brazil;

    Departamento de Engenharias e Tecnologia Universidade Federal do Espirito Santo Sao Mateus ES Brazil;

    Departamento de Engenharias e Tecnologia Universidade Federal do Espirito Santo Sao Mateus ES Brazil;

  • 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

    Cocoa; Coconut; Energy; Fast pyrolysis; Fluid dynamics; Particle mixing;

    机译：可可;椰子;活力;快速热解;流体动力学;颗粒混合;

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