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首页> 外文期刊>Biomass & bioenergy >Flowability characterization of torrefied biomass powders: Static and dynamic testing
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Flowability characterization of torrefied biomass powders: Static and dynamic testing

机译：烘焙生物量粉末的流动性表征：静态和动态测试

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摘要

During the thermochemical valorization of biomass feedstock, the assessment of biomass powder flowability is essential for the design of feeding, storage, and handling systems. Biomass handling in valorization processes require powders to be characterized for both consolidated and static conditions, encountered in storage facilities, or under free-surface dynamic flow conditions, present in feeding systems. This paper evaluated the flow properties of two different sizes of raw, mildly and intensively torrefied poplar powders, using shear tests and the evaluation of avalanching behaviors, in a rotating drum. The size and shape descriptors showed that the particle size distributions and particle morphologies of the six samples were determined by the coupled effects of tor-refaction intensity and the sieving stage. According to the shear test results, although flowability trends are stress-dependent, coarse powders have better flow properties than fine powders. A flowability ranking was established, based on the parameters extracted from the flow dynamics inside of a rotating drum, including the tendency to form particle clumps, upper angle of stability, irregularity of avalanches, and the fraction of revolution for avalanches. The relationships among the macroscopic flow parameters, obtained from both characterization techniques and the powder characteristics (particle mean size, shape, and polydispersity) were examined using adjusted correlations. Overall, intense torrefaction appears to improve the flow behaviors of powders, under both free and consolidated flow conditions.
机译：在生物质原料的热化学储存期间，生物质粉末流动性的评估对于饲养，储存和处理系统的设计是必不可少的。储存过程中的生物质处理需要粉末，以表征在储存设施中遇到的固结和静态条件，或在馈送系统中存在的自由表面动态流动条件。本文评估了使用剪切试验和雪崩行为的剪切试验和评估旋转滚筒的两种不同尺寸的原料，温和和强烈的泪囊粉粉的流动性能。尺寸和形状描述符表明，六个样品的粒度分布和颗粒形态由Tor-Refaction强度和筛分阶段的偶联效果确定。根据剪切测试结果，尽管流动性趋势是应力依赖性的，但粗粉末具有比细粉的更好的流动性质。基于从旋转鼓内部的流动动力学提取的参数建立了流动性排名，包括形成颗粒块，稳定性的上稳定性，雪崩的不规则性的趋势，以及雪崩的旋转的一部分。使用调节的相关性检查从表征技术和粉末特性（颗粒平均尺寸，形状和多分散物）的宏观流动参数之间的关系。总体而言，在自由和固结的流动条件下，似乎强烈的烘焙术语似乎改善了粉末的流动行为。

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  • 来源
    《Biomass & bioenergy》 |2020年第7期|105608.1-105608.13|共13页
  • 作者

    John Pachon-Morales; Julien Colin; Joel Casalinho; Patrick Perre; Francois Puel;

  • 作者单位

    LGPM CentraleSupelec Universite Paris-Saclay 3 rue Joliot-Curie 91192 Gif-sur-Yvette France;

    LGPM CentraleSupelec Universite Paris-Saclay 3 rue Joliot-Curie 91192 Gif-sur-Yvette France LGPM CentraleSupelec Universite Paris-Saclay SFR Condorcet FR CNRS 3417 Centre Europeen de Biotechnologie et de Bioeconomie (CEBB) 3 rue des Rouges Terres 51110 Pomacle France;

    LGPM CentraleSupelec Universite Paris-Saclay 3 rue Joliot-Curie 91192 Gif-sur-Yvette France;

    LGPM CentraleSupelec Universite Paris-Saclay 3 rue Joliot-Curie 91192 Gif-sur-Yvette France LGPM CentraleSupelec Universite Paris-Saclay SFR Condorcet FR CNRS 3417 Centre Europeen de Biotechnologie et de Bioeconomie (CEBB) 3 rue des Rouges Terres 51110 Pomacle France;

    LGPM CentraleSupelec Universite Paris-Saclay 3 rue Joliot-Curie 91192 Gif-sur-Yvette France;

  • 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

    Ring shear tester; Rotating drum; Torrefaction; Flow properties; Cohesion; Woody biomass;

    机译：戒指剪切测试仪;旋转鼓;烘焙;流动性质;凝聚;伍迪生物量;

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