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首页> 美国卫生研究院文献>Royal Society Open Science >Experiments on torrefied wood pellet: study by gasification and characterization for waste biomass to energy applications
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Experiments on torrefied wood pellet: study by gasification and characterization for waste biomass to energy applications

机译：烘焙木屑颗粒的实验：通过气化和表征研究废物生物质在能源方面的应用

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摘要

Samples of torrefied wood pellet produced by low-temperature microwave pyrolysis were tested through a series of experiments relevant to present and near future waste to energy conversion technologies. Operational performance was assessed using a modern small-scale downdraft gasifier. Owing to the pellet's shape and surface hardness, excellent flow characteristics were observed. The torrefied pellet had a high energy density, and although a beneficial property, this highlighted the present inflexibility of downdraft gasifiers in respect of feedstock tolerance due to the inability to contain very high temperatures inside the reactor during operation. Analyses indicated that the torrefaction process had not significantly altered inherent kinetic properties to a great extent; however, both activation energy and pre-exponential factor were slightly higher than virgin biomass from which the pellet was derived. Thermogravimetric analysis-derived reaction kinetics (CO2 gasification), bomb calorimetry, proximate and ultimate analyses, and the Bond Work Index grindability test provided a more comprehensive characterization of the torrefied pellet's suitability as a fuel for gasification and also other combustion applications. It exhibited significant improvements in grindability energy demand and particle size control compared to other non-treated and thermally treated biomass pellets, along with a high calorific value, and excellent resistance to water.
机译：通过与当前和不久的将来的废物到能源转化技术相关的一系列实验，对通过低温微波热解生产的焙烤过的木屑样品进行了测试。使用现代化的小型下浮式气化炉评估运行性能。由于颗粒的形状和表面硬度，观察到优异的流动特性。焙干的丸粒具有高的能量密度，并且尽管具有有益的性能，但是由于操作期间不能在反应器内部容纳非常高的温度，因此这突出显示了向下气流的气化炉在原料耐受性方面目前不灵活。分析表明，烘焙过程并未在很大程度上改变内在的动力学性质。然而，活化能和指数前因子均略高于衍生出颗粒的原始生物质。热重分析得出的反应动力学（CO2气化），炸弹量热法，近似分析和最终分析，以及Bond Work Index可磨性测试提供了对焙烧后的颗粒作为气化和其他燃烧应用燃料的适用性的更全面的表征。与其他未经处理和热处理的生物质颗粒相比，它在可磨性能量需求和粒度控制方面显示出显着的改进，同时具有很高的热值和出色的耐水性。

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