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Effects of Torrefaction on Particle Size Distribution of Corn Stover

机译：烘焙对玉米秸秆粒度分布的影响

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Mild pyrolysis, or torrefaction, is a thermochemical pretreatment for biomass used to address these issues. In this process, biomass is heated in an oxygen-free environment at temperatures of 200-300°C. Torrefaction of biomass increases the brittleness of the material, thus reducing the energy requirements for grinding it. Grinding of biomass is important for applications such as pyrolysis and gasification, where particle size is critical for efficiency. In this study, torrefied corn stover and untreated corn stover were ground using a ball mill reactor. The ground material was then sieved to determine the particle size distribution of the respective materials. The particle size distribution was used to quantify the effect of torrefaction on grinding biomass. The torrefaction process increased the brittleness of the corn stover, yielding a more finely ground material than the untreated biomass. The final objective was to combine the torrefaction and particle size reduction stages into a single process. A limiting factor in the torrefaction process is heat transfer through large particles. By combining the torrefaction and particle size reduction stages, a more uniform final product can be created.
机译：轻度热解或烘焙，是用于解决这些问题的生物量的热化学预处理。在该方法中，生物质在200-300℃的温度下在无氧环境中加热。生物质的烘焙增加了材料的脆性，从而降低了研磨的能量要求。生物质的研磨对于诸如热解和气化的应用是重要的，其中粒度对于效率至关重要。在本研究中，使用球磨机反应器研磨雾化的玉米秸秆和未处理的玉米秸秆。然后筛分地层以确定各种材料的粒度分布。粒度分布用于量化烘焙对研磨生物质的影响。烘焙过程增加了玉米秸秆的脆性，产生比未处理的生物质更精细的研磨材料。最终目标是将烘焙和粒度减少阶段结合到一个过程中。烘焙过程中的限制因素是通过大颗粒的热传递。通过组合烘焙和粒度减小阶段，可以产生更均匀的最终产品。

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