Abstract

This work leads to improvement towards fuel efficiency of biomass by pelletizing at different pressures with different percentage of coal. Two species of wood sawdust–Gurjan Balsam, Teak, and a coal sample were used in this study. Analysis of unprocessed raw materials were conducted to evaluate their fuel characteristics. From our observation, it is eminent that pellet density increases radically at pressures of 3.055–6.111MPa. This phenomenon eventually causes minor density increases with increased pressure. An increasing pattern was also observed in the variation of the heating value of pellets with the increased pelletizing pressure in both samples. Bonding between biomass particles has been identified as the main factor which influences the heating value. Consequently, this variation in bonding alters the heating value at different pressures. The formation of the solid bridge due to lignin flow and inter-diffusion between adjacent biomass particles are responsible for binding with coal and increased heating value at higher pressures. The presence of van der Waals forces and hydrogen bonding also increases the heating value with increasing pressure.

中文翻译：

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压缩压力和煤结合对生物质颗粒燃料特性的影响

摘要

这项工作通过在不同压力下用不同百分比的煤进行造粒来提高生物质的燃料效率。本研究使用了两种木屑——古尔扬香脂、柚木和煤样。对未加工的原材料进行分析以评估它们的燃料特性。根据我们的观察，在 3.055-6.111 MPa 的压力下，球团密度急剧增加。这种现象最终会导致密度随着压力的增加而增加。在两个样品中，随着造粒压力的增加，在球团热值的变化中也观察到了增加的模式。生物质颗粒之间的结合已被确定为影响热值的主要因素。因此，这种结合的变化会改变不同压力下的热值。由于木质素流动和相邻生物质颗粒之间的相互扩散而形成的固体桥是与煤结合并在较高压力下增加热值的原因。范德华力和氢键的存在也会随着压力的增加而增加热值。