Influence of Torrefaction on Single Particle Combustion of Wood

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• 作者：Zhimin Lu ; Jie Jian ; Peter Arendt Jensen ; Hao Wu ; Peter Glarborg
• 刊名：Energy & Fuels
• 出版年：2016
• 出版时间：July 21, 2016
• 年：2016
• 卷：30
• 期：7
• 页码：5772-5778
• 全文大小：420K
• 年卷期：0
• ISSN：1520-5029

文摘

This study focuses on the influence of torrefaction on the char reactivity, char yield, and combustion time of 3–5 mm spherical wood particles in a single particle combustion reactor (SPC) operating at a nominal temperature of 1231 °C. The devolatilization times were reduced and the char burnout times were increased with increasing torrefaction degree. The devolatilization time depended linearly on the particle mass. The torrefaction pretreatment resulted in a marked increase in char yield and char particle density but no intrinsic reactivity change as determined by thermogravimetric analysis. The char yield and char particle density increased from 9 wt % and 123 kg/m³ for raw particles to 14 wt % and 259 kg/m³ for particles pretreated at 290 °C for 4 h. The results of this study demonstrate that the higher char yield and density are the main reasons for the longer combustion time of torrefied wood.