Radiative pyrolysis of single moist wood particles
Radiative pyrolysis of single moist wood particles
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DOI：
10.1021/ie990720i
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发表时间：
2000-03
影响因子：
4.2
通讯作者：
C. Blasi;A. Hernandez;A. Santoro
中科院分区：
文献类型：
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作者：
C. Blasi;A. Hernandez;A. Santoro
热厚山毛榉木材的辐射热解已经通过比较干燥和潮湿[11%干基（db）]颗粒进行了研究，热通量范围为27.5 - 80 kW/m2。初始水分含量也从0到50%（分贝）的两个辐射通量，27.5和49千瓦/平方米，对应于缓慢和快速的外部传热速率，稳定的表面温度分别约为625和800 K。对于非常缓慢的加热，水分蒸发先于木材热解。当外部加热条件变得更苛刻和/或初始含水量增加时，这两个过程同时发生，伴随着分离的前沿沿着颗粒半径的传播。空间梯度也增加，而明显的体重减轻动力学从单峰率变成双峰率。转化时间几乎线性增加与初始水分含量，但在初级产品（焦炭，气体和液体）的产量和气体组成的差异。
Radiative pyrolysis of thermally thick beech wood has been investigated through a comparison between dry and moist [11% dry basis (db)] particles, for heat fluxes in the range 27.5−80 kW/m2. The initial moisture content has also been varied from 0 to 50% (db) for two radiative fluxes, 27.5 and 49 kW/m2, corresponding to slow and fast external heat-transfer rates, as steady surface temperatures are about 625 and 800 K, respectively. For very slow heating, moisture evaporation precedes wood pyrolysis. As the external heating conditions are made more severe and/or the initial moisture content is increased, the two processes take place simultaneously, associated with the propagation of separate fronts along the particle radius. Spatial gradients also increase, while apparent weight loss kinetics from a single-peak rate turn into a two-peak rate. The conversion times increase almost linearly with the initial moisture content, but differences in primary product (char, gas, and liquids) yields and gas compositio...