Bed Agglomeration Characteristics and Mechanisms during Gasification and Combustion of Biomass Fuels
Bed Agglomeration Characteristics and Mechanisms during Gasification and Combustion of Biomass Fuels
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DOI：
10.1021/ef040093w
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发表时间：
2005-06
期刊：
影响因子：
5.3
通讯作者：
M. Öhman;L. Pommer;A. Nordin
中科院分区：
文献类型：
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作者：
M. Öhman;L. Pommer;A. Nordin
在实验室规模的流化床（5 kW）中，在气化和燃烧条件下，使用六种代表性的生物质燃料（树皮、卢塞恩、草芦、甘蔗渣、橄榄果肉和甘蔗渣）进行受控附聚试验。使用扫描电子显微镜/能量色散谱（SEM/EDS）分析得到的床材料，并进行化学平衡计算，以便于解释实验结果。层的燃料灰衍生的化合物建立在床颗粒在处理过程中的所有研究的燃料。累积的物质被确定为由两层组成：（i）内部较厚且较均匀的层，主要由K-Ca-硅酸盐组成;（ii）较薄且富含颗粒的外层。对于除卢塞恩以外的所有燃料，在气化和燃烧之间，床层团聚趋势或床层颗粒层特性没有大的差异，这表明层流化床的特性没有大的差异。
Controlled agglomeration tests, using six representative biomass fuels (bark, Lucerne, reed canary grass, bagasse, olive flesh, and cane trash) were performed in a bench-scale fluidized bed (5 kW) during both gasification and combustion conditions. The resulting bed materials were analyzed using scanning electron microscopy/energy-dispersive spectroscopy (SEM/EDS), and chemical equilibrium calculations were performed to facilitate the interpretation of the experimental findings. Layers of fuel-ash-derived compounds were built up on the bed particles during processing of all studied fuels. The accumulated material was determined to consist of two layers: (i) an inner thicker and more homogeneous layer that consisted of mainly K−Ca-silicates and (ii) a thinner, particle-rich outer layer. For all fuels except Lucerne, no major differences in bed agglomeration tendencies or bed particle layer characteristics could be detected between gasification and combustion, which suggested no major difference in layer f...