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首页> 外文期刊>Floresta >ENERGETIC VALORIZATION OF SAWMILL RESIDUES THROUGH SLOW PYROLISIS PROCESS
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ENERGETIC VALORIZATION OF SAWMILL RESIDUES THROUGH SLOW PYROLISIS PROCESS

机译：通过慢速热解过程对锯末残留物进行能量平衡

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Brazil is a large producer of sawmill wastes, commonly used to supply boilers and produce energy. In order to reduce unwanted characteristics of the material, thermochemical conversions through carbonization is an alternative. The aim of this study is to characterize the energetic proprieties of raw biomass and pyrolyzed biomass of sawmill residues. In order to analyze the environmental impact in the emission of pyrolysis gases, the behavior of gases during the thermic treatment was determined. Eucalyptus sp. and Pinus sp. residues slow pyrolysis was performed in an electric kiln, whose gases were conducted through a condensable gas recovery system and an online gas analyzer. The charcoal, bio-oil and non-condensable gases yields were estimated. The wood’s and charcoal’s proximate analysis (extractives, lignin, holocellulosis, ash content), higher heating value, equilibrium moisture and density were appraised. The wood’s chemical components were esteemed. Hardwood and softwood’s charcoal presented several differences, especially in yields due to types of lignin. Hardwoods produce a higher amount of acetic acid in slow pyrolysis. This acid was converted, mainly, in carbon dioxide and e a minor extent in methane and carbon monoxide. The gas release was affected by the temperature and wood’s composition. The main gases resulting from the slow pyrolysis of wood are CO2, CO, CH4, H2. The emission of this gases to the atmosphere in addition to increasing the environmental impact caused by the industry is still a waste of energy that could be harnessed more efficiently. Pyrolysis increased the energetic characteristics of sawmill waste. However, in spite of the advantages of carbonization, ways to mitigate the emission of gases emitted in an operational scale should be evaluated.
机译：巴西是锯木厂废料的大生产国，通常用于供应锅炉和生产能源。为了减少材料的不良特性，可以选择通过碳化进行热化学转化。这项研究的目的是表征锯木厂残留物的原始生物质和热解生物质的能量特性。为了分析热解气体排放中的环境影响，确定了热处理过程中气体的行为。桉树和松属。残留物在电窑中进行缓慢的热解，其气体通过可冷凝气体回收系统和在线气体分析仪进行传导。估计了木炭，生物油和不凝性气体的产量。评估了木材和木炭的近似分析（提取物，木质素，纤维素分解物，灰分），较高的热值，平衡水分和密度。木材的化学成分受到重视。硬木和软木的木炭表现出几个差异，尤其是由于木质素类型的产量。硬木在缓慢的热解过程中会产生大量的乙酸。该酸主要转化为二氧化碳，少量转化为甲烷和一氧化碳。气体释放受温度和木材成分的影响。木材缓慢热解产生的主要气体为CO2，CO，CH4，H2。除了增加该行业对环境的影响外，这些气体向大气的排放仍然是能源的浪费，可以更有效地加以利用。热解提高了锯木厂废物的能量特性。然而，尽管有碳化的优势，但仍应评估减轻操作规模排放气体排放的方法。

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