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首页> 外文期刊>Revista rvore >Estudo da decomposi??o térmica da madeira de oito espécies da regi?o do Seridó, Rio Grande do Norte
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Estudo da decomposi??o térmica da madeira de oito espécies da regi?o do Seridó, Rio Grande do Norte

机译：研究八种Seridó地区的热分解，Rio Grande Do Norte

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The objective of this study was to evaluate the profile of the thermal decomposition of the wood of eight species using thermogravimetry (TGA) techniques and differential scanning calorimetry (DSC) as well as the consistency of these methods to decide which species should be listed for production of energy and charcoal, comparing them with the carbonization gravimetric yield obtained from carbonization in laboratory muffle. For analysis by DSC and TGA, sawdust samples were heated at a rate of 10°C min-1 in nitrogen atmosphere, at a flow rate of 50 ml min-1 until final temperature of 600°C. The values of basic density and higher calorific value of the wood were determined. The carbonizations were conducted in laboratory muffle at a rate of 50 °C hour-1 to a maximum temperature of 450°C to give the charcoal yields. The values of coal apparent density from the eight species after carbonization were also determined. The results of the thermal analysis showed the profiles of pyrolytic decompoistion of the wood and evidenced those more stable to thermal action. The behavior of thermal stability of the wood of the eight species was confirmed by analysis of the yields of carbonization in muffle, compared to analysis by DSC and TGA. Woods of Aspidosperma pyrifolium and Mimosa tenuiflora showed higher thermal stability, thus higher yields in charcoal, as well as higher apparent densities. The thermogravimetry techniques and differential scanning calorimetry are satisfactory for evaluation of wood thermal decomposition and ensure consistency in the choice of woods that result in higher yields and higher quality charcoal.
机译：本研究的目的是使用热重试剂（TGA）技术和差示扫描量热法（DSC）来评估八种物种的木材热分解的轮廓以及这些方法的一致性，以确定应列出哪些物种进行生产能量和木炭，将它们与从实验室Muffle中的碳化获得的碳化重量产率进行比较。为了通过DSC和TGA分析，在氮气氛中以10℃MIN-1的速率加热锯末样品，流速为50mL min-1直至最终温度为600℃。确定了木材基本密度和较高热值的值。碳化在实验室的消除炉中以50℃-1至1至450℃的最高温度进行的速率进行，得到木炭产率。还测定了碳化后八种物种的煤表观密度的值。热分析的结果显示了木材的热解型解波的曲线，并证明了那些对热动作更稳定的结果。通过分析DSC和TGA的分析，通过分析Muffle中碳化的产量来确认八种树木的热稳定性的行为。 Aspidosperma pyrifolium和Mimosa tenuiflora的森林显示出较高的热稳定性，因此炭的产量较高，以及更高的表观密度。热重率技术和差示扫描量热法令人满意，用于评估木材热分解，确保在树木的选择中的一致性，导致产量更高，质量更高的木炭。

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