...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Waste and biomass valorization >Kinetic Parameters Determination of Biomass Pyrolysis Fuels Using TGA and DTA Techniques
【24h】

Kinetic Parameters Determination of Biomass Pyrolysis Fuels Using TGA and DTA Techniques

机译：TGA和DTA技术测定生物质热解燃料的动力学参数

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

A TG/DTG and DTA measurements are used to determine the kinetics of the thermal decomposition of two Egyptian biomasses (sugarcane bagasse and cotton stalks powders) at three heating rates of 10, 15 and 20 ℃/min. Two distinct reaction zones were observed for the two biomasses. The direct Arrhenius plot method and integral method were applied to (TG/DTG) analysis for determination of kinetic parameters: activation energy, pre-expo-nential factor, and order of reaction. The weight loss curve showed that pyrolysis of sugarcane bagasse and cotton stalks took place mainly in the range of 200-500 ℃. Also, the activation energy of a phase transition can be calculated directly from the DTA thermogram of each biomass material. Heating rates had little effect on the pyrolysis process, but the peak of the weight loss rate in the DTG curves shifted towards higher temperature with heating rate. The activation energy of the sugarcane bagasse powder obtained by the direct Arrhenius plot method are 48.25, 57.15 and 45.35 kJ/mol for the heat rate of 10, 15 and 20 ℃/min, respectively. On the other side, the integral method shows larger values of the activation energy for sugarcane bagasse (82.5, 78.5 and 56.7 kJ/mol for the heat rate of 10, 15 and 20 ℃/min, respectively). The activation energy of the cotton stalks powder obtained by the direct Arrhenius plot method are 100, 80 and 68 kJ/mol for the heat rate 10, 15 and 20 ℃/min, respectively, but the integral method shows larger values of activation energy (100, 107 and 101 kJ/mol for the heat rate of 10, 15 and 20 ℃/min, respectively). The calculated activation energy by DTA analysis was found to be 81.77 and 84.75 kJ/mol for sugarcane bagasse and cotton stalks, respectively. These values are, to some extent, in agreement with the data obtained by direct and integral methods. The cotton stalks are more reactive than the sugarcane bagasse.
机译：TG / DTG和DTA测量用于确定两种埃及生物质（蔗糖蔗渣和棉秆粉）在10、15和20℃/ min三种加热速率下的热分解动力学。对于两种生物质观察到两个不同的反应区。将直接Arrhenius绘图法和积分法应用于（TG / DTG）分析，以确定动力学参数：活化能，预指数因子和反应顺序。失重曲线表明，甘蔗渣和棉秆的热解主要发生在200-500℃范围内。而且，可以直接从每种生物质材料的DTA热分析图计算出相变的活化能。加热速率对热解过程几乎没有影响，但是DTG曲线中失重速率的峰值随加热速率向较高温度移动。通过直接阿伦尼乌斯作图法得到的甘蔗渣粉末的活化能在10、15和20℃/ min的加热速率下分别为48.25、57.15和45.35 kJ / mol。另一方面，积分法显示甘蔗渣的活化能值较大（加热速率为10、15和20℃/ min时分别为82.5、78.5和56.7 kJ / mol）。直接Arrhenius图法获得的棉梗粉的活化能在10、15和20℃/ min的加热速率下分别为100、80和68 kJ / mol，但积分法显示出较大的活化能值（ 100、107和101 kJ / mol，加热速率分别为10、15和20℃/ min。通过DTA分析计算得出的甘蔗渣和棉秆的活化能分别为81.77和84.75 kJ / mol。这些值在某种程度上与通过直接和积分方法获得的数据一致。棉秆比甘蔗渣更活泼。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号