以地沟油生物柴油为对象,利用热分析仪与傅里叶红外分析仪联用对地沟油生物柴油热裂解行为进行实验研究。实验结果表明:地沟油生物柴油的热裂解分为3个阶段,即:小分子低沸点组分挥发阶段、脂肪酸甲酯挥发和热裂解阶段、地沟油生物柴油...以地沟油生物柴油为对象,利用热分析仪与傅里叶红外分析仪联用对地沟油生物柴油热裂解行为进行实验研究。实验结果表明:地沟油生物柴油的热裂解分为3个阶段,即:小分子低沸点组分挥发阶段、脂肪酸甲酯挥发和热裂解阶段、地沟油生物柴油的碳化阶段。随着升温速率的增大,地沟油生物柴油的热裂解反应向高温区移动,最大失重速率由7.1%/min增至47.1%/min。地沟油生物柴油的热裂解动力学分析具有分段特征,在不同反应阶段动力学参数差别较大,初始阶段活化能为103.76~193.89 k J/mol,中间阶段活化能为81.30~210.74 k J/mol。展开更多
Biodiesel is a kind of clean and renewable energy. The effect of ethanol addition on the flame characteristics of waste oil biodiesel is studied by using OH-PLIF technique from the perspective of OH radical evolution....Biodiesel is a kind of clean and renewable energy. The effect of ethanol addition on the flame characteristics of waste oil biodiesel is studied by using OH-PLIF technique from the perspective of OH radical evolution. Ethanol addition leads to the appearance of diffusion flame reaction interface ahead of schedule and shortens the diffusion flame height. The experimental results show a linear correlation between the flame height and the fuel flow rate for a given fuel and oxidant. The same conclusion is drawn from the theoretical analysis of the approximate model. In addition. ethanol addition makes the average OH signal intensity of flame at different fuel flow rate tend to be consistent and the fuel flow rate enlarge where the flame field shows the strongest oxidation performance. Average OH signal intensity begins to weaken at larger fuel flow rate, which indicates that fuel flow rate of fuels blended with ethanol can change in larger range and does not significantly affect the uniformity of combustion.展开更多
文摘以地沟油生物柴油为对象,利用热分析仪与傅里叶红外分析仪联用对地沟油生物柴油热裂解行为进行实验研究。实验结果表明:地沟油生物柴油的热裂解分为3个阶段,即:小分子低沸点组分挥发阶段、脂肪酸甲酯挥发和热裂解阶段、地沟油生物柴油的碳化阶段。随着升温速率的增大,地沟油生物柴油的热裂解反应向高温区移动,最大失重速率由7.1%/min增至47.1%/min。地沟油生物柴油的热裂解动力学分析具有分段特征,在不同反应阶段动力学参数差别较大,初始阶段活化能为103.76~193.89 k J/mol,中间阶段活化能为81.30~210.74 k J/mol。
基金Project(51766007)supported by the National Natural Science Foundation of ChinaProject(U1602272)supported by the NSFC-Yunnan Joint Fund Project+1 种基金Project(2015FB128)supported by the Natural Science Fund Project in Yunnan Province,ChinaProject(CNMRCUTS1704)supported by the Research Fund from State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization,China
文摘Biodiesel is a kind of clean and renewable energy. The effect of ethanol addition on the flame characteristics of waste oil biodiesel is studied by using OH-PLIF technique from the perspective of OH radical evolution. Ethanol addition leads to the appearance of diffusion flame reaction interface ahead of schedule and shortens the diffusion flame height. The experimental results show a linear correlation between the flame height and the fuel flow rate for a given fuel and oxidant. The same conclusion is drawn from the theoretical analysis of the approximate model. In addition. ethanol addition makes the average OH signal intensity of flame at different fuel flow rate tend to be consistent and the fuel flow rate enlarge where the flame field shows the strongest oxidation performance. Average OH signal intensity begins to weaken at larger fuel flow rate, which indicates that fuel flow rate of fuels blended with ethanol can change in larger range and does not significantly affect the uniformity of combustion.
