不同介质条件下竹材的液化反应动力学  

Kinetics of bamboo liquefaction with different solvents

作　　者：刘晓欢[1] 傅深渊[1] 宗恩敏[2] 叶艳艳[1] 章彧[1] 罗亚琴[1] 

机构地区：[1]浙江农林大学工程学院,浙江临安311300 [2]南京大学环境学院,江苏南京210093

出　　处：《应用化工》2010年第12期1852-1856,共5页Applied Chemical Industry

基　　金：浙江省科技厅重大专项项目(2007C12018);2009浙江省研究生创新科研基金资助项目(YK2009072)

摘　　要：采用非等温差热分析(DTA)技术,分析了竹材在苯酚和酚油介质条件下液化反应动力学的影响。运用Kissinger方程在不同的升温速率下进行动力学研究,并由动态DTA曲线求出固化反应动力学参数,进而建立体系的液化反应动力学模型。实验结果表明,苯酚竹材液化体系(PLB)和酚油竹材液化体系(POLB)反应级数分别为0.905 9和0.950 5,平均活化能分别为68.95 kJ/mol和105.43 kJ/mol,指前因子分别为4.08×104s-1和8.91×104s-1;两者的反应级数较为接近,说明PLB和POLB的液化反应模式基本相同;与POLB相比,PLB液化体系液化能耗和液化温度相对较低。由外推法得出竹材液化反应最佳工艺为:液化介质为苯酚,初始液化温度为70.4℃,液化峰高温为110.5℃,液化峰终温为126.8℃。DTA technology was used to study the liquefaction kinetics with different solvents.The liquefaction reaction kinetic parameters of the two kinds of solvents were alculated based on the results of the dynamic DTA curves.DTA analysis showed that the reaction order were 0.905 9 and 0.950 5,the average activation energy were 68.95 kJ/mol and 105.43 kJ/mol,and the preexponential constant were 4.08×104 s-1 and 8.91×104 s-1 for PLB and POLB respectively,PLB and POLB had almost same model of liquefaction reaction because the two kinds of resins had almost same reaction order.The average activation energy of PLB was less than that of POLB,the PLB had lower liquefaction energy consumption and lower liquefaction temperature.The optimum liquefaction technology is that phenol is as solvent,initial liquefaction temperature is 70.4 ℃,peak temperature of liquefaction is 110.5 ℃ and final liquefaction temperature is 126.8 ℃.

关 键 词：竹材 液化动力学 DTA 介质 

分 类 号：TQ351[化学工程]