不同催化剂条件下毛竹材液化反应动力学研究  

Kinetics of Moso bamboo liquefaction with different catalysts

作　　者：傅深渊[1,2] 程书娜[1] 赵广杰[2] 

机构地区：[1]浙江林学院木材科学与技术学院 [2]北京林业大学材料科学与技术学院

出　　处：《北京林业大学学报》2008年第6期119-123,共5页Journal of Beijing Forestry University

基　　金：浙江省科技厅重点项目(2005C22065);浙江省科技厅重大专项项目(2007C12018)

摘　　要：为了筛选出高效液化竹材催化剂,达到竹材温和条件下液化,该文利用等温差示热量扫描曲线方法,分析了不同催化剂（KCl和K2CO3）对毛竹材液化剂苯酚液化反应的影响。在20~300℃温度范围内,运用Kissinger方程在不同的升温速率（5、10、15和20℃/min）下进行动力学研究。结果表明：竹材液化反应是吸热反应;随着升温速率的增加,特征液化温度向高温方向移动;不同催化剂（K2CO3、KCl、无催化剂）条件下竹材液化反应表观活化能依次是45.95、59.99、58.00 kJ/mol,可见K2CO3适合做竹材液化的催化剂。由外推法得出竹材液化反应最佳工艺为：催化剂为K2CO3,初始液化温度为69.1℃,液化峰高温度为97.3℃,液化峰终温度为111.9℃。In order to find a kind of high efficiency catalyst which can make bamboo liquefied more easily than some common catalysts, different scanning calorimetry （DSC） was used to study the kinetics of phenol/Moso bamboo liquefaction with different catalysts. The kinetics analysis was performed by means of Kissinger method, at beating rates of 5, 10, 15 and 20℃/min between 20 and 300℃. DSC analysis showed that the reaction of Moso bamboo liquefaction was absorptive; the peak curing temperature Tp all increased with the increase of heating rate; the activation energy of bamboo liquefaction with different catalysts （potassium carbonate, potassium chloride, no catalyst） were 45.95 , 59.99 and 58.00 kJ/mol, respectively. Therefore, potassium carbonate is suitable for catalyzing bamboo liquefaction. The optimum curing technology is that potassium carbonate is catalyst, initial liquefaction temperature 69.1%, peak temperature of liquefaction 97.3℃ and final liquefaction temperature 111.9℃.

关 键 词：毛竹 等温差示热量扫描 催化剂 液化动力学 

分 类 号：TQ351[化学工程]