不同催化剂条件下毛竹材液化反应动力学研究

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K2 CO3）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（K2 CO3、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K2 CO3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K2 CO3，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℃。 

Kinetics of Moso bamboo liquefaction with different catalysts

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 heating 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 Tp 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℃.