Pd/C上松香催化加氢反应动力学  

Kinetic Study for Catalytic Hydrogenation of Rosin over Pd/C

作　　者：陈少芳[1,2] 冉启斌 陈小鹏[1] 王琳琳[1] 阳承利[1] 梁杰珍[1] 

机构地区：[1]广西大学化学化工学院,广西南宁530004 [2]广西梧州日成林产化工股份有限公司,广西梧州543100

出　　处：《林产化学与工业》2013年第2期103-107,共5页Chemistry and Industry of Forest Products

基　　金：国家自然科学基金(31060102);广西自然科学基金重点项目(2011GXNSFD018011);广西科技攻关项目(1099060-2)

摘　　要：以脂松香为原料,改性Pd/C为催化剂和200号油为溶剂进行松香催化加氢反应的研究。采用改进搅拌器类型、加入200号溶剂油、提高搅拌速度大于600 r/min和改变催化剂粒径为10～20μm的方法消除加氢过程中内外扩散的影响,利用DB-5毛细管气相色谱法在线采样跟踪分析在压力为5 MPa、温度为403～433 K条件下反应体系组成随时间的变化关系,对松香主要成分枞酸加氢反应过程进行拟均相动力学研究。结果表明,松香催化加氢的反应速率与枞酸浓度呈一级反应,其动力学方程为r=1.13×105exp(-5.904×103/T)C1,活化能为4.909×104 J/mol。Catalytic hydrogenation of rosin was studied with rosin as raw material, modified Pd/C as catalyst and oil No. 200 as solvent. The effects of internal and external diffusion were eliminated by improving the type of stirrer, adding solvent oil No. 200, raising rotational speed to more than 600 r/min and reducing granularity of catalyst at 10-20 μm. The changes of components with reaction time were traced on-line at temperature 403 K to 433 K and pressure 5 MPa by capillary gas chromatography. The pseudo-homogeneous reaction kinetics of catalytic hydrogenation of rosin was studied. The result shows that the reaction velocity of catalytic hydrogenation of rosin is the first order with respect to abietic acid concentration. The intrinsic kinetic equation is r=1.13×10^5exp（-5.904×10^3/T）C1 and the activation energy is 4.909 × 10^4 J/mol.

关 键 词：松香 PD C 催化加氢 反应动力学 

分 类 号：TQ35[化学工程] Q643.322[生物学—生物物理学]