炭基固体碱催化剂的制备和表征及性能研究  

Preparation of Biomass Carbon-based Solid Base Catalyst and Catalytic Activity for Transesterification

作　　者：朱成龙[1] 华平[2] 喻红梅[2] 李建华[2] 朱国华[2] 王灵光[2] 

机构地区：[1]南通大学纺织服装学院,江苏南通226019 [2]南通大学化学化工学院,江苏南通226019

出　　处：《化学试剂》2017年第8期801-805,共5页Chemical Reagents

基　　金：江苏省科技计划资助项目(BY2015047-12)

摘　　要：分别以葡萄糖、蔗糖、淀粉为载体,KOH为前驱体,采用一步碳化法制得3种固体碱催化剂。通过IR、XRD、SEM和TG-DSC等手段及Hammett指示剂法对催化剂进行了表征,并以三油酸甘油酯与甲醇酯交换反应为探针反应,比较了三者的催化活性。结果表明,3种催化剂均为无定形碳架结构,具有较好的热稳定性,在焙烧过程中均有K_2CO_3晶相生成。催化剂表面碱量与活性呈正相关性,在相同工艺条件下和KOH催化活性相当。Three kinds of carbon-based solid base catalysts were prepared by a one-step carbonization method with potassium hy- droxide as the precursor and glucose, sucrose, starch as raw materials. The catalysts were characterized by means of IR, XRD, SEM ,TG-DSC and Hammett indicator method.The transesterification of glycerol trioleate and methanol was taken as the probe re- action to compare the catalytic performance for the three kinds of carbon-based solid base catalysts.The results showed that three kinds of carbon-based solid base catalysts were all amorphous carbon structures and had good thermal stability.Potassium carbon- ate crystalline phase was formed on the carbon-based solid base catalysts during calcination process.The more basicity of the car- bon-based solid base catalysts,the better its catalytic activity.It was similar catalytic activity between biomass carbon-based solid base catalysts and potassium hydroxide at the same conditions.

关 键 词：炭基固体碱 酯交换反应 三油酸甘油酯 甲醇 表征 

分 类 号：O643[理学—物理化学]