纳米催化剂KF/γ-Al_2O_3的制备及催化乌桕籽油制备生物柴油  

Preparation of KF/γ-Al_2O_3 nanocatalyst and its catalysis in the preparation of biodiesel from stillingia oil

作　　者：卞庆贵[1] 胡明敏[1] 田建利[1] 王运[1] 文利柏[1] 韩鹤友[1] 郑新生[1] 

机构地区：[1]华中农业大学理学院,湖北武汉430070

出　　处：《应用化工》2007年第12期1197-1200,共4页Applied Chemical Industry

基　　金：湖北省科技攻关课题(4006-066035);华中农业大学创新基金(52204-05081)

摘　　要：以γ-Al2O3为载体负载KF，制备纳米KF／γ-Al2O3酯交换催化剂，用于催化乌桕籽油制备生物柴油，研究了不同制备条件下纳米催化剂KF／γ-Al2O3的催化性能。结果表明，当KF·2H2O的用量为18g，共混反应温度为65℃，煅烧温度为300℃，煅烧时间为2．5h时，酯化率可达90％以上。TG—DSC热分析表明，催化剂具有较好的热稳定性，温度高于400℃时，会产生晶相转移现象使催化剂活性点有所减少；通过SEM、TEM表征，催化剂表面呈多孔状，颗粒大小在50—100nm，是一类纳米固体碱催化剂。In this paper the preparation of biodiesel from Stillingia oil by transesterification i using KF/γ-Al2O3 as solid nanocatalyst. We studied the activity of nano meter KF/γ-Al2O3 der the different preparation conditions. The results revealed that at the dosage of KF·2H2O s investigated catalysis un18 g,the reaction temperature 65 ℃, the calcination temperature 300 ℃, the calcination time 2.5 h, the efficiency of transesterification was above 90%. TG-DSC analysis showed that the catalyst has good thermal stability. If the temperature went over 400 ℃ ,the phenomenon of crystal phase transfer would appear and this wiU decrease the active points. The SEM and TEM spectrum show that the catalyst has a porous structure in 50 -100 nm and is a nanometer solid alkali.

关 键 词：纳米催化剂 KF/Γ-AL2O3 乌桕籽油 生物柴油 

分 类 号：TQ646.1[化学工程—精细化工]