摘要
为简化酯交换法制备生物柴油工艺过程,实现生物柴油绿色生产。采用正交试验的方法研究了Ba(OH)2催化酯交换反应制备生物柴油过程中油醇摩尔比、Ba(OH)2用量、反应温度、反应时间等因素对生物柴油转化率的影响,并将Ba(OH)2与KOH的催化效果进行了简单比较。实验结果显示:最佳的工艺条件为油醇摩尔比1:6、Ba(OH)2用量2%、反应温度60℃。在此条件下以大豆油为原料90min生物柴油转化率达到94.27%,花生油、亚麻油、菜籽油等相应转化率均超过95%,同时对比实验证明Ba(OH)2与KOH具有同样高的催化活性,反应产物成分相同,且Ba(OH)2可通过BaSO4沉淀的形式简单、完全回收。Ba(OH)2可作为一种有潜力的生物柴油制备催化剂。
In order to simplify the process of biodiesel preparation through transesterification and make the technique more environmental friendly, using Ba（OH）2 as the catalyst was studied in present work. The experiments were conducted using L9（3^4） orthogonal test, three kinds of factors which were the molar ratio of oil to methanol, amount of Ba（OH）2 and the reaction temperature were investigated. By statistical analysis, the optimal conditions for the reaction were obtained, that a 1：6 molar ratio of oil to methanol, 2.0% Ba（OH）2 catalyst and 60℃ reaction temperature, under these conditions a 94.27% conversion rate for soybean oil methyl ester was gained at 90min, and the conversion rate exceeded 95% while linseed oil, peanut oil and rapeseed oil were taken as the raw materials. In addition, the transesterification results catalyzed respectively by Ba（OH）2 and KOH were compared, the experimental results showed that the activity of Ba（OH）2 was as high as KOH, the main components of fatty acid methyl esters in the two kinds of biodiesel were identical, and Ba（OH）2 could be removed easily and completely by deposition and centrifugation. So Ba（OH）2 could be a promising candidate catalyst for biodiesel preparation.
出处
《农业工程学报》
EI
CAS
CSCD
北大核心
2008年第8期197-201,共5页
Transactions of the Chinese Society of Agricultural Engineering
基金
安徽农业大学2007年度校长青年基金项目(2007qnr19)
安徽省2008年度科技计划项目(08020304108)
关键词
生物柴油
酯交换反应
氢氧化钡
正交试验
biodiesel
transesterification
barium hydroxide
orthogonal test
