玉米粉炭基固体酸催化制备生物柴油研究

摘要

以炭化-磺化方法制备的玉米粉炭基固体酸为催化剂，催化油酸与甲醇反应制备生物柴油，并考察了反应温度、催化剂用量、醇酸摩尔比、反应时间对油酸转化率的影响。结果表明，最优的反应条件为反应温度 bt，催化剂用量7％（与油酸质量比），醇酸摩尔比10∶1，反应时间10 h，并以此条件进行反应，油酸转化率达到91．07％。通过GC-MS 对产品进行分析，该工艺所得产品中甲酯含量为92．20％。%Biodiesel was synthesized from the esterification of oleic acid and methanol using maize starch carbon-based solid acid prepared by the method of carbonization-sulphonation from maize starch as the catalyst.The influence of reaction temperature,catalyst amount,methanol to oleic acid molar ratio and re-action time on the conversion of oleic acid was investigated.The result showed that the optimal reaction conditions were determined as follows:reaction temperature of bt,catalyst dosage of 7%(based on oleic acid weight),methanol to oleic acid molar ratio of 1 0∶1 ,reaction time of 1 0 h.Under the optimal reaction conditions,the conversion of oleic acid reached 91 .07%.The characterization of biodiesel by GC-MS in-dicated that the 92.20% of the product through the process were methyl ester.