固体碱催化沉香籽油制备生物柴油的研究

沉香籽在南方资源量大,内含油脂丰富,其中C18组分高达80.4%,在我国能源短缺的大背景下具有重要的开发意义。本研究自制负载型固体碱催化剂KF/CaO用于催化沉香籽油进行酯交换反应制备脂肪酸甲酯类生物柴油。通过表征发现催化剂KF/CaO微观呈多层片状结构,比表面积为107±0.5 m2/g,碱强度H_=15.0~18.4。通过酯交换反应发现KF/Ca O催化剂具有较好的催化效果,酯交换转化率达到98.7%,能够保持高转化率重复使用3次。生物柴油产品主要指标符合GB/T 20828-2014的要求,红外谱图显示符合脂肪酸甲酯官能团的特征。

Preparation of biodiesel by solid base catalyst Aquilaria sinensis seed oil

It has a abundant resources of Aquilaria sinensis seed in the south of China,and the seed contains rich oils, C18 of which were as high as 80.4%.Under the background of our country energy shortage,developing Aquilaria sinensis seed oil has big significance.This study homemade load type solid alkali catalyst of KF/CaO used for catalytic Aquilaria sinensis seed oil to prepare biodiesel by the reaction of transesterification.Through characterization of catalyst founding that the KF/CaO is multi-layer sheet structure,specific surface area is 107 ±0.5 m2/g and alkali strength H_=15.0 ~18.4.Founding by ester exchange reaction,KF/CaO catalysts have good catalytic effect,conversion rate reached 98.7%,is able to maintain a high conversion rate repeated use three times.The key indicators of biodiesel product con-form to the requirements of GB/T 20828-2014.FT-IR spectra show that it conforms to the functional groups character-istic of the fatty acid methyl ester.