摘要
为减少制备负载型催化剂的繁复步骤,以磷酸钠做催化剂,采用酯交换法进行了利用餐饮废油制备生物柴油的研究.结果表明,在n(醇)∶n(油)=10∶1、催化剂加入量为油质量的3%、反应温度为70℃、反应时间为3h的条件下,其酸值可达到0.82mg/g,即酯化率为80.12%.气相色谱分析结果表明,制备的生物柴油以棕榈酸甲酯、亚油酸甲酯和油酸甲酯等为主要成分,符合柴油替代品的要求.与硫酸铁作为催化剂制备生物柴油比较,磷酸钠具备用量低、反应时间短、酯化率高等优点.
In order to make waste cooking oil into biodiesel and reduce supported catalyst steps,sodium phosphate as catalyst was developed for producing biodiesel by transesterification. Single factor and orthogonal experiments were used to investigate the effect of esterification on acid value reduction of waste cooking oil. The results show that the optimal esterification process conditions were methanol to oil malar tatio 10 ： 1, account for 3% of the oil weight for the amount of catalyst, reaction temperature 70℃ ,reaction time 3 h. Under the condition,the acid value can reach 0.82 mg/g and the esterification rate is 80.12%. Main composition of fatty acid methyl ester from waste cooking oil were methyl palmitate, methyl linoleate, methyl oleate, methyl linolenate and eighteen alkyl methacrylate, similar to that produced from plant oil,and can meet the requirement of diesel substitute. Comparing with Fe2（SO4）3 preparation of biodiesel, sodium phosphate is not only lower dosage but also shorter reaction time and higher esterification rate.
出处
《东北师大学报（自然科学版）》
CAS
CSCD
北大核心
2015年第3期137-142,共6页
Journal of Northeast Normal University(Natural Science Edition)
基金
国家自然科学基金资助项目(50978050
51278093)
吉林省科技发展计划项目(20110406)
关键词
磷酸钠
餐饮废油
酯化
气相色谱
生物柴油
sodium phosphate
waste cooking oil
esterification
gas chromatography
biodiesel
