摘要
在自行设计的反应装置中,采用吡啶硫酸氢盐离子液体为催化剂,以硬脂酸和异戊醇为原料,对硬脂酸异戊酯的制备及其低温流动性能进行了研究。结果表明:最佳反应条件为醇酸摩尔比7∶1、反应时间30 min、催化剂用量7%、反应温度90℃,在此反应条件下转化率为98. 34%;硬脂酸异戊酯的凝点为9℃,冷滤点为13℃,运动黏度为3. 55 mm2/s,与硬脂酸甲酯相比,凝点下降了22℃,冷滤点下降了20℃,运动黏度降低了40. 44%。故采用异戊醇代替甲醇可有效降低生物柴油的凝点和冷滤点,改善生物柴油的低温流动性能。
In the self-designed reaction device,isoamyl stearate was produced by stearic acid and isoamyl alcohol using pyridine bisulfate ionic liquid as catalyst,and the low -temperature fluidity was studied.The results showed that the optimal reaction conditions were obtained as follows:molar ratio of isoamyl alcohol to stearic acid 7:1,reaction time 30min,catalyst dosage 7% and reaction temperature 90℃.Under these conditions,the conversion rate was 98.34%.The freezing point,cold filter point and the kinematic viscosity of isoamyl stearate were 9,13℃and 3.55mm^2/s,respectively.Compared with methyl stearate,the freezing point decreased by 22℃,the cold filter point decreased by 20℃,and the kinematic viscosity decreased by 40.44%.Therefore,using isoamyl alcohol instead methanol could effectively reduce the freezing point and cold filter point and improve the low -temperature fluidity of biodiesel.
作者
王文超
李法社
李瑛
倪梓皓
WANG Wenchao;LI Fashe;LI Ying;NI Zihao(School of Metallurgical and Energy Engineering,Kunming University of Science and Technology,Kunming 650093,China;Metallurgical Energy Conservation Engineering Research Center of the Ministry of Education,Kunming University of Science and Technology,Kunming 650093,China)
出处
《中国油脂》
CAS
CSCD
北大核心
2018年第12期105-108,113,共5页
China Oils and Fats
基金
国家自然科学基金项目(51766007)
NSFC云南联合基金项目(U1602272)
云南省自然科学基金项目(2015FB128)
云南省自然科学基金项目(2018FB092)
省部共建复杂有色金属资源清洁利用国家重点实验室自设项目(CNMRCUTS1704)
关键词
生物柴油
硬脂酸异戊酯
离子液体
催化制备
低温流动性
biodiesel
isoamyl stearate
ionic liquid
catalytic preparation
low-temperature fluidity
