共溶剂THF对超临界甲醇连续化制备生物柴油的影响  

Co-solvent THF effect on continuous production of biodiesel from soybean oil using supercritical methanol

作　　者：周诚[1] 王存文[1] 王为国[1] 喻发全[1] 吴元欣[1] 池汝安[1] 

机构地区：[1]武汉工程大学绿色化工过程省部共建教育部重点实验室,湖北武汉430074

出　　处：《武汉工程大学学报》2010年第1期22-25,共4页Journal of Wuhan Institute of Technology

基　　金：国家自然科学基金(20576105);湖北省自然科学基金重点项目(2008CDA024);武汉市学科带头人计划项目(200851430490)

摘　　要：在直径φ20mm、长3700mm的垂直管式反应器中研究了共溶剂四氢呋喃（THF）对超临界甲醇连续化制备生物柴油体系中的反应中间产物组成及甲酯收率的影响；反应温度，反应压力，醇油摩尔比分别为275～375℃，15MPa，40：1．结果表明：较低的温度下，共溶剂四氢呋喃加入反应体系后，生物柴油的收率有显著的提高．由此可推论在较低温度下，表明醇油未完全混合均匀．加入共溶剂后，改善了醇油的混合情况，使得甲酯收率明显提高．实验还发现，当在高温下，甲酯收率出现极大点，原因可能是甲酯的消耗速率大于其生成速率，加入共溶剂后，反应速率加快，与不加共溶剂时相比，中间产物浓度在很短时间内就达到平衡．In this paper a study has been carried out in a vertical tube reactor with the length of 3 700 mm and the diameter of 20 mm at 275--375 ℃ and 15 MPa, and the molar ratio of 40 ： 1 of methanol to soybean oil. The effect of tetrahydrofuran（THF） on intermediate product and methyl ester yield were studied. The results showed that co-solvent THF had a significant impact on the reaction and methyl ester increased. It deducted that at a lower temperature, the methanol and oil is not completely mixed into one phase. Added co-solvent THF improved the mixing, so the methyl ester increased. The study also found that the methyl ester yield had a great point, the reason was the consumption rate of methyl ester is greater than the reaction rate of methyl ester at high temperature. Added co-solvent accelerated the reaction rate, compared to without co-solvent, the concentration of intermediate products reached equilibrium in a short time after adding co-solvent.

关 键 词：超临界甲醇 生物柴油 垂直管式反应器 中间产物 共溶剂 

分 类 号：O623[理学—有机化学]