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首页> 外文期刊>Fuel >Transesterification Of Vegetable Oil To Biodiesel Fuel Using Acid Catalysts In The Presence Of Dimethyl Ether
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Transesterification Of Vegetable Oil To Biodiesel Fuel Using Acid Catalysts In The Presence Of Dimethyl Ether

机译：在二甲基醚存在下使用酸催化剂将植物油酯交换为生物柴油燃料

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摘要

The immiscibility of methanol and vegetable oil leads to a mass-transfer resistance in the transesterification of vegetable oil. To overcome this problem, dimethyl ether (DME) was used as an environmentally friendly cosolvent to produce a homogeneous solution. Methylesterifkations of corn oil in both the presence and the absence of DME were performed using p-toluenesulfonic acid (PTSA), benzenesulfonic acid and sulfuric acid. PTSA showed highest catalytic activity. The yield of FAME reached 97.1% when 4 wt% of PTSA based on the oil weight was used at 80℃ with a reaction time of 2 h in the presence of DME. The obtained biodiesel was composed of methyl palmitate (9.1 wt%), methyl oleate (33.9 wt%), methyl lino-leate (53.5 wt%), methyl linolenate (3.0 wt%) and methyl arachidate (0.5 wt%), and it was similar to the biodiesel compositions from corn oil as reported. The effects of concentrations of FFA and water on FAME yields were also investigated. All results suggested that the reaction rate was greatly improved by the addition of DME to the reaction system.
机译：甲醇与植物油的不混溶性导致植物油酯交换反应中的传质阻力。为了克服这个问题，使用二甲醚（DME）作为环境友好的助溶剂来生产均匀的溶液。使用对甲苯磺酸（PTSA），苯磺酸和硫酸在有和没有DME的情况下对玉米油进行甲基酯化。 PTSA显示出最高的催化活性。当在DME存在下，在80℃下使用基于油重量的4 wt％的PTSA，反应时间为2 h时，FAME的收率达到97.1％。得到的生物柴油由棕榈酸甲酯（9.1重量％），油酸甲酯（33.9重量％），亚麻酸甲酯（53.5重量％），亚麻酸甲酯（3.0重量％）和花生四烯酸甲酯（0.5重量％）组成。与报道的玉米油中的生物柴油成分相似。还研究了FFA和水的浓度对FAME产量的影响。所有结果表明，通过向反应体系中添加二甲醚可以大大提高反应速率。

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