Etherification of Biodiesel-Based Glycerol with Bioethanol over Tungstophosphoric Acid To Synthesize Glyceryl Ethers

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• 作者：Zhenle Yuan ; Shuixin Xia ; Ping Chen ; Zhaoyin Hou ; Xiaoming Zheng
• 刊名：Energy & Fuels
• 出版年：2011
• 出版时间：July 21, 2011
• 年：2011
• 卷：25
• 期：7
• 页码：3186-3191
• 全文大小：774K
• 年卷期：v.25,no.7(July 21, 2011)
• ISSN：1520-5029

文摘

Etherification of biodiesel-based glycerol with bioethanol was investigated over a series of catalysts. The etherification of glycerol performed on acid catalysts, such as H-ZSM5, H-尾, tungstophosphoric acid (HPW), FeCl₃, AlCl₃, and H₂SO₄, was found. Basic catalysts (such as alkaline earth oxides, MgO) are inactive for the reaction. Bulk HPW and SiO₂-supported HPW catalysts exhibited the highest activity among the tested catalysts, with a 97.1% conversion of glycerol. Over the HPW catalyst, the etherification reactions were carried out at different temperatures, varied ratios between ethanol and glycerol, different catalyst amounts, and different reaction times. The SiO₂-supported HPW catalyst has a high initial activity, but it deactivated gradually because of the leaching of HPW.