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URN etd-0831111-102352 Statistics This thesis had been viewed 2174 times. Download 1638 times. Author Li-Chun Cheng Author's Email Address No Public. Department Chemical Engineering Year 2010 Semester 2 Degree Master Type of Document Master's Thesis Language zh-TW.Big5 Chinese Page Count 111 Title Etherification of Glycerol with Methanol to Produce a New Oxygenate Additive for Diesels Keyword Etherification Glycerol Methanol Oxygenate Additive Oxygenate Additive Methanol Glycerol Etherification Abstract The etherification of glycerol with methanol on solid acid catalysts provides a way to transform glycerol into a value added product to be used as an oxygenated additive to diesel fuels. Different types of acidic heterogeneous catalysts, including sulfonic resins, zeolites and sulfonated carbon catalyst are used for the synthesis of mono-, di- and tri- ethers of glycerol using methanol as the alcohol. The study shows that the performances of the catalysts are governed by both the acidity and the polarity of their surface. Among the testing catalysts, the sulfonated carbon catalyst (H-SR) attains a suitable average pore size, acid capacity, and adsorption capability of glycerol due to polarity of the surface forms the H-SR catalyst. With a 4:1 molar ratio of methanol to glycerol, a 1:10 weight ratio of catalysts to glycerol, a reaction temperature of 503 K at the reaction time of 24 hours, the conversion of glycerol (89%) and a combined yield of GDMEs and GTME of 46% are achieved for a batch operation. To achieve the target product of GDMEs and GTME mixture as a new oxygenate additive for diesels, one should improve the capability of the prepared catalyst as well as develop a more efficient green process and separation. Advisor Committee Jyh-Shyong Chang - advisor
Tse-Chuan Chou - co-chair
Tzong-Rong Ling - co-chair
Files Date of Defense 2011-07-25 Date of Submission 2011-08-31