| Summary: | 碩士 === 義守大學 === 化學工程學系暨生物技術與化學工程研究所 === 105 === In this study, etherification of glycerol (G) with tert-butyl alcohol (TBA) was carried out to synthesize products used as an oxygenated fuel additive. Aluminium sulfate and Bismuth(III) trifluoromethanesulfonate, two types of solid inorganic acid catalysts were used in the experiment, respectively. The reaction was performed in a batch type reactor or a semi-continuous batch type reactor with pump feeding. Several factors affecting the etherification results (such as gasoline, diesel and heavy oil product profile) were investigated including reaction temperature, initial molar ratio of G/TBA, amount of catalyst. The results indicated that optimum yield of gasoline and diesel was at the reaction temperature of 240℃,initial molar ratio of G/TBA=1/2, reaction time of 4 hours, catalyst amount based on 10 wt% of initial feed. Under this reaction condition, 89% conversion of glycerol was observed to produce the least heavy oil. Similar results was found for the semi-continuous batch type reactor. For Bismuth(III) trifluoromethanesulfonate catalyst, the optimum reaction conditions were at the reaction temperature of 240℃, initial molar ratio of G/TBA=1/2, catalyst amount based on initial feed of 2 wt% , and reaction time of 2 hours. In this work, GC and TG were used for oil product analysis. Solid state –NMR, XPS, and SEM-EDS were used for catalyst characterization. The deactivation and regeneration of Aluminium sulfate catalyst as well as the recycle of Bismuth(III) trifluoromethanesulfonate were also investigated.
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