| Summary: | 碩士 === 南台科技大學 === 化學工程與材枓工程系 === 97 === This research studied applications of polymer-support catalyst in oxidative desulfurization reaction. The polymer support was synthesized by producing polymer particles through the polymerization of divinyl benzene and glycidyl methacrylate (GMA) and, subsequently, surface modification using iminodiacetic acid (IDA) as a strong chelating reagent. As illustrated in the result of FTIR, IDA modified the functional groups, e.g. hydroxyl, benzyl and carbonyl groups, of GMA. Then, cobalt ion was chelated on the polymer support. The Atomic Absorption result (AA) showed the amount of the cobalt(II) chelated was 89.89 mg Co2+/g.
To study the applications of polymer catalysts, they were used to remove the sulfur compounds, especially 4,6-dimethyldibenzothiophene (4,6-DMDBT), in diesel oil. The catalysts not only had greatly effective on the oxidation of benzaldehyde, which can further oxidized sulfur compounds in diesel oil, but also had recyclable performance and high selectivity. The polymer catalysts were conducted to apply in the oxidative desulfurization reaction of 4,6-DMDBT under O2/benzaldehyde system. The result showed the conversion of 4,6-DMDBT in model diesel oil was higher than 99%. Comparing to H2O2/acetic acid system, the performance of O2/benzaldehyde system was much higher than that of H2O2/acetic acid system. The oxidation reaction of O2/benzaldehyde system finished within 30 min at temperature over 50oC. At temperature under 40oC, the oxidation reaction was ended within 3 hours.
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