以固體酸性觸媒進行甘油與叔丁醇醚化反應

以磺酸碳化觸媒(HSR)進行甘油(Glycerol,GLY)與叔丁醇(Tert-Butanol,TBA)醚化反應的產物可用來當作柴油含氧添加劑。在高壓反應器內，固定實驗條件TBA/GLY莫耳比為4:1，時間為18小時，觸媒量為甘油的10 wt%，在不同操作溫度(90~200℃)探討其反應行為。當反應溫度為200℃時，甘油與叔丁醇醚化反應的產物明顯的形成油水分離，將油相產物進行蒸餾後以1：4的體積比例與高級柴油混合，測得高級柴油的十六烷指標(cetane index)由原本的50.1提升至52.6，藉此推估蒸餾後的油相產物有機會成為生質或石油含氧添加劑。

關鍵字

甘油；叔丁醇；醚化反應；含氧添加劑

並列摘要

The etherification of glycerol with tert-butanol on the sulfonated carbon catalyst (HS-R) provides a way to transform glycerol into a value added product to be used as an oxygenated additive to diesel fuels. With a 4:1 molar ratio of tert-butanol to glycerol, a 1:10 weight ratio of catalysts to glycerol, the etherification reaction glycerol with tert-butanol in an autoclave under autogenic pressures were performed over the reaction temperatures ranged from 363 K to 473 K at the reaction time of 18 hours. We found that under the reaction temperature (473 K), a separation of oil phase and water phase of the product mixture can be achieved. The distillated oil phase product of the product mixture can increase the cetane index 50.1 of the pure petroleum diesel to 52.6 of the mixture of a 1:5 volume ratio of the distillated oil phase product to the pure petroleum diesel. Therefore, the distillated oil phase product can be a candidate of oxygenate additive for diesels (bio or petroleum).

並列關鍵字

glycerol ； tert-butanol ； etherification ； oxygenated additive

參考文獻

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[8] Klepačova, K.; Mravec, D.; Bajus, M. Tert-Butylation of Glycerol Catalysed by Ion-exchange Resins. Appl. Catal. A: Gen. 2005, 294, 141.

[9] Karinen, R. S.; Krause, A. O. I. K. New Biocomponents from Glycerol. Appl. Catal. A: Gen. 2006, 306, 128.

國際替代計量

以固體酸性觸媒進行甘油與叔丁醇醚化反應

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