ABSTRACT

Waste sunflower oil (WSO) can be easily produced as a reliable resource sustainable for multifunctional applications. WSO methanolysis in the presence of high silica zeolite beta (HSZB) treated with KOH as a catalyzer in a trans-esterification reaction was used for the fatty acid methyl ester (FAME) synthesis. Tetrahydrofuran (THF) as a co-solvent of 20 wt.% was added for mass transfer intensification. Conversion efficiency of 96.5% was obtained within 4 h reaction time of the reflux reaction, methanol:oil ratio of 9:1, 2 wt.% of catalyst and agitation speed of 300 rpm. Furthermore, these KOH treated HSZB catalysts still exhibit acceptable sustainability and appropriate catalysis in the trans-esterification after three consecutive cycling. It is concluded that K₂O existing in the pores and the defect sites of the alkali-treated HSZB can be supplied to the surface of the catalysts structure during the trans-esterification in three consecutive rounds to result in 66.3% percentage of conversion.

摘要

葵花籽油（WSO）可以很容易地作为一种可靠的资源生产出来，可用于多功能应用。在酯交换反应中用KOH作为催化剂处理的高硅沸石β（HSZB）存在下的WSO甲醇分解用于脂肪酸甲酯（FAME）的合成。加入四氢呋喃（THF）作为20重量％的助溶剂用于传质强化。在回流反应的4小时反应时间内，甲醇：油的比例为9∶1，催化剂的2重量％，搅拌速度为300rpm，转化率为96.5％。此外，这些经过KOH处理的HSZB催化剂在连续三个循环后的酯交换反应中仍显示出可接受的可持续性和适当的催化作用。结论是K ₂可以在酯交换过程中连续三轮将存在于碱处理过的HSZB的孔和缺陷部位中的O供给到催化剂结构的表面，以实现66.3％的转化率。