School of Chemistry and Materials Science, Ludong University, Yantai 264025, PR China.
Bioresour Technol. 2012 Apr;110:258-63. doi: 10.1016/j.biortech.2012.01.115. Epub 2012 Jan 28.
Esterification of oleic acid with ethanol catalyzed by organophosphonic acid-functionalized silica SG-T-P was optimized using response surface methodology (RSM). The interactive effect of catalyst to FFA weight ratio and molar ratio of alcohol to acid were more significant than that of reaction temperature. The optimum values for maximum conversion ratio obtained by a Box-Behnken center-united design reached 77.02±0.62% when the reaction was carried out at 112°C for 10h with a molar ratio of alcohol to oleic acid of 8.8:1 and a content of 14.5wt.% triethylenetetramine bis(methylene phosphonic acid)- functionalized silica catalyst SG-T-P. The research results show that SG-T-P is a potential catalyst for biodiesel production that can adsorb water from the reaction mixture at the same time.
采用响应面法（RSM）对有机膦酸功能化二氧化硅 SG-T-P 催化油酸与乙醇的酯化反应进行了优化。催化剂与游离脂肪酸重量比和醇酸摩尔比的交互作用比反应温度的影响更为显著。通过 Box-Behnken 中心联合设计得到的最佳转化率最大值为 77.02±0.62%，在 112°C 下反应 10h，醇酸摩尔比为 8.8:1，三乙烯四胺双（亚甲基膦酸）-功能化二氧化硅催化剂 SG-T-P 的含量为 14.5wt.%。研究结果表明，SG-T-P 是一种潜在的生物柴油生产催化剂，同时可以从反应混合物中吸附水。
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