天然矿物存在下脂肪酸酯水解生烃的影响因素研究

在常压、低温条件下,检测了十种天然矿物存在下水的pH值变化、天然矿物经偏酸性和偏碱性水溶液浸泡后的物相组成;同时观察了十种天然矿物及其在不同(沉积环境)pH值时对脂肪酸酯的水解催化作用,得出脂肪酸酯在不同天然矿物存在下的水解率大小(由此可计算出生烃量).实验结果表明:十种天然矿物存在下可使偏酸性或偏碱性水的pH值发生变化,但天然矿物的物相组成在偏酸性或偏碱性水溶液浸泡后基本上不变;除了白云石和钙蒙脱石外,大多数天然矿物在偏碱性条件下对脂肪酸酯低温催化水解都是比较有利的;脂肪酸酯低温矿物催化水解的水解率范围在9%～50%,大多数集中在22%～34%范围.

Study on Factors Influencing Hydrocarbon Generation from Fatty Acid Ester by Hydrolysis with Natural Minerals

This study focuses on changes of pH value of water after adding ten kinds of natural minerals, and composition changes of natural minerals after dipping water of partial acidity or partial alkalescency.At the same time, the effect of ten type natural minerals and their dif ferent pH values on hydrolyzed catalysis on fatty acid has also been studied.The hydrolysis rates of fatty acid ester have been obtained by the presence of ten kinds of natural minerals.Our results show that different minerals will bring changes of pH value of paritial acidity or partial alkalescency, but the mineral components have not changed after dipping water of partial acidity or partial alkalescency. Many minerals except for dolomite and Ca-montmorillonite in the partial alkalescency are relatively favorable for hydrolysis of fatty acid ester at low temperature.The hydrolysis rates of fatty acid ester catalyzed by minerals at low temperature are ranging from 90% to 50%,mostly in 22%～ 34%.