高酸原油热处理脱酸研究

采用热处理可以有效地脱除高酸原油中的石油酸,考察了热处理温度、时间对高酸原油中石油酸脱除效果的影响。试验结果表明,热处理后原油的脱酸率可以达到80%以上,温度是影响脱酸反应的主要因素。在反应温度为420～440℃时,随着温度的升高,石油酸的脱除率增加较快;当反应温度高于440℃时,原油脱酸率随温度升高增加缓慢。当反应温度低于440℃时,延长反应时间有利于提高脱酸率。在高酸原油热处理脱酸过程中,原油烃分子发生裂化、缩合反应,引起原油的物理化学性质发生变化。

Thermal Treatment for Decreasing the Acidity of Crude Oil

Highly acidic crude oil is thermally soaked to investigate how the temperature and time involved affect the removal of organic acid in feedstock. Experimental results indicate that thermal treatment is an effective approach to decreasing acidity and the acid removal rate reaches 80%. Temperature is one of the main factors that determine the acid removal reaction. When the temperature ranges from 420oC to 440oC, the acid removal rate increases with the rise of the reaction temperature, but the increase slows down gradually. At the reaction temperature below 440oC, the long reaction time favors the acid removal. The cracking and polymerization of hydrocarbon molecules take place so that the properties of the crude oil change at the same time when the highly acidic crude is thermally treated.