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首页> 外文期刊>Journal of Petroleum Science & Engineering >Organic bases, carbon dioxide and naphthenic acids interactions. Effect on the stability of petroleum crude oil in water emulsions
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Organic bases, carbon dioxide and naphthenic acids interactions. Effect on the stability of petroleum crude oil in water emulsions

机译：有机碱，二氧化碳和环烷酸相互作用。 对水乳液中石油原油稳定性的影响

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摘要

Understanding the mechanisms that lead to the formation of petroleum crude oil in water emulsion is fundamental for the development of sustainable exploitation procedures and efficient oil spills remediation technologies. In this study we surveyed the effectiveness of different nitrogen-containing organic bases in promoting emulsification through the interaction with the naphthenic acid fraction present in crude oil. It was found that bulky secondary amines were the most effective, able to stabilize the emulsion at 10 wt% of oil content for more than 20 min, and the emulsion at 40 wt% for more than 5 h. Interfacial tension measurements indicated that the interaction was effective even when naphtenic acids were dosed at very low levels (total acid number lass than 0.3). It was also observed that a successive addition of carbon dioxide to the system readily induced the breaking of the emulsion, probably by affecting the equilibrium involved in the formation of the naphthenates stabilizing species. In the light of these findings, we tested polyethylene glycols bearing a terminal amino moiety as a new class of CO2 responsive emulsifiers suitable for the petroleum industry.
机译：了解导致水乳液中石油原油形成的机制是可持续开发程序和有效的石油泄漏修复技术的基础。在这项研究中，我们通过与原油中存在的环烷酸部分的相互作用来调查不同含氮有机碱对促进乳化的有效性。发现庞大的仲胺是最有效的，能够在10wt％的油含量下稳定乳液超过20分钟，并且乳液为40wt％超过5小时。界面张力测量表明，即使在极低水平下给药（总酸数LASS比0.3）时，相互作用也是有效的。还观察到，在系统中连续加入二氧化碳容易诱导乳液的破裂，可能是通过影响溶解物种溶胀物种的形成的平衡。鉴于这些发现，我们测试了载体氨基部分的聚乙二醇作为适合于石油工业的新类CO 2响应乳化剂。

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