Abstract

Cold flow properties of Iranian crude oil have been investigated by two different imidazolium ionic liquids including 1-dodecyl-3-methylimidazolium reduce the pour point up to bis(trifluoromethanesulfonyl) imide ([C₁₂min](NTf₂]) and 1-tetradecyl-3-methylimidazolium bis(trifluoromethanesulfonyl) imide ([C₁₄min](NTf₂]). ([C₁₄min](NTf₂]) showed high ability to 12°C optimal performance by addition of 2000 ppm. Wax crystallization behaviour of untreated and treated crude oil was monitored using differential scanning calorimetry (DSC) and the polarized optical microscopy (POM). Results from DSC and POM revealed that the presence of both ILs changes the process of crystallization and extends wax precipitation time. Furthermore, rheological behaviour of the crude oil was improved and viscosity was decreased by 73% at 23.5°C and 87% at 15°C by addition of [C₁₄mim][NTf₂].

中文翻译：

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长链烷基化离子液体作为原油的降凝剂和流变改进剂

摘要

通过两种不同的咪唑鎓离子液体（包括1-十二烷基-3-甲基咪唑鎓）将倾点降低至双（三氟甲磺酰基）酰亚胺（[C ₁₂ min]（NTf ₂ ]）和1-十四烷基，研究了伊朗原油的冷流特性-3-甲基咪唑双（三氟甲磺酰基）酰亚胺（[C ₁₄ min]（NTf ₂ ]）。（[C ₁₄ min]（NTf ₂]）通过添加2000 ppm，具有达到12°C最佳性能的高能力。使用差示扫描量热法（DSC）和偏振光学显微镜（POM）监控未处理和已处理原油的蜡结晶行为。DSC和POM的结果表明，两种IL的存在都会改变结晶过程并延长蜡沉淀时间。此外，通过添加[C ₁₄ mim] [NTf ₂ ] ，可以改善原油的流变行为，并且在23.5°C时粘度降低73％，在15°C时粘度降低87％。