Integrated investigation for extractive denitrogenation of fuel oils with Eco-friendly Piperazine-Based ionic liquids

Gao, Peng; Yang, Lin; Wang, Jixiang; Gao, Jun; Xu, Dongmei; Ma, Linzheng; Zhang, Lianzheng; Wang, Yinglong

doi:10.1016/j.fuel.2022.127187

Cited by 12 publications

(1 citation statement)

References 69 publications

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“…Recent research has concentrated on developing extraction methods for separating nitrogen-containing compounds from liquid petroleum fractions [11][12][13][14][15][16][17][18]. This dual-purpose approach involves creating an affordable and safe method for obtaining heterocyclic nitrogenous compounds for medical and pharmaceutical applications while simultaneously purifying fuel and reducing environmental impact.…”

Section: Introductionmentioning

confidence: 99%

Extraction Kinetics of Pyridine, Quinoline, and Indole from the Organic Phase with Natural Deep Eutectic Solvents and Separation Study Using a Centrifugal Extractor

Lobovich,

Zinov’eva,

Milevskii

et al. 2024

Processes

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In this study, the kinetics of extracting pyridine, quinoline, and indole from model fuels using natural deep eutectic solvents (NaDES) composed of carboxylic acids, xylitol, and water were investigated under static conditions. This research marks the first examination of extraction kinetics in this context. The key kinetic parameters of the extraction process were identified. Notably, it was observed that the mass transfer coefficient for indole was in the range of 3.4 × 10−6 to 1.2 × 10−6, depending on NaDES. That is significantly lower, by an order of magnitude, than for pyridine and quinoline under identical experimental conditions. The study revealed that, under specific conditions, where thermodynamic equilibrium for indole cannot be reached, it becomes possible to achieve kinetic separation of the components. The presented experimental data obtained on a centrifugal extractor showed a decrease in the degree of indole extraction with increasing flow: Extraction efficiency decreased from 63% at a flow rate of 0.05 L/h to 18% at 0.8 L/h. Moreover, the research indicated that, during indole extraction, the mass transfer coefficient in a centrifugal extractor was 1.3 × 10−4, which is two orders of magnitude higher than under static conditions. The study underscores the potential utility of the proposed extraction systems based on environmentally friendly NaDES, comprised of carboxylic acids and xylitol, for the kinetic separation of various classes of heterocyclic compounds. Overall, the research provides valuable insights into the kinetics of extraction and the potential applications of ‘green’ NaDES in the separation of heterocyclic compounds from organic liquids.

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