Extractive desulfurization of diesel fuel in a novel ultrasound-assisted spiral microfluidic contactor: Separation efficiency and energy consumption

Karamzadeh, Masoud; Movahedirad, Salman; Sobati, Mohammad Amin

doi:10.1016/j.fuel.2022.125582

Cited by 18 publications

(16 citation statements)

References 42 publications

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“…All aspects related to the role of the volumetric ratio in EDS performed in microdevices corroborate with the works present in the literature. ,− Figure shows the contour plot generated from the experimental data in Table S2. The surface shows that the highest levels of DBT removal occur when working at a volumetric ratio between 1.0 and 1.5.…”

Section: Resultssupporting

confidence: 83%

“…The statistical results presented in Table 2 show that the volumetric ratio was the most important variable of the experimental design employed. As shown by Ji et al, 4 Karamzadeh et al, 11 and Al-Azzawi et al, 20 the increase in the volumetric ratio (proportion between solvent and fuel) results in an increase in the interfacial area, providing more opportunities for the interaction between sulfur contaminants and solvents, leading to higher process efficiencies. This type of behavior was widely discussed by Jin et al 30 in which the authors used a mathematical formulation based on global mass transfer equations, exposing physical behaviors in microsystems.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

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Diesel Desulfurization Experiments in Microchannels with PEG 300: An Understanding of Extractive Deep Desulfurization

Santiago,

Silva,

Sobrinho

et al. 2023

Ind. Eng. Chem. Res.

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Conventional methods for removing sulfur compounds perform poorly when streams are treated with refractory compounds such as dibenzothiophene (DBT) and its derivatives. Current studies have directed efforts to investigate extractive desulfurization (EDS) using microdevices. Microdevices are units with micrometer-sized channels that enhance the mass and heat transfer phenomena. For EDS in microdevices to be viable, it is essential to choose the appropriate extractor solvent. Among the possibilities, an excellent candidate is polyethylene glycol (PEG). The present work aims to analyze the use of PEG 300 for EDS in microfluidics using hexadecane as a model fuel to emulate diesel. The experiments followed the logic of a fractional experimental design that allowed extractive solvent insights into deep desulfurization. In addition, the mass transfer phenomena involved and the application of the best experimental conditions in a real diesel sample were evaluated. The results obtained with model fuel were able to achieve 99.36% DBT removal with a 1.0 min residence time, a 1:1 volumetric ratio, and three extraction cycles. Furthermore, by applying the best experimental conditions to diesel, the total sulfur concentration decreased from 1646 to 312 ppm, resulting in an extractive efficiency of 81.04%.

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Section: Resultssupporting

confidence: 83%

Section: ■ Results and Discussionmentioning

confidence: 99%

Diesel Desulfurization Experiments in Microchannels with PEG 300: An Understanding of Extractive Deep Desulfurization

Santiago,

Silva,

Sobrinho

et al. 2023

Ind. Eng. Chem. Res.

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“…The SCCs present in the fuel can be identified using gas chromatography with pulsed flame photometric detection (GC‐PFPD) based on the peaks corresponding to the SCCs. [ 51 ]…”

Section: Resultsmentioning

confidence: 99%

Ozonation/extraction coupled non‐catalytic desulphurization of VGO/natural gas condensate

et al. 2023

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The desulphurization of hydrocarbon fuels with high sulphur content and a wide variety of sulphur‐containing compounds brings significant challenges. In the present work, the non‐catalytic desulphurization of vacuum gas oil (VGO) and natural gas condensate mixed fuel has been investigated. In this regard, ozone was employed as the oxidant in a bubble column gas–liquid contactor, and an extraction step was further incorporated. The effects of the oxidation reactor scheme, ozonation time, and extraction with different solvents, applying pre‐ and post‐extraction strategies (i.e., ozonation/extraction/extraction and extraction/ozonation/extraction), have been studied. It was found that pre‐extraction of mixed fuel increases the oxidative desulphurization (ODS) efficiency due to the removal of light sulphur‐containing compounds (SCCs). N‐methyl‐2‐pyrrolidone (NMP) has been found to be the most effective extraction agent, removing 44% of sulphur by pure extraction and 77.4% by ozonation + extraction. However, in terms of fuel loss, dimethylformamide (DMF) performs better than NMP, and it has been shown to be the most appropriate solvent for achieving a 90% desulphurization ratio. Finally, it was found that the applied procedure could effectively remove the wide range of SCCs, especially refractive components such as benzothiophene (BT) and dibenzothiophene (DBT).

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“…Moreover, mass production can be achieved by paralleling integration and automation of these micro‐unit operations. [ 6–9 ]…”

Section: Introductionmentioning

confidence: 99%

“…Moreover, mass production can be achieved by paralleling integration and automation of these micro-unit operations. [6][7][8][9] Typically, the active ingredients of drugs can be entrapped inside the matrix of biodegradable polymeric NPs with sizes less than 1 μm. [10] Preformed polymers can be used to produce polymeric NPs by different methods such as nanoprecipitation, [11] dialysis, [12] emulsification-solvent evaporation, [13] and supercritical fluid technology.…”

Section: Introductionmentioning

confidence: 99%

Computational fluid dynamic study of polycaprolactone nanoparticles precipitation in a co‐flow capillary micro‐tube

2022

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Polycaprolactone nanoparticles (NPs) were produced in the co‐flow glass capillary device with 250μm tip dimension. NPs size was 990 nm for continuous phase velocity, and uc=0.05m/s and 426 nm for uc=0.2m/s. The droplet formation process in the co‐flow microchannel was also simulated using computational fluid dynamic (CFD). Employing a digital image analysis technique, a cut‐off value of 0.81 for the dispersed phase volume fraction was proposed for the determination of droplet size. A scenario was expressed for NP formation from micro‐droplets. Moreover, after conducting 27 CFD simulations, a dimensionless exponential form correlation was proposed for droplet size estimation. In this generalized map, there were three distinct regions based on the relative capillary numbers of continuous to dispersed phases. It was revealed that at a constant dispersed phase velocity, by increasing the continuous phase velocity, more small NPs are formed. The results show that the ratio of micro‐droplets to NPs size was between 735 and 755.

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Extractive desulfurization of diesel fuel in a novel ultrasound-assisted spiral microfluidic contactor: Separation efficiency and energy consumption

Cited by 18 publications

References 42 publications

Diesel Desulfurization Experiments in Microchannels with PEG 300: An Understanding of Extractive Deep Desulfurization

Diesel Desulfurization Experiments in Microchannels with PEG 300: An Understanding of Extractive Deep Desulfurization

Ozonation/extraction coupled non‐catalytic desulphurization of VGO/natural gas condensate

Computational fluid dynamic study of polycaprolactone nanoparticles precipitation in a co‐flow capillary micro‐tube

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