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Koltai, Tamás; Macaud, Mathieu; Milenkovic, Alexandra; Schultz, E.; Lemaire, Marc; Vrinat, M.

doi:10.1023/a:1021017526727

Cited by 8 publications

(4 citation statements)

References 17 publications

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“…Control of the Kinetic Regime. Previous experiments were carried out to ensure the absence of intraparticle and interphase mass transfer limitations . It appeared that there were no diffusional problems under our conditions when the mass catalyst was limited to 1 g and the stirring rate was fixed to at least 900 rpm.…”

Section: Methodsmentioning

confidence: 99%

Novel Methodology toward Deep Desulfurization of Diesel Feed Based on the Selective Elimination of Nitrogen Compounds

Macaud

Sévignon

Favre‐Réguillon

et al. 2004

Ind. Eng. Chem. Res.

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π-Acceptor molecules covalently attached on hydrophilic support were used to selectively remove neutral nitrogen heterocyclic compounds from diesel feed by a charge transfer mechanism. Functionalized hydrophilic polymers can effectively adsorb nitrogen heterocyclic compounds with a high selectivity toward sulfur heterocyclic compounds from model and real feed. The results showed that charge transfer processes coupled with an ion-exchange process to selectively remove basic nitrogen compounds are efficient enough to produce denitrogenated feed in high yield. This study was conducted to determine whether trends in hydrodesulfurization (HDS) activity with lower sulfur content were mainly the result of lower reactivity of hindered sulfur compounds or due to nitrogen species inhibition. The inhibition effects of nitrogen compounds on HDS at conditions commonly used in the hydrotreatment of gas oil feedstocks has been experimentally determined. This study suggests that the selective removal of nitrogen compounds from gas oil strongly enhanced the deep desulfurization.

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Section: Methodsmentioning

confidence: 99%

Novel Methodology toward Deep Desulfurization of Diesel Feed Based on the Selective Elimination of Nitrogen Compounds

Macaud

Sévignon

Favre‐Réguillon

et al. 2004

Ind. Eng. Chem. Res.

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“…Recently, we have developed a new method for deep desulfurization of gasoils based on the formation of charge transfer complexes (CTCs). [8][9][10] Alkyldibenzothiophenes are electron rich compounds capable of forming CTCs with electron poor molecules. With an appropriate acceptor, the formed complexes are insoluble and can subsequently be removed from the gasoil by filtration.…”

Section: Introductionmentioning

confidence: 99%

Charge transfer complexes between tetranitrofluorenone and polyaromatic compounds from gasoil: a combined DFT and experimental study

Milenkovic

Loffreda

Schulz

et al. 2004

Phys. Chem. Chem. Phys.

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A new method has been recently developed for the hydrodesulfurization of gasoils based on the formation of charge transfer complexes. This method is highly selective towards the removal of alkyldibenzothiophenes from other aromatic compounds present in gasoils. Total energy calculations based on density-functional theory have been performed to study the complexation phenomenon and clarify its high selectivity. DFT calculations improve the understanding of the process and they are also useful for the design of more efficient acceptor derivatives for the desulfurization process. Five charge transfer complexes between a given acceptor and five representative donor compounds present in gasoils have been studied. Three main criteria have been used to characterize the optimized complexes: their complexation energy, their geometry and their electronic structure. The decomposition of total energy showed that the main contribution to the complexation energy comes from the Pauli repulsion and the electrostatic interactions. Hence the charge transfer complexes are not only ruled by charge transfer but also by electrostatic contributions. However, the selectivity of the complexation phenomenon is controlled by the orbital interactions.

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“…TENF forms an insoluble charge transfer complexes when reacting with sulfur compounds. 38 However, the desulfurization ratio is very low (12%) and the complexation efficiency is not high. Shiraishi et al reported the use of Chloramine T (sodium N-chloro-p-toluenesulfonamide) for reacting aromatic sulfur species in diesel.…”

Section: Miscellaneousmentioning

confidence: 99%

Deep desulfurization of diesel fuel using ionic liquids: current status and future challenges

2010

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Untitled

Cited by 8 publications

References 17 publications

Novel Methodology toward Deep Desulfurization of Diesel Feed Based on the Selective Elimination of Nitrogen Compounds

Novel Methodology toward Deep Desulfurization of Diesel Feed Based on the Selective Elimination of Nitrogen Compounds

Charge transfer complexes between tetranitrofluorenone and polyaromatic compounds from gasoil: a combined DFT and experimental study

Deep desulfurization of diesel fuel using ionic liquids: current status and future challenges

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