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Article Dans Une Revue Journal of Chemical and Engineering Data Année : 2010

Selective adsorption of neutral nitrogen compounds from fuel using ion-exchange resins.

Résumé

Adsorptive removal of hydrodesulfurization inhibitors, that is, nitrogen-containing compounds (N-compounds), was studied using model fuel which contains carbazole and dibenzothiophene in an n-dodecane−toluene mixture over ion-exchange resins (IXRs) in batch and in fixed-bed adsorption systems. The adsorptive capacity and selectivity for neutral N-compounds were examined. The high affinity for neutral N-compounds present in hydrocarbon feed was explained by hydrogen bonding between the chloride anion (with nonbonding electrons) and the neutral N-compounds. However, the presence of a flat charged cation, that is, N-alkylated pyridinium, is essential to ensure the adsorption of neutral N-compounds. The regeneration of the sorbent could be easily performed using polar organic solvent like methanol. Commercially available IXR bearing pyridinium chloride functionality (HPQ) was further evaluated with straight-run fuel oil. The N/S selectivity decreases, but analysis of the adsorbed compounds by gas chromatography/mass spectroscopy (GC/MS) shows that no paraffin and no monoaromatics were adsorbed. The results obtained provided new insight into the fundamental understanding of the adsorption mechanism of neutral N-compounds from hydrocarbon feed.

Domaines

Chimie organique
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Dates et versions

hal-01166833 , version 1 (23-06-2015)

Identifiants

  • HAL Id : hal-01166833 , version 1

Citer

Li-Li Xie, Alain Favre-Reguillon, Xu-Xu Wang, Xianzhi Fu, Marc Lemaire. Selective adsorption of neutral nitrogen compounds from fuel using ion-exchange resins.. Journal of Chemical and Engineering Data, 2010, 55 (11), pp.4849-4853. ⟨hal-01166833⟩
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