Simulation of a fixed bed adsorber for thiophene removal

A NiY zeolite based vapor phase adsorptive desulfurization process has been described which can bring down sulphur concentration of a commercial BS IV grade (Euro IV equivalent) diesel from 50 ppm to < 5 ppm level. Compared to literature reports on fixed bed adsorptive desulfurization of diesel using zeolite adsorbents, the present process has advantage of easy regenerability of the adsorbent with minimum temperature swing between adsorption and regeneration step. Multi cycle stability of the desulfurization performance was also demonstrated.

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“…The detailed formulation procedure is reported elsewhere [24]. Before exchange the base zeolite was calcined at 500 o C for 6 hrs.…”

Section: Adsorbent Preparation and Characterizationmentioning

confidence: 99%

“…In continuation of our earlier work [24,25,26] on adsorptive desulphurization process development, in the present work we have studied feasibility of ultra deep desulfurization of a low sulphur (50 ppm) commercial diesel using a zeolite based vapor phase adsorption process.…”

Section: Introductionmentioning

confidence: 95%

A vapor phase adsorptive desulfurization process for producing ultra low sulphur diesel using NiY zeolite as a regenerable adsorbent

et al. 2015

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“…The recent US EPA Tier II regulation mandated a sulfur level of 30 and 15 ppmw in gasoline and diesel, respectively. Likewise, European Union gasoline and diesel fuel specifications call for 10 ppmw sulfur in Euro-IV [6].…”

Section: Introductionmentioning

confidence: 99%

“…This process can economically reduce sulfur from few thousands to few hundreds ppm level [6]. HDS process is currently employed at elevated temperatures (300-340 o C) and hydrogen partial pressures of 20-100 atm, to convert organosulfur compounds to hydrogen sulfide (H 2 S) [9].…”

Section: Introductionmentioning

confidence: 99%

“…The process is also not economical for deep desulfurization (to few tens of ppm level), as a severe process condition (i.e. high hydrogen pressure and temperature) is required for catalytic decomposition of refractory organosulfur compounds [6]. Thus, even after performing the conventional HDS process on a fuel, the refractory sulfur compounds such as thiophene (T), benzothiophene, dibenzothiophene, and their alkylated derivatives remain unconverted [1,10,11].…”

Section: Introductionmentioning

confidence: 99%

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The performance of pelletized Ce-Y and Ni-Y zeolites for removal of thiophene from model gasoline solutions

Montazerolghaem

Seyedeyn-Azad

Rahimi

2014

Korean J. Chem. Eng.

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H-Y zeolite was prepared with Na-Y zeolite via ion-exchange method. Ni-Y and Ce-Y zeolites were then prepared with H-Y zeolite via solid-state ion-exchange (SSIE) method. The pellet form of the zeolites was employed for removal of thiophene from samples containing 194, 116 and 72 ppmw sulfur in a batch system at ambient condition. The removal of sulfur over the three types of the adsorbents decreased according to the following order: Ce-Y (81.7%) >Ni-Y (75.2%)>Na-Y (51.7%), indicating that the Ce-Y zeolite was the most effective adsorbent for removing of sulfur compounds from gasoline. Adsorption isotherms of thiophene on Ni-Y and Ce-Y zeolites were obtained and correlated with six well-known isotherms. The equilibrium data of thiophene adsorption were well fitted to the isotherms and the corresponding parameters and fitting error criteria of the isotherm equations were obtained.

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Equilibrium and kinetic modeling of adsorptive sulfur removal from gasoline by synthesized Ce–Y zeolite

Montazerolghaem

Rahimi

Seyedeyn-Azad

2010

Applied Surface Science

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Simulation of a fixed bed adsorber for thiophene removal

Cited by 18 publications

References 13 publications

A vapor phase adsorptive desulfurization process for producing ultra low sulphur diesel using NiY zeolite as a regenerable adsorbent

A vapor phase adsorptive desulfurization process for producing ultra low sulphur diesel using NiY zeolite as a regenerable adsorbent

The performance of pelletized Ce-Y and Ni-Y zeolites for removal of thiophene from model gasoline solutions

Equilibrium and kinetic modeling of adsorptive sulfur removal from gasoline by synthesized Ce–Y zeolite

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