Ultra-deep desulfurization and denitrogenation of diesel fuel by selective adsorption over three different adsorbents: A study on adsorptive selectivity and mechanism

Role of phosphorus in carbon matrix in desulfurization of diesel fuel using adsorption process

“…The highest selectivities calculated in reference to naphthalene [7] found in our previous research efforts were 5.2 and 5.6 for DBT and DMDBT [28] and 6.6 and 5.4 for DBT and DMDBT [27] on sulfur enriched polymer based carbon modified with H 2 S and nanoporous carbon with sulfur and oxygen functionalities, respectively. The selectivities reported in the literature are 3.0 and 4.5 for DBT and DMDBT for the micro/mesoporous carbon [7] and 3.9 and 4.9 for DBT and DMDBT on microporous activated carbon [51].…”

“…The selectivities reported in the literature are 3.0 and 4.5 for DBT and DMDBT for the micro/mesoporous carbon [7] and 3.9 and 4.9 for DBT and DMDBT on microporous activated carbon [51].…”

“…The highest capacities reported by other research groups are 0.36 mmol-S/g of adsorbent on oxidized micro and micro/mesoporous activated carbons (from diesel fuel containing 400 ppmw of sulfur [51]. The total sulfur adsorption capacity on activated carbon without any modification (Nuchar SA) was reported to be 0.49 mmol-S/g of adsorbent with 687 ppmw sulfur in fuel [7]. Eve though Wang and coworkers reported about 0.9 mmol-S/g on their phosphoric activated carbons those capacities were measured at equilibrium conditions from the fuel containing 300 ppm of DBT [49].…”

“…The breakthrough curves for all components of MDF are presented in Figure 1 [7] and less basic [43]. Treatment with phosphoric acid increases the capacity up to about 30 % and the effect is especially seen at the breakthrough point.…”

“…Scientific efforts focus on oxidation [1,2], photoxidation [3,4] or adsorption . The adsorption based methods applied activated alumina [7,8], zeolites [9], and activated carbons [7,[10][11][12][13][14][15][16][17][18][19][20][21][22][23][24][25][26][27][28][29] as adsorbents. The results obtained on the latter materials seem promising [12,22,[26][27][28].…”