Desulfurization of Transportation Fuels with Zeolites under Ambient Conditions.

Yang, Ralph T.; Hernández‐Maldonado, Arturo J.; Yang, Frances H.

doi:10.1002/chin.200340236

Cited by 104 publications

(179 citation statements)

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“…3). Cation-bonding between electron-rich aromatic structures and metal ions and ammonium ions toward molecular recognition and selective metal binding had been well documented in the literatures [15,31]. For example, Qu et al found that the presence of tetra-alkyl ammonium largely enhanced the sorption NAPH, PHEN and PYR on smectite mainly due to formation of strong cation-EDA complexes between ammonium cation and PAHs [15].…”

Section: Effect Of Different Species Ofmentioning

confidence: 98%

Sorption of aromatic hydrocarbons onto montmorillonite as affected by norfloxacin

Pei

Kong

Shan

et al. 2012

Journal of Hazardous Materials

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a b s t r a c tEffect of norfloxacin (Nor) on the sorption of 1,3-dinitrobenzene (1,3-DNB), and PAHs (naphthalene (NAPH), phenanthrene (PHEN) and pyrene (PYR)) to K + -montmorillonite was studied. Nor suppressed 1,3-DNB sorption due to their competition for the same sorption sites. 1,3-DNB was sorbed on K + -montmorillonite surface via cation-polar interaction and n-electron donor-acceptor interaction. Nor also was sorbed on these sites through cation exchange, cation bridging and/or surface complexation. Nor increased three PAHs sorption on montmorillonite and the enhanced magnitude was positively correlated with the -donor strength of three PAHs. The enhanced sorption of PAHs by Nor was primarily attributed to -interaction between -electron-depleted quinoline ring of Nor and -electron-rich PAHs. Compared with cation (Nor + ) and anion (Nor − ), zwitterion (Nor ± ) of Nor increased PHEN and PYR sorption more pronounced due to additional cation-interaction between the sorbed Nor ± and PAHs. 1 H NMR spectrum provided direct evidence for -and cation-complexation between PAHs and Nor + in solution by ring-current-induced upfield chemical shifts of amino group and methylene group of Nor + .

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Section: Effect Of Different Species Ofmentioning

confidence: 98%

Sorption of aromatic hydrocarbons onto montmorillonite as affected by norfloxacin

Pei

Kong

Shan

et al. 2012

Journal of Hazardous Materials

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“…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].…”

Section: Introductionmentioning

confidence: 99%

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

Seredych

Wu²,

Brender

et al. 2012

Fuel

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Adsorptive removal of dibenzothiophene (DBT) and 4, from model diesel fuel with 20 ppmw total concentration of sulfur was investigated on polymerderived carbons with incorporated heteroatoms of oxygen, sulfur and phosphorus. The materials before and after exposure to model diesel fuel were characterized using adsorption of nitrogen, thermal analysis, potentiometric titration, XPS and elemental analysis. The selectivities for DBT and DMDBT adsorption were calculated with reference to naphthalene. The results indicated that the presence of phosphorus, especially in the form of pyrophosphates and P 2 O 5 , increases the capacity and selectivity for removal of dibenzothiophenes. It also affects the adsorption mechanism. Phosphorus suppresses oxidation reactions of DBT and DMDBT. Owing to a possible location of bulky phosphorus groups in pore with sizes between 10-30 Å thiophenic molecules are strongly adsorbed there via dispersive forces. Acidic environment also enhances adsorption via acid-base interactions. Physical adsorption mechanism and stability of surface make these carbons attractive candidates for thermal regeneration.

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“…Accordingly, both C300 and A100 MOFs were considered for further studies. From the quantities of S retained at equilibrium it results that the extent of DBT adsorption on MOF systems investigated in the present work is in the order of 6-8 times higher than that previously reported using conventional Y zeolite or activated carbons sorbents (Yang et al, 2003;Zhou et al, 2006). Due to the excellent performance of the MOF systems several parameters influencing their adsorption capacity were examined.…”

Section: Adsorption Of Dbt On Mofsmentioning

confidence: 66%

“…Y-zeolite has been selected because it is a microporous, crystalline material with a high adsorption capability often employed in the removal of sulfur compounds from liquid fuels (Hernandez-Maldonado and Yang, 2004;Yang et al, 2003). One important characteristic of these isotherms is that the extent of adsorption of the three organo-sulfur compounds at any concentration in liquid-phase is much lower than that reached on the C300 MOF system.…”

Section: Adsorption Of Different Organo-sulfur Compoundsmentioning

confidence: 99%

“…This alternative offers also some advantages, such as mild operation conditions (temperatures close to ambient, atmospheric pressure) and no need of hydrogen or oxygen. Many studies have been undertaken to develop adsorbents for the desulfurization of transportation fuels using zeolites (Yang et al 2003;Hernandez-Maldonado and Yang, 2004), mesoporous materials (Ko et al, 2007) and activated carbons (Zhou et al, 2006;Deliyanni et al, 2009;Jeon et al, 2009). In the case of activated carbons it was concluded that the micropore volume, the diameter of which is similar to the critical dimension of sulfur compounds, plays a crucial role in sulfur compound adsorption (Cychosz et al, 2008).…”

Section: Introductionmentioning

confidence: 99%

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Removal of refractory organic sulfur compounds in fossil fuels using MOF sorbents

2013

Issue 3

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The stringent new regulations to lower sulfur content in fossil fuels require new economic and efficient methods for desulfurization of recalcitrant organic sulfur. Hydrodesulfurization of such compounds is very costly and requires high operating temperature and pressure. Adsorption is a non-invasive approach that can specifically remove sulfur from refractory hydrocarbons under mild conditions and it can be potentially used in industrial desulfurization. Intensive research has been conducted in materials development to increase their desulfurization activity; however, even the highest activity obtained is still insufficient to fulfil the industrial requirements. To improve the adsorption capacity and sorbent regeneration, more work is needed in areas such as increasing specific desulfurization activity, hydrocarbon phase tolerance, sulfur removal at higher temperature, and development of new porous substrates for desulfurization of a broader range of sulfur compounds. This work comprehensively describes the adsorption of organo-sulfur compounds present in liquid fuels on metal-organic framework (MOF) compounds. It has been demonstrated that the extent of dibenzothiophene (DBT) adsorption at temperatures close to ambient (304 K) is much higher on MOF systems than on the benchmarked Y-type zeolite and activated carbons. In addition, the DBT adsorption capacity depends strongly on the MOF type as illustrated by the much higher extent of adsorption observed on the Cu-(C300) and Al-containing (A100) MOF systems than on the Fe-containing (F300) MOF counterpart.

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Desulfurization of Transportation Fuels with Zeolites under Ambient Conditions.

Cited by 104 publications

References 1 publication

Sorption of aromatic hydrocarbons onto montmorillonite as affected by norfloxacin

Sorption of aromatic hydrocarbons onto montmorillonite as affected by norfloxacin

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

Removal of refractory organic sulfur compounds in fossil fuels using MOF sorbents

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