Adsorption of thiophene and dibenzothiophene on highly dispersed Cu/ZrO2 adsorbents

Baeza, P.; Águila, Gonzalo; Vargas, G.; Ojeda, J.; Araya, Paulo

doi:10.1016/j.apcatb.2011.09.026

Cited by 52 publications

(44 citation statements)

References 18 publications

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“…These include desulfurization by microbial oxidation 6,7 , chemical oxidation 8,9 , ultraviolet-assisted oxidation 10 , biodesulfurization 11,12 , and adsorption [13][14][15][16][17] . In the adsorption process, sulfur compounds are removed via p-complexation [18][19][20][21][22] .…”

Section: Introductionmentioning

confidence: 99%

“…In the adsorption process, sulfur compounds are removed via p-complexation [18][19][20][21][22] . The competitive adsorption in a mixture of Dibenzothiophene (DBT) with Benzene shows greater selectivity toward the adsorption of organic sulfur compounds 13 , and particularly towards adsorption of refractory compounds due to an enhanced ability for electron donation/back-donation 18,19 . In p-complexation, cations can form the usual s bonds with their s-orbitals, while their d-orbitals can back-donate electron density to the antibonding p-orbitals of the sulfur rings.…”

Section: Introductionmentioning

confidence: 99%

“…In p-complexation, cations can form the usual s bonds with their s-orbitals, while their d-orbitals can back-donate electron density to the antibonding p-orbitals of the sulfur rings. The metals that can form this p-complexation are those that possess empty s-orbitals and available electron density at the d-orbitals 13,23 , especially Cu (I) with an electronic configuration 1s 2 2s 2 2p 6 3s 2 3p 6 3d 10 4s 0 .…”

Section: Introductionmentioning

confidence: 99%

“…In particular, we studied the adsorption of Thiophene 23 , Dibenzothiophene 13 and its derivative 24 from a mixture in n-octane at room temperature and atmospheric pressure. The results of these works showed that the adsorption capacity of copper on zirconia increases with the copper content, and higher capacities are observed in adsorbents treated with a flow of N 2 O at 90ºC.…”

Section: Introductionmentioning

confidence: 99%

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ADSORPTION OF 4,6-DIMETHYLDIBENZOTHIOPHENE OVER Cu/ZrO2

Baeza¹,

Bassi²,

Villarroel³

et al. 2015

J. Chil. Chem. Soc.

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The adsorption of refractory sulfur molecule 4,6-Dimethyldibenzothiophene (4,6-DMDBT) over copper supported on zirconia, using different copper loadings (2-10% w/w) and a zirconia support with a high specific surface area, was studied. The results showed that the adsorption capacity of 4,6-DMDBT over Cu/ZrO 2 increased with copper content, reaching a maximum at around 8% Cu (0.58 mmol 4,6-DMDBT per gram of adsorbent). The results of characterizations with H 2 -TPR, Electrophoretic Migration, and XRD demonstrated that this Cu loading (8%) also corresponds to a maximum copper dispersion capacity for ZrO 2 support. Also, these absorbents showed considerable selectivity toward the adsorption of 4,6-DMDBT in a feed stream also containing Quinoline, decreasing adsorption capacity of 4,6-DMDBT by only 35%, despite both molecules being present in the same concentrations. The results of this work showed that desulfurization adsorption using Cu/ZrO 2 adsorbents can be an effective method to remove this type of refractory sulfur molecules, and an excellent alternative as a complementary process for deep desulfurization in the fuel industry.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

ADSORPTION OF 4,6-DIMETHYLDIBENZOTHIOPHENE OVER Cu/ZrO2

Baeza¹,

Bassi²,

Villarroel³

et al. 2015

J. Chil. Chem. Soc.

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“…Cu(I), Ag(I) and Ni(II) are therefore good options. Of these, the oxidised state of Ni(II) can be obtained simply by a process of calcination [14][15][16] .…”

Section: Introductionmentioning

confidence: 99%

Development of an Analytical Method for the Main Organic Compounds Derived From Thermochemical Conversion of Biomass

Tessini

Romero²,

Escobar³

et al. 2016

J. Chil. Chem. Soc.

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The removal of 4-Nitrophenol (4-NP) from aqueous media by adsorption is studied in a batch system using different porous materials: activated carbon, zirconia, alumina, sepiolite, natural zeolite and 13X zeolite. Depending on their adsorption capacities, the best adsorbent was chosen to be impregnated with different levels of nickel (Ni) in order to study the adsorption by π-complexation in batch and continuous systems. The samples of Ni(x)/support (x= 2, 4, 6%) were prepared by wet impregnation and were characterised using the same method as with all the materials, by N 2 adsorption-desorption using the BET method, surface acidity and Z potential measurements by electrophoretic migration. The samples were measured in a UV-Vis electrophotometer at a wavelength of 318 nm, while the adsorption capacity of the material in the batch system was determined by calculating the difference in concentration once the adsorbent became saturated after an initial concentration of ~20 ppm, and in the continuous system this was done by integrating the area under the adsorption curve. The results suggest that adsorption capacity depends on the specific BET area, apparent acid strength and the IEP of each support, and that it varies with the addition of Ni.

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Desulfurization Technologies

2018

Biodesulfurization in Petroleum Refining

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Adsorption of thiophene and dibenzothiophene on highly dispersed Cu/ZrO2 adsorbents

Cited by 52 publications

References 18 publications

ADSORPTION OF 4,6-DIMETHYLDIBENZOTHIOPHENE OVER Cu/ZrO2

ADSORPTION OF 4,6-DIMETHYLDIBENZOTHIOPHENE OVER Cu/ZrO2

Development of an Analytical Method for the Main Organic Compounds Derived From Thermochemical Conversion of Biomass

Desulfurization Technologies

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