Adsorption of 4,6-Dimethyldibenzothiophene over Cu/ZrO2
Author
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Baeza, P.
Author
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Bassi, R.
Author
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Villarroel, M.
Author
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Ojeda, J.
Author
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Araya Figueroa, Paulo
Author
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Aguila Avilés, Gonzalo
Admission date
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2015-08-31T19:48:41Z
Available date
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2015-08-31T19:48:41Z
Publication date
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2015
Cita de ítem
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Journal of the Chilean Chemical Society, 60, Nº 1 (2015)
en_US
Identifier
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0717-9707
Identifier
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https://repositorio.uchile.cl/handle/2250/133323
General note
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Artículo de Publicación ISI
en_US
Abstract
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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/ZrO2 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 H2TPR, Electrophoretic Migration, and XRD demonstrated that this Cu loading (8%) also corresponds to a maximum copper dispersion capacity for ZrO2 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/ZrO2 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.