Adsorption of 4,6-dimethyldibenzothiophene over cu/zro2

• P BAEZA ^[1] ; R BASSI ^[2] ; M VILLARROEL ^[2] ; J OJEDA ^[3] ; P ARAYA ^[4] ; G AGUILA ^[4]
  1. [1] Pontificia Universidad Católica de Valparaíso Facultad de Ciencias Instituto de Química
  2. [2] Universidad de Santiago de Chile Facultad de Ciencias Instituto de Química
  3. [3] Universidad de Valparaíso Facultad de Farmacia
  4. [4] Universidad de Chile Facultad de Ciencias Físicas y Matemáticas Departamento de Ingeniería Química y Biotecnología

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• Localización: Journal of the Chilean Chemical Society (Boletín de la Sociedad Chilena de Química), ISSN-e 0717-6309, ISSN 0366-1644, Vol. 60, Nº. 1, 2015, págs. 2817-2821
• Idioma: inglés
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• Resumen

  • 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 H2-TPR, 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.