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Title: Zn supported on Zr modified mesoporous SBA-15 as sorbents of pollutant precursors contained in fossil fuels: Si/Zr ratio effect
Authors: Colín Luna, José Antonio
Zamora Rodea, G.E.
Medina Mendoza, Ana Karina
Alvarado Perea, Leo
Angeles Chávez, Carlos
Escobar, José
Pacheco Sosa, José Guadalupe
García Martínez, Julio César
Issue Date: 2019
Publisher: Elsevier
Abstract: The adsption processes have become an additional alternative to hydrotreatment processes of oilderived middle distillates. The crucial point is the type of adsorbent employed. SBA-15 mesoporous materials were used to adsorb quinoline (Q) and dibenzothiophene (DBT) as N- and S-containing model species, espectively, contained in a model mixture mimicking middle distillates. Q and DBT in dodecane solutions (50-250 ppm and 500 ppm, respectively) were used to that end. In order to improve the adsorption properties, SBA-15 was modified, incorporating zirconium at Si/Zr weight ratios of 5, 16, 60, and 150. At those ratios, Q was adsorbed preferably, whereas DBT was removed only below 10%. To increase the amount of S dsorbed, Zn was incorporated at 2 wt. %. At 250 ppm (sol. concentration) of N, the amount adsorbed of Q and DBT on the material without Zn (Si/Zr=5) was 1.51 and 0.02 mmolgads -1, respectively. The results were notably different when Zn was incorporated in adsorbents. In these case, amounts of adsorbed Q and DBT were 2.2 and 1.3 mmolgads -1, respectively, showing that metal sites are essential to adsorb DBT.
ISSN: 0920-5861
Other Identifiers: info:eu-repo/semantics/publishedVersion
Appears in Collections:*Documentos Académicos*-- M. en Ciencias de la Ing.

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