TY - JOUR
T1 - Adsorption of thiophene and dibenzothiophene on highly dispersed Cu/ZrO 2 adsorbents
AU - Baeza, P.
AU - Aguila, G.
AU - Vargas, G.
AU - Ojeda, J.
AU - Araya, P.
N1 - Copyright:
Copyright 2012 Elsevier B.V., All rights reserved.
PY - 2012/1/12
Y1 - 2012/1/12
N2 - The effect of surface area of copper/zirconia adsorbents on the adsorption of thiophene (T) and dibenzothiophene (DBT) was studied. Adsorbents were prepared with different loads of copper (1-6%), using as support zirconias with different surface areas, obtained by varying the calcination temperature. Lower calcination temperatures allowed obtaining zirconias with higher surface area, but lower crystallinity. The characterization results showed that high surface area zirconias have greater copper dispersion capacity, being the zirconia calcined at the lower temperature, the only able to completely disperse a load of 6% Cu, i.e., Z-300 surface has only highly dispersed copper species, while zirconias with higher calcination temperature have also bulk CuO species. The adsorption capacity of T or DBT on Cu/ZrO 2 increased with copper content, reaching a maximum, which coincides remarkably with the zirconia dispersion capacity. This result indicates that dispersed copper species, in Cu 1+ state, are responsible for the adsorption of these sulfur organic compounds. Therefore the best adsorption capacities were obtained in adsorbents with high content of such copper species, and these adsorbent can be prepared with high surface area ZrO 2, that is with high dispersion capacity of copper.
AB - The effect of surface area of copper/zirconia adsorbents on the adsorption of thiophene (T) and dibenzothiophene (DBT) was studied. Adsorbents were prepared with different loads of copper (1-6%), using as support zirconias with different surface areas, obtained by varying the calcination temperature. Lower calcination temperatures allowed obtaining zirconias with higher surface area, but lower crystallinity. The characterization results showed that high surface area zirconias have greater copper dispersion capacity, being the zirconia calcined at the lower temperature, the only able to completely disperse a load of 6% Cu, i.e., Z-300 surface has only highly dispersed copper species, while zirconias with higher calcination temperature have also bulk CuO species. The adsorption capacity of T or DBT on Cu/ZrO 2 increased with copper content, reaching a maximum, which coincides remarkably with the zirconia dispersion capacity. This result indicates that dispersed copper species, in Cu 1+ state, are responsible for the adsorption of these sulfur organic compounds. Therefore the best adsorption capacities were obtained in adsorbents with high content of such copper species, and these adsorbent can be prepared with high surface area ZrO 2, that is with high dispersion capacity of copper.
KW - Adsorption
KW - Copper
KW - Dibenzothiophene
KW - Thiophene
KW - Zirconia
UR - http://www.scopus.com/inward/record.url?scp=84155171135&partnerID=8YFLogxK
U2 - 10.1016/j.apcatb.2011.09.026
DO - 10.1016/j.apcatb.2011.09.026
M3 - Article
AN - SCOPUS:84155171135
SN - 0926-3373
VL - 111-112
SP - 133
EP - 140
JO - Applied Catalysis B: Environmental
JF - Applied Catalysis B: Environmental
ER -