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

Paper ID Volume ID Publish Year Pages File Format Full-Text
46457 46440 2012 8 PDF Available
Title
Adsorption of thiophene and dibenzothiophene on highly dispersed Cu/ZrO2 adsorbents
Abstract

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/ZrO2 increased with copper content, reaching a maximum, which coincides remarkably with the zirconia dispersion capacity. This result indicates that dispersed copper species, in Cu1+ 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 ZrO2, that is with high dispersion capacity of copper.

Graphical abstractFigure optionsDownload full-size imageDownload as PowerPoint slideHighlights► ZrO2 supported Cu adsorbents of thiophene and dibenzothiophene were used for a “deep desulfurization”. ► Different calcination temperatures were used in order to obtain ZrO2 supports with different specific surface areas. ► Cu/ZrO2 adsorbents have higher adsorption capacity when the support has a greater specific surface area. ► ZrO2 with high specific surface area allows a greater dispersion of copper, and therefore a higher adsorption capacity.

Keywords
Adsorption; Copper; Zirconia; Thiophene; Dibenzothiophene
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Adsorption of thiophene and dibenzothiophene on highly dispersed Cu/ZrO2 adsorbents
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis B: Environmental - Volumes 111–112, 12 January 2012, Pages 133–140
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us