Characteristics of sulfur removal by silver-titania adsorbents at ambient conditions

Adsorption, Volume 17, Number 4, 663-673, DOI: 10.1007/s10450-011-9362-2

Characteristics of sulfur removal by silver-titania adsorbents at ambient conditions

Sachin Nair (1)

Bruce J. Tatarchuk (1)

tatarbj@auburn.edu

1 .Department of Chemical Engineering, Auburn University, Auburn, AL 36849, USA

Abstract

Describes results of investigation of sulfur capacity of SiO2, TiO2 and ?-Al2O3 structures.  Sulfur capacity was associated with surface acidity and the improvement attributed to the formation of bronsted acid sites. Addition of 4wt% transition metals further enhanced the sulfur capacity of TiO2 with Ag indicating the highest increase.

Comparison of sulfur capacity of Ag/TiO2 with other adsorbents was made using JP5 fuel with sulfur concentration of 1172 ppmw.. A significant loss in sulfur capacity was observed between real and model fuel compositions.

Various factors resulting in this loss was investigated such as the effect of additives, competitive adsorption and the structure of sulfur heterocycles.

[EXCERPT]

This was attributed to the variation in p electron density between sulfur heterocycles.  Delocalization of p electrons is influenced by the number of aromatic rings on the aromatic. p complexation have been used to explain sulfur capacity of Cu-Y type zeolites. ...

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