NDLI: Fixed bed adsorption of benzothiophene over zeolites with faujasite structure

Content Provider	Springer Nature Link
Author	Sotelo, J. L. Uguina, M. A. Águeda, V. I.
Copyright Year	2007
Abstract	This work addresses the adsorption of benzothiophene (BT), as a model heterocyclic and aromatic sulphur compound present in road fuels, over agglomerated zeolites with faujasite structure. Several adsorbents based on zeolites with FAU structure have been prepared with different Si/Al molar ratios and exchange cations and then agglomerated. The influence of the zeolite basicity has been studied, both in equilibrium and dynamic liquid phase adsorption experiments. Basicity of the adsorbent increased as the Si/Al molar ratio and the electronegativity of the exchange cation decreased. In equilibrium experiments, the affinity towards the adsorbent increased as the Si/Al molar ratio decreased, showing the highest affinity for exchanged low silica X zeolites with medium basicity (A-KLSX-02). Dynamic experiments showed that the less zeolite basicity, the higher fractional bed utilization and adsorption capacity at breakthrough time. Besides, zeolites with high basicity did not reach the equilibrium capacity due to the low diffusivity of BT into the micropores. Thermogravimetric analyses of the spent adsorbents showed a stronger BT adsorption onto the more basic zeolites. As main conclusion, adsorbents with medium basicity could present the best performance in fuel desulphurization due to their high affinity with sulphur compounds, although diffusion problems should be taken into account.
Starting Page	331
Ending Page	339
Page Count	9
File Format	PDF
ISSN	09295607
Journal	Adsorption
Volume Number	13
Issue Number	3-4
e-ISSN	15728757
Language	English
Publisher	Springer US
Publisher Date	2007-09-20
Publisher Place	Boston
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Benzothiophene LSX zeolites Basicity Agglomeration Desulphurization Adsorption Fixed bed Engineering Thermodynamics, Transport Phenomena Industrial Chemistry/Chemical Engineering Surfaces and Interfaces, Thin Films
Content Type	Text
Resource Type	Article
Subject	Chemistry Chemical Engineering Surfaces and Interfaces

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