Hierarchical TS-1 zeolite as an efficient catalyst for oxidative desulphurization of hydrocarbon fractions
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Type
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Journal
Article
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Author
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D.
P. Serrano
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Author
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R.
Sanz
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Author
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P.
Pizarro
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Author
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I.
Moreno
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Author
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S.
Medina
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URL
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Series
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7th
International Conference on Environmental Catalysis (ICEC2012), Lyon, France
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Volume
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146
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Pages
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35-42
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Publication
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Applied
Catalysis B: Environmental
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Date
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March
2014
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Abstract
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Reports
a study of the catalytic oxidative desulphurization (ODS) of S-containing
aromatic compounds over a hierarchical TS-1 zeolite prepared from silanized
protozeolitic units, characterized by having, beyond the zeolitic micropores,
a secondary porosity within the supermicro/mesopore region.
Researchers used a standard TS-1 sample as reference catalyst. They examined the influence of both the solvent and the oxidizing agent using dibenzothiophene (DBT) as model substrate. In each case, the catalytic activity exhibited by the hierarchical TS-1 was much higher than that obtained with the conventional TS-1 as a consequence of the improved accessibility caused by the presence of the secondary porosity. A very high desulphurization activity was obtained with the combination of heptane and TBHP, as solvent and oxidant, respectively, leading to an almost total DBT conversion. Researchers attribute this fact to the full miscibility of the oxidant solution in the organic reaction medium. |
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