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Vanadium oxide supported on porous clay heterostructure for the partial oxidation of hydrogen sulphide to sulfur

Paper ID Volume ID Publish Year Pages File Format Full-Text
53744 46982 2015 7 PDF Available
Title
Vanadium oxide supported on porous clay heterostructure for the partial oxidation of hydrogen sulphide to sulfur
Abstract

•Porous clay heterostructure (PCH) has been synthesized by a sol–gel method.•PCH-xV have shown be active and selective in the partial oxidation of H2S.•Vanadium content is directly related with the catalytic activity.•V4O9 species seem be the active phase in the partial oxidation of H2S.

Vanadium oxide supported on porous clay heterostructures (PCH) catalysts have been synthesized, characterized and evaluated in the selective oxidation of H2S to elemental sulfur. The catalysts were characterized by XRD, adsorption–desorption of N2 at −196 °C, diffuse reflectance UV–vis, H2-TPR, Raman spectroscopy and XPS. The catalysts with higher vanadium content are more active and selective, exhibiting a H2S conversion close to 70% after 360 h on stream with a high selectivity toward elemental sulfur and a low formation of undesired SO2. The catalysts with V2O5 crystallites have shown a higher activity and resistance to the deactivation. The analysis of the spent catalyst has revealed the formation of V4O9 crystals during the catalytic test, which has been reported as the active phase in the selective oxidation of the H2S.

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Keywords
V2O5; V4O9; Porous clay heterostructure; H2S; Selective oxidation
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Vanadium oxide supported on porous clay heterostructure for the partial oxidation of hydrogen sulphide to sulfur
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Publisher
Database: Elsevier - ScienceDirect
Journal: Catalysis Today - Volume 254, 1 October 2015, Pages 36–42
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
Get Full-Text Now
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Price was $35.95
You save - $31
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Full-text PDF Download
Online Support
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