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Preliminary study on the selective oxidation of H2S over LaVO4 and Fe2(MoO4)3 oxides, produced by a solvothermal method

Paper ID Volume ID Publish Year Pages File Format Full-Text
51528 46846 2009 4 PDF Available
Title
Preliminary study on the selective oxidation of H2S over LaVO4 and Fe2(MoO4)3 oxides, produced by a solvothermal method
Abstract

LaVO4 and β-FeMoO4 powders were synthesized by a solvothermal route followed by a high temperature supercritical drying step. The X-ray diffraction (XRD) patterns exhibit partly amorphous LaVO4 and crystalline Fe2(MoO4)3 phases. Subsequently heat treated samples were analyzed by the Fourier-transform infrared spectroscopy (FTIR) in order to determine the surface active species, which might be responsible for the selective oxidation of H2S. Catalytic activity tests were carried out in a fixed-bed reactor. The sulfur yield and selectivity for the LaVO4 was significantly higher than that of Fe2(MoO4)3 in the temperature range, i.e. 220–300 °C. It is proposed that the oxidation activity of these two catalysts investigated is based on a mechanism, which is similar to that in the case of alkane oxidation. Besides the effect of the formed surface species, the differences in the structure of the catalyst and its intrinsic reactivity should also be considered.

Keywords
Selective oxidation; Hydrogen sulfide; Lanthanum vanadate; Iron molybdate; Infrared spectroscopy
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Preliminary study on the selective oxidation of H2S over LaVO4 and Fe2(MoO4)3 oxides, produced by a solvothermal method
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Publisher
Database: Elsevier - ScienceDirect
Journal: Catalysis Communications - Volume 10, Issue 7, 10 March 2009, Pages 1039–1042
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
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
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