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Sulfidability and thiophene hydrodesulfurization activity of supported NiMo carbides

Paper ID Volume ID Publish Year Pages File Format Full-Text
50719 46811 2014 6 PDF Available
Title
Sulfidability and thiophene hydrodesulfurization activity of supported NiMo carbides
Abstract

•Catalysts obtained at pH 3 presented the best catalytic activity.•The sulfiding process improved the catalytic activity.•Catalysts presented a mix of β-Mo2C and NiC when the atomic ratio changed between (0.25–0.75).•The sulfiding process improved the catalytic activity of the catalysts.

Ni–Mo carbides supported on activated carbon were synthesized by carbothermal hydrogen reduction and the effect of the sulfidability on the thiophene hydrodesulfurization catalytic activity was studied. The X-ray diffraction patterns of Ni–Mo carbides showed the presence of β-Mo2C and NiC when the atomic ratio AR = Ni/(Ni + Mo) was between 0.25 and 0.75, while for AR = 1, it only was detected metallic Ni. The X-ray photoelectron spectroscopy results showed the distribution of different surface species in the passivated catalysts: Moδ + (0 ≤ δ ≤ 2), Mo4 +, Mo6 +, Niδ + and Ni2 +. After sulfiding the carbides were modified in their surface and catalytic activity.

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Keywords
Carbothermal hydrogen reduction; Ni–Mo carbides; Activated carbon; Thiophene hydrodesulfurization; Sulfiding
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Sulfidability and thiophene hydrodesulfurization activity of supported NiMo carbides
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Publisher
Database: Elsevier - ScienceDirect
Journal: Catalysis Communications - Volume 53, 5 August 2014, Pages 9–14
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
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Price after discount Only $4.95
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Full-text PDF Download
Online Support
Any Questions? feel free to contact us