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Preparation and performance of noble metal phosphides supported on silica as new hydrodesulfurization catalysts

Paper ID Volume ID Publish Year Pages File Format Full-Text
41921 45904 2010 8 PDF Available
Title
Preparation and performance of noble metal phosphides supported on silica as new hydrodesulfurization catalysts
Abstract

Preparation of noble metal (NM) (Rh, Pd, Ru, Pt) phosphide species and their catalytic activities for hydrodesulfurization (HDS) of thiophene were investigated. Noble metal phosphides (NMXPY) catalysts were prepared by reduction of P-added NM (NM-P) supported on silica (SiO2) with hydrogen. Hydrogen consumption peaks at around 350–700 °C, which were attributed to the formation of NMXPY, were observed in temperature-programmed reduction (TPR) spectra of all NM-P/SiO2. Furthermore, X-ray diffraction (XRD) patterns of NM-P/SiO2 indicate that NMXPY (Rh2P, Pd4.8P, Ru2P, PtP2) were formed by hydrogen reduction at high temperature. The reduction temperature strongly affected HDS activities of NM-P/SiO2 catalysts. The NM-P/SiO2 catalysts, other than Pt, showed higher HDS activities than NM/SiO2 catalysts. The HDS activity of the Rh-P/SiO2 catalyst was the highest among those of NM-P/SiO2 catalysts. This activity was higher than that of the Ni-P catalyst and was the same as that of pre-sulfided CoMoP/Al2O3 catalyst. Furthermore, the Rh-P/SiO2 catalyst showed stable activity even after reaction for 30 h. The XRD, transmission electron microscopy (TEM), and energy dispersive X-ray spectroscopy (EDS) results revealed that the formation of small Rh2P particles and suitable P addition to form Rh2P caused the high HDS activity of the Rh-P catalyst.

Graphical abstractFigure optionsDownload full-size imageDownload high-quality image (61 K)Download as PowerPoint slideResearch highlights▶The P-added noble metal (NM-P)/SiO2 catalysts, except Pt, showed higher HDS activities than noble metal (NM)/SiO2 catalysts. ▶The HDS activity of the Rh-P/SiO2 catalyst was the highest among those of NM-P/SiO2 catalysts. ▶This activity was higher than that of the Ni-P catalyst and was the same as that of the pre-sulfided CoMoP/Al2O3 HDS catalyst.

Keywords
Hydrodesulfurization; Thiophene; Noble metal phosphide catalyst
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Preparation and performance of noble metal phosphides supported on silica as new hydrodesulfurization catalysts
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volume 386, Issues 1–2, 30 September 2010, Pages 171–178
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
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us