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Hydrogen from ethylene glycol by supercritical water reforming using noble and base metal catalysts

Paper ID Volume ID Publish Year Pages File Format Full-Text
46504 46440 2012 9 PDF Available
Title
Hydrogen from ethylene glycol by supercritical water reforming using noble and base metal catalysts
Abstract

Catalytic reforming of ethylene glycol (5 and 15 wt%) in supercritical water (450 °C and 250 bar) in the presence of alumina supported mono- and bi-metallic catalysts based on Ir, Pt and Ni was studied. Pt catalyst showed the highest hydrogen yields compared to Ir and Ni. Varying the Pt loading (0.3–1.5 wt%) showed that the intrinsic reforming activities improved with decreasing Pt loadings. However, a lower Pt loading had a large negative effect on the H2 selectivity and catalyst stability. It was found that the presence of Ni in a Pt–Ni bimetallic catalyst improved hydrogen yields by suppressing methane formation. Moreover, the presence of Ni also enhanced catalyst stability. Results reported here were obtained at WHSV of 18 h−1. The Pt–Ni/Al2O3 having a total metal loading of 1.5 wt% (molar ratio Pt:Ni = 1), is identified as a promising catalyst for the reforming of ethylene glycol in supercritical water and may prove suitable for various other SCWG applications.

Graphical abstractFigure optionsDownload full-size imageDownload as PowerPoint slideHighlights► Catalytic reforming of ethylene glycol in supercritical water is studied in the presence Pt based mono- and bi-metallic catalysts (PtNi). ► Pt catalyst showed the highest hydrogen yields compared to Ir and Ni. ► Addition of Ni to the Pt in a PtNi bimetallic catalyst improved hydrogen yields by suppressing methane formation. ► Bimetallic catalysts were found to be more active and stable than the mono-metallic catalysts.

Keywords
Sustainable; Renewable; Supercritical water; Reforming; Hydrogen; Catalysts; Ethylene glycol
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Hydrogen from ethylene glycol by supercritical water reforming using noble and base metal catalysts
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis B: Environmental - Volumes 111–112, 12 January 2012, Pages 536–544
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