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Development of ceria-supported sulfur tolerant nanocatalysts: Pd-based formulations

Paper ID Volume ID Publish Year Pages File Format Full-Text
44006 45999 2007 12 PDF Available
Title
Development of ceria-supported sulfur tolerant nanocatalysts: Pd-based formulations
Abstract

The conversion of logistics fuels (JP-5, JP-8, Jet-A and diesel) to hydrogen by steam reforming is attractive but poses great challenge since these fuels contain sulfur up to about 3000 ppm leading to catalyst deactivation due to sulfur poisoning. In this paper, we report the fabrication of nominally doped nanoscale ceria-supported palladium catalyst matrices for their performance evaluation in sulfur-laden fuel streams. Systematic structural and microstructural characterization of the catalysts was carried out before and after the steam reforming and simulated experiments in sulfur containing streams (50 ppm < S < 1000 ppm) over a wide range of temperature and duration, to speculate and understand the deactivation mechanism and the sulfur tolerance aspects. Steam reforming of toluene as a model fuel without or with 50 ppm sulfur (as thiophene) was carried out at 825 °C and steam to carbon (S/C) ratio of 3. It was found that the addition of metal oxide additives yielded more stable and sulfur-tolerant formulation.

Graphical abstractPerformance of nominally doped nanoscale ceria-supported palladium catalyst matrices in sulfur-laden fuel streams was evaluated. Addition of metal oxide additives provides higher stability and sulfur-tolerance.Figure optionsDownload full-size imageDownload as PowerPoint slide

Keywords
Nanoscale doped-ceria supports; Noble metals; Metal oxides; Logistic fuels; Steam reforming; Electron microscopy; Sulfur-tolerance; Coking phenomenon
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Development of ceria-supported sulfur tolerant nanocatalysts: Pd-based formulations
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volume 332, Issue 2, 20 November 2007, Pages 225–236
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