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CeO2-supported Pt/Ni catalyst for the renewable and clean H2 production via ethanol steam reforming

Paper ID Volume ID Publish Year Pages File Format Full-Text
45309 46409 2014 12 PDF Available
Title
CeO2-supported Pt/Ni catalyst for the renewable and clean H2 production via ethanol steam reforming
Abstract

The steam reforming of biomass-derived ethanol is a promising method for hydrogen production. It needs the development of efficient catalysts, especially when the reaction is carried out at temperature lower than 600 °C. The performances of a bimetallic sample, based on Pt (3 wt.%) and Ni (10 wt.%) and supported on CeO2 were investigated, in terms of activity, selectivity and stability. Very interesting results were obtained in the range 250–600 °C, even with a stoichiometric water/ethanol molar ratio: the ethanol was completely converted at T ≥ 300 °C, with a products distribution extremely close to the equilibrium calculations. Moreover, the selectivity towards the desired compounds was very high, and as a consequence, the sample showed a very low coke selectivity (<1%) and a high stability, that was further improved with higher amount of water in the feed stream. The analysis of the products distribution as a function of contact time (3–600 ms) and temperature (340–480 °C) and the temperature programmed desorption (TPD) experiments, were used to hypothesize the possible reactions involved, in order to develop a mathematical model, able to simulate the kinetic behaviour of the low temperature-ethanol steam reforming over Pt/Ni/CeO2. Finally, a possible Pt/Ni/CeO2 catalyzed reaction pathway at 370 °C, was formulated, that includes the following steps: ethanol adsorption followed by dehydrogenation to acetaldehyde; intermediate decomposition and reforming to CH4, CO, H2 and CO2; CO-WGS and CO2 methanation reaction.

Graphical abstractFigure optionsDownload full-size imageDownload as PowerPoint slideHighlights► Pt/Ni/CeO2 showed promising performance at low temperature. ► The products distribution was close to the equilibrium. ► Few carbon depositions could occur, but not linked to the active sites. ► The water promotes the gasification reactions. ► The reaction pathway includes 6 reactions.

Keywords
Hydrogen; Ethanol; Bimetallic; Steam reforming; Low temperature
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CeO2-supported Pt/Ni catalyst for the renewable and clean H2 production via ethanol steam reforming
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis B: Environmental - Volume 145, February 2014, Pages 73–84
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