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Ni/Ce1−xMx catalyst generated from metallo-organic network for autothermal reforming of diesel surrogate

Paper ID Volume ID Publish Year Pages File Format Full-Text
40334 45850 2013 8 PDF Available
Title
Ni/Ce1−xMx catalyst generated from metallo-organic network for autothermal reforming of diesel surrogate
Abstract

•Surface-active La2O3 dopes both the supported-Ni particles and ceria.•The doping of La3+ in NiO could toughen the reducibility of the oxide and promote its dispersion.•The resulting catalyst exhibits improved ATR catalytic reactivity and resistivity against C/S poisoning.

This work investigated the production of hydrogen from reforming a diesel surrogate by using doped ceria-supported Ni catalysts. The catalysts were synthesized from a metallo-organic network (MON) comprising metal ions of interest. Pyrolyzing the MON and subsequent calcining the oxide mixture produced from the pyrolysis gave rise to a composite of a doped ceria [denoted by Ce1−(x+y)LaxGdy, x + y ≤ 0.2] and NiO with a substantial degree of mixing. The structural characterizations (XRD and TPR) revealed a minor doping level of La3+ in the supported Ni0 domains, which was formed through an interfacial oxide phase containing both metal ions. A catalyst, Ni/Ce1−(x+y)LaxGdy, was generated from a respective composite through in situ reducing of NiO in the system of autothermal reforming of a diesel surrogate. The fuel comprised n-dodecane, 10 wt% naphthalene and 100 ppm sulfur (from thiophene). Amid the various catalysts investigated, Ni/Ce0.9La0.1 is most effective in fuel conversion, hydrogen yield and stability against coking and sulfur poisoning. They are superior over the corresponding outcomes of the impregnation catalyst counterpart. This large enhancement is attributed to the unique pyrolyzing course of MON precursor, leading to highly dispersed La3+-doped Ni0 nano catalytic sites on the Ce0.9La0.1 support ultimately.

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Keywords
Ceria; Doping; Supported-Ni catalyst; Autothermal reforming; Hydrogen
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Ni/Ce1−xMx catalyst generated from metallo-organic network for autothermal reforming of diesel surrogate
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volume 459, 24 May 2013, Pages 89–96
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