In situ XAS study of an improved natural phosphate catalyst for hydrogen production by reforming of methane
Identifieur interne : 000110 ( Main/Exploration ); précédent : 000109; suivant : 000111In situ XAS study of an improved natural phosphate catalyst for hydrogen production by reforming of methane
Auteurs : Moctar O. Abba [Espagne, Maroc] ; Victor M. Gonzalez-Delacruz [Espagne] ; Gerardo Colon [Espagne] ; Said Sebti [Maroc] ; Alfonso Caballero [Espagne]Source :
- Applied catalysis. B, Environmental [ 0926-3373 ] ; 2014.
Descripteurs français
- Pascal (Inist)
- Wicri :
English descriptors
- KwdEn :
Abstract
Some nickel catalysts supported on natural phosphate (NP) have been tested for the dry methane reforming reaction. Although the original impregnated 15%Ni/NP catalyst has no activity at all, the modification of the support by mechano-chemical and/or acid treatment strongly improved the catalytic performance, yielding a series of very active and stable catalysts. The chemical and physical characterization by X-ray diffraction (XRD), temperature programmed reduction (TPR), in situ X-ray absorption spectroscopy (XAS) and other techniques have shown that these treatments mainly modify the interaction between the nickel phase and the support surface. The nickel ions occupy calcium position in the surface of the phosphate phase, which stabilizes and improves the dispersion of nickel species. The final reduced catalysts present a much better dispersed metallic phase interacting with the NP surface, which has been identified as responsible for the observed outstanding catalytic performances.
Affiliations:
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Le document en format XML
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<profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Catalyst</term>
<term>Catalytic reaction</term>
<term>Environmental protection</term>
<term>Heterogeneous catalysis</term>
<term>Hydrogen</term>
<term>In situ</term>
<term>Methane</term>
<term>Nickel</term>
<term>Phosphates</term>
<term>Reforming</term>
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<keywords scheme="Pascal" xml:lang="fr"><term>In situ</term>
<term>Phosphate</term>
<term>Catalyseur</term>
<term>Hydrogène</term>
<term>Reformage</term>
<term>Méthane</term>
<term>Nickel</term>
<term>Catalyse hétérogène</term>
<term>Réaction catalytique</term>
<term>Protection environnement</term>
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<front><div type="abstract" xml:lang="en">Some nickel catalysts supported on natural phosphate (NP) have been tested for the dry methane reforming reaction. Although the original impregnated 15%Ni/NP catalyst has no activity at all, the modification of the support by mechano-chemical and/or acid treatment strongly improved the catalytic performance, yielding a series of very active and stable catalysts. The chemical and physical characterization by X-ray diffraction (XRD), temperature programmed reduction (TPR), in situ X-ray absorption spectroscopy (XAS) and other techniques have shown that these treatments mainly modify the interaction between the nickel phase and the support surface. The nickel ions occupy calcium position in the surface of the phosphate phase, which stabilizes and improves the dispersion of nickel species. The final reduced catalysts present a much better dispersed metallic phase interacting with the NP surface, which has been identified as responsible for the observed outstanding catalytic performances.</div>
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<name sortKey="Caballero, Alfonso" sort="Caballero, Alfonso" uniqKey="Caballero A" first="Alfonso" last="Caballero">Alfonso Caballero</name>
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<name sortKey="Gonzalez Delacruz, Victor M" sort="Gonzalez Delacruz, Victor M" uniqKey="Gonzalez Delacruz V" first="Victor M." last="Gonzalez-Delacruz">Victor M. Gonzalez-Delacruz</name>
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<name sortKey="Sebti, Said" sort="Sebti, Said" uniqKey="Sebti S" first="Said" last="Sebti">Said Sebti</name>
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