Journal
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
Volume 43, Issue 37, Pages 17643-17655Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ijhydene.2018.07.103
Keywords
Hydrogen; Ethanol; Nickel; Oxyhydride; INS
Categories
Funding
- Centre National de la Recherche Scientifique France
- National Special Funds of China [C6176102]
- ECL Lille
- Region Hauts de France
- China Scholarship Council
- Institut Laue Langevin (ILL) Grenoble France
- Chevreul Institute [FR 2638]
- Ministere de l'enseignement Superieur et de la Recherche
- FEDER
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Mg(2)AlNi(X)H(Z)O(Y )nano-oxyhydrides formation is evidenced during pre-treatment in H-2 at 450 degrees C of Mg2AlNiXOY nano-compounds leading to highly performant catalysts in ethanol conversion and H-2 formation, particularly at low temperature, through catalytic steam reforming (SRE) and oxidative steam reforming (OSRE). Total conversion of ethanol is obtained in SRE and OSRE with high stability. A higher production of H-2 (60 L h(-1) g(cat)(-1)) can be achieved at a reaction temperature of 300 degrees C in OSRE conditions compared to SRE (10 L h(-1) g(cat)(-1) ) mainly because of a beneficial use of a high concentration of ethanol (14 mol %) in presence of O-2 . Moreover, carbon formation is decreased and a much lower input of energy of 50 degrees C is used to get a temperature of 300 degrees C when O-2 is added. Different physico-chemical characterizations and in particular in H-2 (TPR, H-2-XRD, INS) and after tests allow to conclude that the presence of Ni2+ cations in strong interaction with other cations, anionic vacancies and hydride species on and inside the solid play an important role in the catalytic performance (conversion and selectivity) and stability. (C)2018 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.
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