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Role of Modification Agent Coverage in Hydrogen Generation by the Reaction of Al with Water
Author(s) -
Deng ZhenYan,
Liu WenHui,
Gai WeiZhuo,
Sakka Yoshio,
Ye Jinhua,
Ou ZhongWen
Publication year - 2010
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1551-2916.2010.03875.x
Subject(s) - hydrogen , microstructure , materials science , decomposition , particle (ecology) , particle size , chemical engineering , phase (matter) , surface modification , particle size distribution , hydrogen production , hydrogen storage , aluminium , metallurgy , chemistry , organic chemistry , alloy , oceanography , engineering , geology
Previous works indicated that Al particle surfaces could be modified by fine γ‐Al 2 O 3 grains, which can be used as a hydrogen‐generation material, where the fine γ‐Al 2 O 3 grains were produced by the decomposition of the Al(OH) 3 phase in the mixture. In this work, commercially available γ‐Al 2 O 3 powder was directly used as the modification agent and mixed with Al powder and heat treated at an elevated temperature. It was found that the modified Al powder produced by directly using γ‐Al 2 O 3 has an obvious shorter time for complete hydrogen generation than that using Al(OH) 3 ‐produced γ‐Al 2 O 3 . Microstructure analyses revealed that directly using γ‐Al 2 O 3 powder has a better coverage of fine γ‐Al 2 O 3 grains on Al particle surfaces than the Al(OH) 3 ‐produced γ‐Al 2 O 3 . This implies that a uniform distribution of modification agents on Al particle surfaces is an important factor for the Al–water reaction dynamics.