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Hydrogen generation from noncatalytic hydrothermolysis of ammonia borane for vehicle applications
Author(s) -
Diwan Moiz,
Hwang Hyun Tae,
AlKukhun Ahmad,
Varma Arvind
Publication year - 2011
Publication title -
aiche journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.958
H-Index - 167
eISSN - 1547-5905
pISSN - 0001-1541
DOI - 10.1002/aic.12240
Subject(s) - ammonia borane , hydrogen storage , hydrogen , ammonia , yield (engineering) , hydrogen production , chemical engineering , chemistry , catalysis , kinetics , hydrolysis , thermal decomposition , atmospheric temperature range , decomposition , materials science , organic chemistry , thermodynamics , engineering , composite material , physics , quantum mechanics
Ammonia borane (AB) is a promising hydrogen storage material as it contains 19.6 wt % hydrogen. In this article, our recently developed hydrothermolysis approach to release hydrogen is studied over a wide range of AB concentrations (6–88 wt %), at pressure 14.7 and 200 psia, and temperature 85–135°C. It is shown that with increasing AB concentration up to 77 wt %, the H 2 yield increases, and that the role of thermolysis, when compared with hydrolysis, increases. The maximum hydrogen storage capacity, obtained at 77 wt % AB and T reactor ∼ 85°C along with rapid kinetics, was 11.6 and 14.3 wt % at pressure 14.7 and 200 psia, respectively. To our knowledge, on a material basis, the AB hydrothermolysis process is the first one to provide such high hydrogen yield values at near PEM fuel cell operating temperatures without use of catalyst, and thus is promising for use in fuel cell‐based vehicle applications. © 2010 American Institute of Chemical Engineers AIChE J, 2011