Open AccessHydrogen Production from Ammonia Using Sodium Amide
Author(s) -
William I. F. David,
Joshua W. Makepeace,
Samantha K. Callear,
Hazel M. A. Hunter,
James D. Taylor,
Thomas J. Wood,
Martin O. Jones
Publication year - 2014
Publication title -
journal of the american chemical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 7.115
H-Index - 612
eISSN - 1520-5126
pISSN - 0002-7863
DOI - 10.1021/ja5042836
Subject(s) - chemistry , catalysis , decomposition , ammonia , hydrogen production , inorganic chemistry , nickel , hydrogen , ammonia production , cracking , sodium , hydrogen storage , fluid catalytic cracking , chemical engineering , organic chemistry , engineering
This paper presents a new type of process for the cracking of ammonia (NH3) that is an alternative to the use of rare or transition metal catalysts. Effecting the decomposition of NH3 using the concurrent stoichiometric decomposition and regeneration of sodium amide (NaNH2) via sodium metal (Na), this represents a significant departure in reaction mechanism compared with traditional surface catalysts. In variable-temperature NH3 decomposition experiments, using a simple flow reactor, the Na/NaNH2 system shows superior performance to supported nickel and ruthenium catalysts, reaching 99.2% decomposition efficiency with 0.5 g of NaNH2 in a 60 sccm NH3 flow at 530 °C. As an abundant and inexpensive material, the development of NaNH2-based NH3 cracking systems may promote the utilization of NH3 for sustainable energy storage purposes.
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