Hydrogen Production from Ammonia Using Sodium Amide

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• 作者：William I. F. David ; Joshua W. Makepeace ; Samantha K. Callear ; Hazel M. A. Hunter ; James D. Taylor ; Thomas J. Wood ; Martin O. Jones
• 刊名：Journal of the American Chemical Society
• 出版年：2014
• 出版时间：September 24, 2014
• 年：2014
• 卷：136
• 期：38
• 页码：13082-13085
• 全文大小：298K
• ISSN：1520-5126

文摘

This paper presents a new type of process for the cracking of ammonia (NH<sub>3sub>) that is an alternative to the use of rare or transition metal catalysts. Effecting the decomposition of NH<sub>3sub> using the concurrent stoichiometric decomposition and regeneration of sodium amide (NaNH<sub>2sub>) via sodium metal (Na), this represents a significant departure in reaction mechanism compared with traditional surface catalysts. In variable-temperature NH<sub>3sub> decomposition experiments, using a simple flow reactor, the Na/NaNH<sub>2sub> system shows superior performance to supported nickel and ruthenium catalysts, reaching 99.2% decomposition efficiency with 0.5 g of NaNH<sub>2sub> in a 60 sccm NH<sub>3sub> flow at 530 掳C. As an abundant and inexpensive material, the development of NaNH<sub>2sub>-based NH<sub>3sub> cracking systems may promote the utilization of NH<sub>3sub> for sustainable energy storage purposes.