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Volume 188, 2016
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Ammonia decomposition catalysis using lithium–calcium imide

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Abstract

Lithium–calcium imide is explored as a catalyst for the decomposition of ammonia. It shows the highest ammonia decomposition activity yet reported for a pure light metal amide or imide, comparable to lithium imide–amide at high temperature, with superior conversion observed at lower temperatures. Importantly, the post-reaction mass recovery of lithium–calcium imide is almost complete, indicating that it may be easier to contain than the other amide–imide catalysts reported to date. The basis of this improved recovery is that the catalyst is, at least partially, solid across the temperature range studied under ammonia flow. However, lithium–calcium imide itself is only stable at low and high temperatures under ammonia, with in situ powder diffraction showing the decomposition of the catalyst to lithium amide–imide and calcium imide at intermediate temperatures of 200–460 °C.

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Submitted
18 Nov 2015
Accepted
24 Nov 2015
First published
14 Dec 2015

Faraday Discuss., 2016,188, 525-544
Article type
Paper

Ammonia decomposition catalysis using lithium–calcium imide

J. W. Makepeace, H. M. A. Hunter, T. J. Wood, R. I. Smith, C. A. Murray and W. I. F. David, Faraday Discuss., 2016, 188, 525
DOI: 10.1039/C5FD00179J

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