scholarly journals Isotopic studies of the ammonia decomposition reaction using lithium imide catalyst

2017 ◽  
Vol 19 (6) ◽  
pp. 4719-4724 ◽  
Author(s):  
Thomas J. Wood ◽  
Joshua W. Makepeace ◽  
William I. F. David
Keyword(s):  
Decomposition Reaction ◽  
Ammonia Decomposition ◽  
Rich Phase ◽  
Bulk Surface ◽  
Lithium Imide ◽  
Isotopic Studies ◽  
Decomposition Experiments

15N-Labelled ammonia decomposition experiments over lithium imide catalyst reveal a bulk-surface mechanism via a lithium-rich phase.

scholarly journals Ammonia decomposition catalysis using non-stoichiometric lithium imide

2015 ◽  
Vol 6 (7) ◽  
pp. 3805-3815 ◽  
Author(s):  
Joshua W. Makepeace ◽  
Thomas J. Wood ◽  
Hazel M. A. Hunter ◽  
Martin O. Jones ◽  
William I. F. David
Keyword(s):  
Catalytic Reaction ◽  
High Purity ◽  
Ammonia Decomposition ◽  
Lithium Imide ◽  
Isotopic Studies ◽  
High Purity Hydrogen

The non-stoichiometric lithium imide–amide system effectively decomposes ammonia to its constituents, hydrogen and nitrogen. Isotopic studies show that this bulk catalytic reaction has the potential to generate high-purity hydrogen for future energy and transport applications.

Isotopic studies of the ammonia decomposition reaction mediated by sodium amide

2015 ◽  
Vol 17 (35) ◽  
pp. 22999-23006 ◽  
Author(s):  
Thomas J. Wood ◽  
Joshua W. Makepeace ◽  
Hazel M. A. Hunter ◽  
Martin O. Jones ◽  
William I. F. David
Keyword(s):  
Transition Metal ◽  
Isotope Effect ◽  
Kinetic Isotope Effect ◽  
Reaction Pathway ◽  
Decomposition Reaction ◽  
Transition Metal Catalysts ◽  
Ammonia Decomposition ◽  
Kinetic Isotope ◽  
Isotopic Studies ◽  
Sodium Amide

Ammonia decomposition by sodium amide shows a significant primary kinetic isotope effect, indicating an alternative reaction pathway than for transition metal catalysts.

scholarly journals Bulk phase behavior of lithium imide–metal nitride ammonia decomposition catalysts

2018 ◽  
Vol 20 (35) ◽  
pp. 22689-22697 ◽  
Author(s):  
Joshua W. Makepeace ◽  
Thomas J. Wood ◽  
Phillip L. Marks ◽  
Ronald I. Smith ◽  
Claire A. Murray ◽  
...  
Keyword(s):  
Phase Behavior ◽  
Powder Diffraction ◽  
Ammonia Decomposition ◽  
Bulk Phase ◽  
Metal Nitride ◽  
X Ray ◽  
Composite Catalysts ◽  
Production Of Hydrogen ◽  
Lithium Imide

Lithium imide is a promising new catalyst for the production of hydrogen from ammonia. This study reports the use of neutron and X-ray powder diffraction to investigate the presence of ternary nitrides in lithium-imide/metal nitride composite catalysts.

Impact of the ammonia decomposition reaction over an anode on direct ammonia-fueled protonic ceramic fuel cells

2020 ◽  
Vol 4 (10) ◽  
pp. 5238-5246 ◽  
Author(s):  
Kazunari Miyazaki ◽  
Hiroki Muroyama ◽  
Toshiaki Matsui ◽  
Koichi Eguchi
Keyword(s):  
Fuel Cells ◽  
Decomposition Reaction ◽  
Ammonia Decomposition ◽  
Ceramic Fuel ◽  
Decomposition Behavior ◽  
Ceramic Fuel Cells

The relation between the performance of direct ammonia-fueled SOFCs and the ammonia decomposition behavior over an anode was studied under various ammonia supply conditions.

COx Free Hydrogen Production From Ammonia Decomposition Over Platinum Based Siliceous Materials

2012 ◽  
Vol 10 (1) ◽  
Author(s):  
Dilek Varisli ◽  
Tugba Rona
Keyword(s):  
Flow Reactor ◽  
High Surface ◽  
High Surface Area ◽  
Fixed Bed ◽  
Space Velocity ◽  
Decomposition Reaction ◽  
Ammonia Decomposition ◽  
One Pot ◽  
Free Hydrogen ◽  
Synthesis Procedure

Abstract Ammonia has become an important source for hydrogen especially for fuel cell applications that require COx free hydrogen. In this study, high surface area Pt incorporated mesoporous siliceous materials were prepared for ammonia decomposition reaction to produce clean hydrogen. The results of a fixed bed flow reactor tests, conducted using pure ammonia showed that Pt-SiO2 type catalysts which were prepared by a one-pot hydrothermal synthesis procedure were very active in ammonia decomposition, such as 72% conversion was reached at 500°C at a gas hourly space velocity of 5,100 ml/h.gcat over the catalyst prepared at Pt/Si mol ratio of 0.03. Activity of the synthesized catalysts increased with an increase in Pt loading. Platinum incorporated siliceous materials prepared by impregnation procedures were also tested in ammonia decomposition and highly promising results were obtained.

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