Journal ArticleDOI
Kinetics and mechanism of the ammonia synthesis
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In this paper, the reaction rate in stoichiometric mixtures of nitrogen and hydrogen or deuterium has been measured on two different doubly promoted iron catalysts, between 218 and 302 °C, ⅓ and 1 atm and over a 300-fold range of efficiencies.Abstract:
The reaction rate in stoichiometric mixtures of nitrogen and hydrogen or deuterium has been measured on two different doubly promoted iron catalysts, between 218 and 302 °C, ⅓ and 1 atm and over a 300-fold range of efficiencies. The kinetic data as well as the isotope effect indicate that the rate-determining step is the chemisorption of nitrogen on a surface mainly covered with NH radicals. The presence on the surface of NH radicals instead of nitrogen atoms opens new perspectives on the kinetics and mechanism of ammonia synthesis.read more
Citations
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Journal ArticleDOI
Catalysts for nitrogen reduction to ammonia
Shelby L. Foster,Sergio I. Perez Bakovic,Royce D. Duda,Sharad Maheshwari,Ross D. Milton,Shelley D. Minteer,Michael J. Janik,Julie N. Renner,Lauren F. Greenlee +8 more
TL;DR: A review of the state of the art and scientific needs for heterogeneous electrocatalysts for electrochemical reduction of dinitrogen to ammonia can be found in this article, with a particular focus on how mechanistic understanding informs catalyst design.
Book ChapterDOI
The Kinetics of Some Industrial Heterogeneous Catalytic Reactions
TL;DR: In this paper, the main results of the studies of the kinetics of some industrial heterogeneous catalytic reactions are discussed. But the authors focus on the mass transfer in heterogeneous catalysis.
Journal ArticleDOI
Cobalt molybdenum bimetallic nitride catalysts for ammonia synthesis: Part 2. Kinetic study
Ryoichi Kojima,Ken-ichi Aika +1 more
TL;DR: In this paper, bimetallic molybdenum nitride catalysts were prepared and their kinetic analyses were done and the standard rate of ammonia synthesis was measured with a 0.4 g of catalyst at 588-673 K under 0.1-3.1 MPa with a flow rate of 60mlmin − 1 of N 2 + 3H 2.
Journal ArticleDOI
Cobalt molybdenum bimetallic nitride catalysts for ammonia synthesis: Part 1. Preparation and characterization
Ryoichi Kojima,Ken-ichi Aika +1 more
TL;DR: In this paper, a Cesium-promoted cobalt molybdenum bimetallic nitride Co 3 Mo 3 N catalyst was found to give higher productivity of ammonia than a doubly promoted iron catalyst.
Journal ArticleDOI
Plasma-driven catalysis: green ammonia synthesis with intermittent electricity
Kevin Hendrik Reindert Rouwenhorst,Yannick Engelmann,Kevin van ’t Veer,Kevin van ’t Veer,Rolf Sybren Postma,Annemie Bogaerts,Leon Lefferts +6 more
TL;DR: A review of the literature on plasma-driven ammonia synthesis is presented in this article, where the authors distinguish between mechanisms for ammonia synthesis in the presence of a plasma, with and without a catalyst, for different plasma conditions.
References
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Journal ArticleDOI
Adsorption of Nitrogen and the Mechanism of Ammonia Decomposition Over Iron Catalysts
Journal ArticleDOI
The Catalytic Decomposition of Ammonia over Iron Synthetic Ammonia Catalysts
Katharine S. Love,Paul H. Emmett +1 more
Journal ArticleDOI
The Rate Equation of Ammonia‐Synthesis on Iron‐Type Catalysts of Different Composition
TL;DR: In this article, an improved version of the Temkin and Pyzhev equation for ammonia decomposition on a singly promoted iron catalyst between 400 and 450C is presented.
Journal ArticleDOI
The Rate Expression of High Pressure Ammonia Synthesis in Which Industrial Iron Catalyst is Employed.
Hiroshi Kubota,Masuo Shindo +1 more
TL;DR: In this paper, the authors proposed a rate expression for high pressure ammonia synthesis in which industrial iron catalyst is employed, which is the case where the rate-determining step is the dissociated adsorption of nitrogen molecule and the active site of catalyst is partly covered with atomic nitrogen.
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