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Methanation of Carbon Supports of Ruthenium Catalysts for Ammonia Synthesis. Review
https://doi.org/10.18412/1816-0387-2016-4-20-27
Abstract
Methanation of carbon supports in a hydrogen-containing medium results in degradation of the support and sintering of the active component of ruthenium catalysts for ammonia synthesis. In the review, key publications on approaches to inhibiting methanation are analyzed. It is demonstrated that the solution algorithm is, in general, determined. This is graphitization of the carbon supports at high temperatures (up to 2000 °C) and addition of promoter such as alkali (Cs, K) and alkali-earth (Ba) oxides to modify the ruthenium electron state and to prevent the carbon surface from interaction with active hydrogen. The most effective catalyst that does not suffer from methanation at temperature up to 700 °C and hydrogen pressure of 100 atm is identified. The analysis can be useful to choose and prepare Me/C catalysts, where Me is a 8 group metal.
About the Authors
P. G. Tsyrulnikov
Institute for Hydrocarbon Processing, Omsk
Russian Federation
Russian Federation
K. N. Iost
Institute for Hydrocarbon Processing, Omsk
Russian Federation
Russian Federation
N. B. Shitova
Institute for Hydrocarbon Processing, Omsk
Russian Federation
Russian Federation
V. L. Temerev
Institute for Hydrocarbon Processing, Omsk
Russian Federation
Russian Federation
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Review
For citations:
Tsyrulnikov P.G., Iost K.N., Shitova N.B., Temerev V.L. Methanation of Carbon Supports of Ruthenium Catalysts for Ammonia Synthesis. Review. Kataliz v promyshlennosti. 2016;16(4):20-27. (In Russ.) https://doi.org/10.18412/1816-0387-2016-4-20-27
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