Novel multi-walled nanotubes-supported and alkali-promoted Ru catalysts for ammonia synthesis under atmospheric pressure

A novel ammonia synthesis catalyst, alkali-promoted ruthenium supported on multi-walled nanotubes (MWNT), has been developed. Various alkali-promoters and carbon-based supports were compared. The effects of the contents of Ru and K, the treatment of MWNT, and the reaction temperature on ammonia synt...

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Bibliographic Details
Published in:Applied surface science 2001-08, Vol.180 (3), p.328-335
Main Authors: Chen, Hong-Bo, Lin, Jing-Dong, Cai, Yun, Wang, Xin-Ying, Yi, Jun, Wang, Jin, Wei, Guang, Lin, Yin-Zhong, Liao, Dai-Wei
Format: Article
Language:English
Subjects:
Alkali
Alkaline earth
Ammonia synthesis
Carbon
Catalysis
Catalysts: preparations and properties
Chemistry
Exact sciences and technology
General and physical chemistry
Multi-walled carbon nanotubes
Ruthenium
Theory of reactions, general kinetics. Catalysis. Nomenclature, chemical documentation, computer chemistry
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Summary:A novel ammonia synthesis catalyst, alkali-promoted ruthenium supported on multi-walled nanotubes (MWNT), has been developed. Various alkali-promoters and carbon-based supports were compared. The effects of the contents of Ru and K, the treatment of MWNT, and the reaction temperature on ammonia synthesis activity were investigated. It was found that, as a support, the MWNT is much better than other carbon-based supports. The yield of NH 3 was 47.423 ml NH 3/h g-cat at 693 K, at atmospheric pressure and N 2/3H 2 flow-rate of 1800 ml/h for the catalyst with K/Ru/MWNT = 4/4/100 (w/w).
ISSN:0169-4332
1873-5584
DOI:10.1016/S0169-4332(01)00374-9