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author:

Ni, Jun (Ni, Jun.) [1] (Scholars:倪军) | Liu, Ben-Yao (Liu, Ben-Yao.) [2] | Zhu, Yong-Long (Zhu, Yong-Long.) [3] | Chen, Geng (Chen, Geng.) [4] | Lin, Jian-Xin (Lin, Jian-Xin.) [5] (Scholars:林建新) | Wei, Ke-Mei (Wei, Ke-Mei.) [6]

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Abstract:

The thermal stability of the Ru-Ba-K/AC catalysts promoted with single structural additive is poor for ammonia synthesis under the conditions of high temperature and high pressure, but the stability could be sufficient improved by addition of samarium promoter. Results show that the stability is remarkably improved and catalyst activity is weak affected when samarium content was 0.5%. The stability is further strengthen, but a significant reduction of the catalytic activity is observed when samarium content is higher than 1%. The main reasons for significantly improved stability could be that the doping improved the sintering resistance of the structural additives, and methanation resistance by suppressing the hydrogen adsorption on the surface of the ruthenium.

Keyword:

Catalyst activity Convergence of numerical methods Doping (additives) Kinetic theory Samarium Sintering Stability Thermodynamic properties

Community:

  • [ 1 ] [Ni, Jun]National Engineering Research Center of Chemical Fertilizer Catalyst, Fuzhou University, Fuzhou 350002, China
  • [ 2 ] [Liu, Ben-Yao]National Engineering Research Center of Chemical Fertilizer Catalyst, Fuzhou University, Fuzhou 350002, China
  • [ 3 ] [Zhu, Yong-Long]National Engineering Research Center of Chemical Fertilizer Catalyst, Fuzhou University, Fuzhou 350002, China
  • [ 4 ] [Chen, Geng]National Engineering Research Center of Chemical Fertilizer Catalyst, Fuzhou University, Fuzhou 350002, China
  • [ 5 ] [Lin, Jian-Xin]National Engineering Research Center of Chemical Fertilizer Catalyst, Fuzhou University, Fuzhou 350002, China
  • [ 6 ] [Wei, Ke-Mei]National Engineering Research Center of Chemical Fertilizer Catalyst, Fuzhou University, Fuzhou 350002, China

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Source :

Journal of Molecular Catalysis

ISSN: 1001-3555

CN: 62-1227/O6

Year: 2013

Issue: 4

Volume: 27

Page: 371-376

Cited Count:

WoS CC Cited Count: 0

SCOPUS Cited Count:

ESI Highly Cited Papers on the List: 0 Unfold All

WanFang Cited Count:

Chinese Cited Count:

30 Days PV: 4

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