Temperature-Programmed Adsorption and Desorption of Nitrogen on Iron Ammonia Synthesis Catalysts

1994 ◽  
Vol 150 (2) ◽  
pp. 345-355 ◽  
Author(s):  
B. Fastrup
Keyword(s):  
Ammonia Synthesis ◽  
Adsorption And Desorption ◽  
Synthesis Catalysts ◽  
Temperature Programmed

scholarly journals MÖSSBAUER STUDIES OF THE ACTIVATION OF AMMONIA SYNTHESIS CATALYSTS

1976 ◽  
Vol 37 (C6) ◽  
pp. C6-245-C6-248 ◽  
Author(s):  
B. S. CLAUSEN ◽  
S. MØRUP ◽  
H. TOPSØE ◽  
R. CANDIA ◽  
E. J. JENSEN ◽  
...  
Keyword(s):  
Ammonia Synthesis ◽  
Mössbauer Studies ◽  
Synthesis Catalysts

Improved stability and activity of Fe-based catalysts through strong metal support interactions due to extrinsic oxygen vacancies in Ce0.8Sm0.2O2−δ for the efficient synthesis of ammonia

2020 ◽  
Vol 8 (32) ◽  
pp. 16676-16689 ◽  
Author(s):  
John Humphreys ◽  
Rong Lan ◽  
Shigang Chen ◽  
Shanwen Tao
Keyword(s):  
Catalytic Activity ◽  
Oxygen Vacancies ◽  
Ammonia Synthesis ◽  
Efficient Synthesis ◽  
Anion Vacancies ◽  
Metal Support ◽  
Improved Stability ◽  
Synthesis Catalysts ◽  
Metal Support Interactions

The SMSI between Fe and oxygen vacancies in Ce0.8Sm0.2O2−δ helps to weaken and break the strong NN bonds in N2, increasing the catalytic activity. Materials with anion vacancies improve oxygenate tolerance property of ammonia synthesis catalysts.

The Study of Iron Catalyst for Ammonia Synthesis in Chemical Engineering

2012 ◽  
Vol 577 ◽  
pp. 97-100
Author(s):  
Dong Mei Zhao ◽  
Xue Peng Liu
Keyword(s):  
Chemical Engineering ◽  
Hydrogen Adsorption ◽  
Ammonia Synthesis ◽  
Iron Catalyst ◽  
Nitrogen Adsorption ◽  
Temperature Programmed Desorption ◽  
Iron Catalysts ◽  
Synthesis Activity ◽  
Temperature Programmed ◽  
Adsorption Intensity

The temperature programmed desorption technique is used to study the hydrogen adsorption on the catalytic surface of fused iron catalysts with different oxide precursors in chemical engineering. The different catalysts desorption active energy, desorped temperature and their amouts desorped have been attained. The desorption energies, desorped temperatures and desorption amounts have been related to the iron ratio (Fe2+/Fe3+). It is compared with the curve of ammonia synthesis activity against iron ratio. The inhibition of hydrogen in the ammonia synthesis reaction is verified, the adsorption intensity of hydrogen controls the inhibition to nitrogen adsorption

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