Ammonia Decomposition over Cobalt-Based Silica-Supported Fischer-Tropsch Synthesis Catalysts

Decomposition of ammonia over silica-supported cobalt catalysts for Fischer–Tropsch synthesis has been studied at a pressure of 0.1 MPa, a gas hourly space velocity in the range of 1000–6000 h – 1 , and a temperature in the range of 400–650°C in a tubular fixed bed reactor in a flow-through mode. It...

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Bibliographic Details
Published in:Kinetics and catalysis 2023-04, Vol.64 (2), p.180-190
Main Authors: Yakovenko, R. E., Krasnyakova, T. V., Saliev, A. N., Shilov, M. A., Volik, A. V., Savost’yanov, A. P., Mitchenko, S. A.
Format: Article
Language:English
Subjects:
Aluminum oxide
Ammonia
Catalysis
Catalysts
Chemical synthesis
Chemistry
Chemistry and Materials Science
Cobalt
Decomposition
Fischer-Tropsch process
Fixed beds
Physical Chemistry
Silicon dioxide
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Summary:Decomposition of ammonia over silica-supported cobalt catalysts for Fischer–Tropsch synthesis has been studied at a pressure of 0.1 MPa, a gas hourly space velocity in the range of 1000–6000 h – 1 , and a temperature in the range of 400–650°C in a tubular fixed bed reactor in a flow-through mode. It was found that silica-supported cobalt catalysts for hydrocarbons synthesis via the Fischer–Tropsch protocol also exhibit high activity in ammonia decomposition. Both the activity and hydrogen performance decrease in the series: Co-Ru/SiO 2 > Co-Al 2 O 3 /SiO 2 > Ru/SiO 2 > Co-Al 2 O 3 /SiO 2 (35%)/ZSM-5(30%)/Al 2 O 3 (35%). The relatively low values of effective activation energies estimated for all catalysts indicate that the reaction can proceed with high conversion at moderate temperatures.
ISSN:0023-1584
1608-3210
DOI:10.1134/S002315842302009X