Determination of the Content of Promoters in Magnetite and Wustite Phases in the Fused Iron Catalyst

• Authors: Zofia Lendzion-Bieluń , Roman Jędrzejewski
• Languages of publication: EN

Abstracts

EN

Taking advantage of differences in etching rates of crystallographic phases, forming an oxidized form of the fused iron catalyst, a content of promoters in main phases, magnetite and wustite, was determined. A calcium oxide content in magnetite and wustite was 0.54 wt% and 3.59 wt%, respectively. Aluminum oxide was found in the magnetite phase, and its content was 4.5 wt%. The third promoter, potassium oxide, was almost completely located outside these phases. XRD and ICP-OES instrumental methods were used in the investigations.

Keywords

EN

iron catalyst; promoters; ammonia synthesis; selective etching

• Publisher: De Gruyter Open
• Journal: Polish Journal of Chemical Technology
• Year: 2013
• Volume: 15
• Issue: 1
• Pages: 27-29

Dates

published

1 - 03 - 2013

online

27 - 03 - 2013

Contributors

author

Zofia Lendzion-Bieluń

• West Pomeranian University of Technology, Szczecin, Institute of Inorganic Chemical Technology and Environmental Engineering, 70-322 Szczecin, Pułaskiego 10, Poland

author

Roman Jędrzejewski

• West Pomeranian University of Technology, Szczecin, Institute of Materials Science and Engineering, 70-322 Szczecin, Pułaskiego 10, Poland

References

• 1. Lendzion-Bielun, Z., Jedrzejewski, R. & Arabczyk, W. (2011). Heterogenity of ingot of the fused iron catalyst for ammonia synthesis. Appl. Catal. A: General, 400, 48-53. DOI: 10.1016/j.apcata.2011.04.010.[Crossref]
• 2. Lendzion-Bielun, Z. & Arabczyk, W. (2001). Method for determination of the chemical composition of phases of the iron catalyst precursor for ammonia synthesis. Appl. Catal. A: General, 207, 37-41. DOI: 10.1016/S0926-860X(00)00614-1.[Crossref]
• 3. Lendzion-Bielun, Z., Arabczyk, W. & Figurski, M.,(2002). The effect of the iron oxidation degree on distribution of promotors in the fused catalyst precursors and their activity in the ammonia synthesis reaction. Appl. Catal. A: General, 227, 255-263. DOI: 10.1016/ S0926-860X(01)00938-3.[Crossref]
• 4. Pennock, G.M., Flower, H.M. & Andrew, S.P.S. (1987). The mechanism of formation of ammonia synthesis catalyst. J. Catal.,103 (1), 1-19.
• 5. Somorjai, G.A. & Materer, N. (1994). Surface structures in ammonia synthesis. Topics in Catal.,1 (3-4), 215-231. DOI: 10.1007/BF01492277.[Crossref]
• 6. Arabczyk, W., Ziebro, J., Kałucki, K., Świerkowski, R. & Jakrzewska, M. Laboratory scale plant for continuous fusing of iron catalysts, Chemik, 1 (1996), 3-7.(In Polish).

Identifiers

DOI

10.2478/pjct-2013-0006