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Determination of Vanadium Valence State in CaO-MgO-Al2O3-SiO2 System By High-Temperature Mass Spectrometry
KTH, School of Industrial Engineering and Management (ITM), Materials Science and Engineering, Materials Process Science.
KTH, School of Industrial Engineering and Management (ITM), Materials Science and Engineering, Materials Process Science.
2013 (English)In: Metallurgical and materials transactions. B, process metallurgy and materials processing science, ISSN 1073-5615, E-ISSN 1543-1916, Vol. 44, no 4, 948-953 p.Article in journal (Refereed) Published
Abstract [en]

In the present study, the applicability of the high-temperature mass spectrometric method combined with Knudsen effusion cell for quantifying the valence states of V in the multicomponent system CaO-MgO-Al2O3-SiO2-VO (x) up to a maximum temperature of 2050 K (1777 A degrees C) was examined. The valence ratio of V3+/V4+ in slag phase was derived from the partial pressures of VO and VO2 in the effused vapor phase. The results show good agreement with the literature values obtained by other techniques. A correlation between the valence ratio V3+/V4+ and the oxygen partial pressure as well as basicity was achieved based on the present results and accessed data in the literature. The results of the present study demonstrate that the Knudsen cell-mass spectrometric method can be a very effective tool in estimating the valence ratios for of transition metals in metallurgical slags.

Place, publisher, year, edition, pages
2013. Vol. 44, no 4, 948-953 p.
Keyword [en]
Effective tool, High temperature, Knudsen effusion cells, Maximum temperature, Metallurgical slags, Multi-component systems, Oxygen partial pressure, Spectrometric methods
National Category
Metallurgy and Metallic Materials
Identifiers
URN: urn:nbn:se:kth:diva-125843DOI: 10.1007/s11663-013-9836-6ISI: 000321669900020Scopus ID: 2-s2.0-84880323027OAI: oai:DiVA.org:kth-125843DiVA: diva2:641075
Funder
Mistra - The Swedish Foundation for Strategic Environmental Research
Note

QC 20130815

Available from: 2013-08-15 Created: 2013-08-15 Last updated: 2017-12-06Bibliographically approved

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