Análise por componentes principais de espectros nexafs na especiação do molibdênio em catalisadores de hidrotratamento Principal component analysis of nexafs spectra for molybdenum speciation in hydrotreating catalysts
<abstract language="eng">Bulk and supported molybdenum based catalysts, modified by nickel, phosphorous or tungsten were studied by NEXAFS spectroscopy at the Mo L III and L II edges. The techniques of principal component analysis (PCA) together with a linear combination analysis (LC...
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| Format: | Article |
| Language: | English |
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Sociedade Brasileira de Química
2010-01-01
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| Series: | Química Nova |
| Subjects: | |
| Online Access: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40422010000600023 |
| _version_ | 1818549701658542080 |
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| author | Arnaldo da C. Faro Jr Victor de O. Rodrigues Jean-G. Eon Angela S. Rocha |
| author_facet | Arnaldo da C. Faro Jr Victor de O. Rodrigues Jean-G. Eon Angela S. Rocha |
| author_sort | Arnaldo da C. Faro Jr |
| collection | DOAJ |
| description | <abstract language="eng">Bulk and supported molybdenum based catalysts, modified by nickel, phosphorous or tungsten were studied by NEXAFS spectroscopy at the Mo L III and L II edges. The techniques of principal component analysis (PCA) together with a linear combination analysis (LCA) allowed the detection and quantification of molybdenum atoms in two different coordination states in the oxide form of the catalysts, namely tetrahedral and octahedral coordination. |
| first_indexed | 2024-12-12T08:36:47Z |
| format | Article |
| id | doaj.art-3c21a17780de47a9a2543c97f38c17d4 |
| institution | Directory Open Access Journal |
| issn | 0100-4042 1678-7064 |
| language | English |
| last_indexed | 2024-12-12T08:36:47Z |
| publishDate | 2010-01-01 |
| publisher | Sociedade Brasileira de Química |
| record_format | Article |
| series | Química Nova |
| spelling | doaj.art-3c21a17780de47a9a2543c97f38c17d42022-12-22T00:30:54ZengSociedade Brasileira de QuímicaQuímica Nova0100-40421678-70642010-01-013361342134710.1590/S0100-40422010000600023Análise por componentes principais de espectros nexafs na especiação do molibdênio em catalisadores de hidrotratamento Principal component analysis of nexafs spectra for molybdenum speciation in hydrotreating catalystsArnaldo da C. Faro JrVictor de O. RodriguesJean-G. EonAngela S. Rocha<abstract language="eng">Bulk and supported molybdenum based catalysts, modified by nickel, phosphorous or tungsten were studied by NEXAFS spectroscopy at the Mo L III and L II edges. The techniques of principal component analysis (PCA) together with a linear combination analysis (LCA) allowed the detection and quantification of molybdenum atoms in two different coordination states in the oxide form of the catalysts, namely tetrahedral and octahedral coordination.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40422010000600023XAFSprincipal component analysishydrotreatment |
| spellingShingle | Arnaldo da C. Faro Jr Victor de O. Rodrigues Jean-G. Eon Angela S. Rocha Análise por componentes principais de espectros nexafs na especiação do molibdênio em catalisadores de hidrotratamento Principal component analysis of nexafs spectra for molybdenum speciation in hydrotreating catalysts Química Nova XAFS principal component analysis hydrotreatment |
| title | Análise por componentes principais de espectros nexafs na especiação do molibdênio em catalisadores de hidrotratamento Principal component analysis of nexafs spectra for molybdenum speciation in hydrotreating catalysts |
| title_full | Análise por componentes principais de espectros nexafs na especiação do molibdênio em catalisadores de hidrotratamento Principal component analysis of nexafs spectra for molybdenum speciation in hydrotreating catalysts |
| title_fullStr | Análise por componentes principais de espectros nexafs na especiação do molibdênio em catalisadores de hidrotratamento Principal component analysis of nexafs spectra for molybdenum speciation in hydrotreating catalysts |
| title_full_unstemmed | Análise por componentes principais de espectros nexafs na especiação do molibdênio em catalisadores de hidrotratamento Principal component analysis of nexafs spectra for molybdenum speciation in hydrotreating catalysts |
| title_short | Análise por componentes principais de espectros nexafs na especiação do molibdênio em catalisadores de hidrotratamento Principal component analysis of nexafs spectra for molybdenum speciation in hydrotreating catalysts |
| title_sort | analise por componentes principais de espectros nexafs na especiacao do molibdenio em catalisadores de hidrotratamento principal component analysis of nexafs spectra for molybdenum speciation in hydrotreating catalysts |
| topic | XAFS principal component analysis hydrotreatment |
| url | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40422010000600023 |
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