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

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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Main Authors: Arnaldo da C. Faro Jr, Victor de O. Rodrigues, Jean-G. Eon, Angela S. Rocha
Format: Article
Language:English
Published: Sociedade Brasileira de Química 2010-01-01
Series:Química Nova
Subjects:
XAFS
principal component analysis
hydrotreatment
Online Access:http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40422010000600023
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spelling doaj-3c21a17780de47a9a2543c97f38c17d42020-11-24T22:43:17ZengSociedade 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
collection DOAJ
language English
format Article
sources DOAJ
author Arnaldo da C. Faro Jr
Victor de O. Rodrigues
Jean-G. Eon
Angela S. Rocha
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
author_facet Arnaldo da C. Faro Jr
Victor de O. Rodrigues
Jean-G. Eon
Angela S. Rocha
author_sort Arnaldo da C. Faro Jr
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_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_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_sort 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
publisher Sociedade Brasileira de Química
series Química Nova
issn 0100-4042
1678-7064
publishDate 2010-01-01
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.
topic XAFS
principal component analysis
hydrotreatment
url http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40422010000600023
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