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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Bibliographic Details
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
Description
Summary:<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.
ISSN:0100-4042
1678-7064

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