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      Análise por componentes principais de espectros nexafs na especiação do molibdênio em catalisadores de hidrotratamento Translated title: Principal component analysis of nexafs spectra for molybdenum speciation in hydrotreating catalysts

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          Translated abstract

          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.

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          Factor analysis in Chemistry

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                Author and article information

                Contributors
                Role: ND
                Role: ND
                Role: ND
                Role: ND
                Journal
                qn
                Química Nova
                Quím. Nova
                Sociedade Brasileira de Química (São Paulo )
                1678-7064
                2010
                : 33
                : 6
                : 1342-1347
                Affiliations
                [1 ] Universidade Federal do Rio de Janeiro Brazil
                [2 ] Universidade Federal do Rio de Janeiro Brazil
                Article
                S0100-40422010000600023
                10.1590/S0100-40422010000600023

                http://creativecommons.org/licenses/by/4.0/

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                Product Information: website
                Categories
                CHEMISTRY, MULTIDISCIPLINARY

                General chemistry

                hydrotreatment, principal component analysis, XAFS

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