Título: | STUDY OF SUPPORTED AND NOT SUPPORTED IRON NANO PARTICLES IN THE REACTION OF FISCHER TROPSCH | ||||||||||||
Autor: |
OLIVER EUGENIO EVERETT ESPINO |
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Colaborador(es): |
MARIA ISABEL PAIS DA SILVA - Orientador LAURINDA FATIMA DA FONSECA PEREIRA GUIMARAES BRAGANCA - Coorientador |
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Catalogação: | 20/JUL/2016 | Língua(s): | PORTUGUESE - BRAZIL |
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Tipo: | TEXT | Subtipo: | THESIS | ||||||||||
Notas: |
[pt] Todos os dados constantes dos documentos são de inteira responsabilidade de seus autores. Os dados utilizados nas descrições dos documentos estão em conformidade com os sistemas da administração da PUC-Rio. [en] All data contained in the documents are the sole responsibility of the authors. The data used in the descriptions of the documents are in conformity with the systems of the administration of PUC-Rio. |
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Referência(s): |
[pt] https://www.maxwell.vrac.puc-rio.br/projetosEspeciais/ETDs/consultas/conteudo.php?strSecao=resultado&nrSeq=26936&idi=1 [en] https://www.maxwell.vrac.puc-rio.br/projetosEspeciais/ETDs/consultas/conteudo.php?strSecao=resultado&nrSeq=26936&idi=2 |
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DOI: | https://doi.org/10.17771/PUCRio.acad.26936 | ||||||||||||
Resumo: | |||||||||||||
Iron catalysts supported on silica alumina and mesoporous material,
beside non supported iron nanoparticles, were studied. The preparation of
supported catalysts occurred by incipient wetness impregnation method
with aqueous solutions of iron chloride to give 2 percent or 5 percent of metal. One iron
catalyst supported on silica alumina was prepared by the method of urea,
in which an appropriate amount of an aqueous solution of FeCl3·6H2O
(99 percent - Merck) was mixed with urea for impregnation. The samples were
characterized by measurements of N2 physisorption, X-ray diffraction
(XRD), temperature programmed reduction with (TPR), transmission
electron microscopy (TEM). The amount of metal embedded in each
sample was determined using atomic absorption spectroscopy (AAS). The
silica alumina and mesoporous silica supports were also characterized by
thermogravimetric analysis (DTA/TGA). The textural properties showed that
after introduction of the metal into the supports, the specific area, pore
volume and pore diameter decreased as the metal content was increased.
XRD analysis with Rietveld refinement showed the formation of phases the
following phases FeO, Fe3O4, Fe0, for all supported samples. Reduction
profiles (TPR) for the supported iron samples showed mainly two reduction
regions, assigned for Fe2O3 to FeO and for FeO to Fe0, respectively.
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