Chromium and Copper-Doped Magnetite Catalysts for the High Temperature Shift Reaction
Copper and chromium-doped magnetite was prepared to be used as catalysts, in the active phase, in the high temperature shift (HTS) reaction. Samples were produced by heating a mixed hydrate ferric oxyhydroxide (IHA) in the range of 150-400 °C and characterized by means of chemical analysis, X-ray di...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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Sociedade Brasileira de Química
1999-01-01
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| Series: | Journal of the Brazilian Chemical Society |
| Subjects: | |
| Online Access: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50531999000100009 |
| _version_ | 1819074740606730240 |
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| author | Quadro Emerentino Brazil Dias Maria de Lourdes Ribeiro Amorim Adelaide Maria Mendonça Rangel Maria do Carmo |
| author_facet | Quadro Emerentino Brazil Dias Maria de Lourdes Ribeiro Amorim Adelaide Maria Mendonça Rangel Maria do Carmo |
| author_sort | Quadro Emerentino Brazil |
| collection | DOAJ |
| description | Copper and chromium-doped magnetite was prepared to be used as catalysts, in the active phase, in the high temperature shift (HTS) reaction. Samples were produced by heating a mixed hydrate ferric oxyhydroxide (IHA) in the range of 150-400 °C and characterized by means of chemical analysis, X-ray diffraction, thermal analysis (DSC and TG), infrared spectroscopy, surface area measurements, scanning electron microscopy and X-ray microanalysis. It was found that copper favors magnetite formation but does not affect significantly the crystallinity of the solids. Both chromium and copper improve the performance of the catalysts towards the HTS reaction: chromium acts as a stabilizer whereas copper increases the intrinsic activity. However, copper favors sinterization leading to solids with low surface areas. The increase in the catalytic activity and in the surface area of the solids reflects the synergy of these dopants. |
| first_indexed | 2024-12-21T18:14:19Z |
| format | Article |
| id | doaj.art-ca9a3245d4b349bdad6a20537a20346a |
| institution | Directory Open Access Journal |
| issn | 0103-5053 |
| language | English |
| last_indexed | 2024-12-21T18:14:19Z |
| publishDate | 1999-01-01 |
| publisher | Sociedade Brasileira de Química |
| record_format | Article |
| series | Journal of the Brazilian Chemical Society |
| spelling | doaj.art-ca9a3245d4b349bdad6a20537a20346a2022-12-21T18:54:42ZengSociedade Brasileira de QuímicaJournal of the Brazilian Chemical Society0103-50531999-01-011015159Chromium and Copper-Doped Magnetite Catalysts for the High Temperature Shift ReactionQuadro Emerentino BrazilDias Maria de Lourdes RibeiroAmorim Adelaide Maria MendonçaRangel Maria do CarmoCopper and chromium-doped magnetite was prepared to be used as catalysts, in the active phase, in the high temperature shift (HTS) reaction. Samples were produced by heating a mixed hydrate ferric oxyhydroxide (IHA) in the range of 150-400 °C and characterized by means of chemical analysis, X-ray diffraction, thermal analysis (DSC and TG), infrared spectroscopy, surface area measurements, scanning electron microscopy and X-ray microanalysis. It was found that copper favors magnetite formation but does not affect significantly the crystallinity of the solids. Both chromium and copper improve the performance of the catalysts towards the HTS reaction: chromium acts as a stabilizer whereas copper increases the intrinsic activity. However, copper favors sinterization leading to solids with low surface areas. The increase in the catalytic activity and in the surface area of the solids reflects the synergy of these dopants.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50531999000100009magnetite formationchromium and copper-doped magnetiteHTS catalyst |
| spellingShingle | Quadro Emerentino Brazil Dias Maria de Lourdes Ribeiro Amorim Adelaide Maria Mendonça Rangel Maria do Carmo Chromium and Copper-Doped Magnetite Catalysts for the High Temperature Shift Reaction Journal of the Brazilian Chemical Society magnetite formation chromium and copper-doped magnetite HTS catalyst |
| title | Chromium and Copper-Doped Magnetite Catalysts for the High Temperature Shift Reaction |
| title_full | Chromium and Copper-Doped Magnetite Catalysts for the High Temperature Shift Reaction |
| title_fullStr | Chromium and Copper-Doped Magnetite Catalysts for the High Temperature Shift Reaction |
| title_full_unstemmed | Chromium and Copper-Doped Magnetite Catalysts for the High Temperature Shift Reaction |
| title_short | Chromium and Copper-Doped Magnetite Catalysts for the High Temperature Shift Reaction |
| title_sort | chromium and copper doped magnetite catalysts for the high temperature shift reaction |
| topic | magnetite formation chromium and copper-doped magnetite HTS catalyst |
| url | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50531999000100009 |
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