Please use this identifier to cite or link to this item:
https://repositorio.ufba.br/handle/ri/12387
metadata.dc.type: | Artigo de Periódico |
Title: | Chromium and Copper-Doped Magnetite Catalysts for the High Temperature Shift Reaction |
Other Titles: | Journal of the Brazilian Chemical Society |
Authors: | Quadro, Emerentino Brazil Dias, Maria de Lourdes Ribeiro Amorim, Adelaide Maria Mendonça Varela, Maria do Carmo Rangel Santos |
metadata.dc.creator: | Quadro, Emerentino Brazil Dias, Maria de Lourdes Ribeiro Amorim, Adelaide Maria Mendonça Varela, Maria do Carmo Rangel Santos |
Abstract: | 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. |
Publisher: | Journal of the Brazilian Chemical Society |
URI: | http://www.repositorio.ufba.br/ri/handle/ri/12387 |
Issue Date: | 1999 |
Appears in Collections: | Artigo Publicado em Periódico (Química) |
Files in This Item:
File | Description | Size | Format | |
---|---|---|---|---|
555555555555555.pdf | 1,33 MB | Adobe PDF | View/Open |
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.