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https://repositorio.ufba.br/handle/ri/4842
metadata.dc.type: | Artigo de Periódico |
Title: | Ação promotora do zinco em catalisadores de síntese do estireno |
Other Titles: | Química Nova |
Authors: | Leite, Hugo Ernane Bonfim Oliveira, Alcineia Conceição Varela, Maria do Carmo Rangel Santos |
metadata.dc.creator: | Leite, Hugo Ernane Bonfim Oliveira, Alcineia Conceição Varela, Maria do Carmo Rangel Santos |
Abstract: | Ethylbenzene dehydrogenation in the presence of steam is the main commercial route to produce styrene. The industrial catalyst is chromium and potassium-doped hematite, which easily deactivates with time due to potassium loss. In order to find non-toxic and potassium free catalysts, the promoter action of zinc on hematite was studied in this work. It was found that zinc acts as structural promoter by stabilizing the Fe3+ species (active phase) as maghemite. Although it decreases the specific surface area, it increases four times the catalytic activity as compared to hematite. |
Keywords: | Hematite Styrene Ethylbenzene dehydrogenation |
URI: | http://www.repositorio.ufba.br/ri/handle/ri/4842 |
Issue Date: | 2004 |
Appears in Collections: | Artigo Publicado em Periódico (Química) |
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