Structure of impregnated active carbons produced with almond shells : influence of impregnation methodology

• Type: Article in International Scientific Journal
• Date: 2000

Authors

Maria da Conceição M. Alvim Ferraz (Author) FEUP; J. L. Cabral Monteiro (Author) Other

Journal

Title: Fuel

Vol. 79 No. 6

Pages: 645-650

ISSN: 0016-2361

Publisher: Elsevier

Indexing

ISI Web of Science

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Other information

Abstract (EN): Activated carbons impregnated with CoO, Co3O4 and CrO3 were prepared, to be used in the oxidative destruction of atmospheric organic pollutants. To analyze the influence of impregnation methodology on the structure, the impregnation step was conducted after activation and after carbonization. When impregnation is made after activation, the impregnated salts must be deposited on the internal surface, blocking the access to part of the initial structure. When impregnation is made after carbonization, the impregnated active carbons have even more important contribution of micro and mesoporosity. The metallic impregnants catalyze the activation step, allowing a controlled development of the larger micropores and mesopores, i.e. bigger for higher metal percentages and with Co3O4 as catalyst.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 6