<abstract xmlns="http://www.w3.org/1999/xhtml">

Activated carbon was oxidised with concentrated nitric acid and impregnated with urea to form nitrogen-containing groups. Such a support was impregnated with cobalt, copper or silver nitrates to obtain catalysts for the selective catalytic reduction of nitrogen oxides with ammonia. Infrared spectra confirmed the formation of carboxylic and other organic oxygen-containing groups during oxidation. Nitrogen-containing species resulted from urea thermal decomposition. The metal-containing samples were hydrophilic. Cobalt and copper were present in the samples as small Co3O4 and CuO crystallites, while silver occurred in the form of large metallic crystallites, as seen from the X-ray diffraction patterns. Low temperature N2 sorption revealed that all samples were microporous solids, and the chemical and thermal treatment did not change their textural properties. The copper admixture caused the highest NO conversion, but worsened the selectivity and thermal stability of functionalised carbon support.
</abstract>

Activated carbon was oxidised with concentrated nitric acid and impregnated with urea to form nitrogen-containing groups. Such a support was impregnated with cobalt, copper or silver nitrates to obtain catalysts for the selective catalytic reduction of nitrogen oxides with ammonia. Infrared spectra confirmed the formation of carboxylic and other organic oxygen-containing groups during oxidation. Nitrogen-containing species resulted from urea thermal decomposition. The metal-containing samples were hydrophilic. Cobalt and copper were present in the samples as small Co3O4 and CuO crystallites, while silver occurred in the form of large metallic crystallites, as seen from the X-ray diffraction patterns. Low temperature N2 sorption revealed that all samples were microporous solids, and the chemical and thermal treatment did not change their textural properties. The copper admixture caused the highest NO conversion, but worsened the selectivity and thermal stability of functionalised carbon support.

Activated Carbon as a Support of Catalysts for the Removal of Nitrogen Oxides

Mineralogia

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

{"article-title":"Activated Carbon as a Support of Catalysts for the Removal of Nitrogen Oxides"}

Activated carbon was oxidised with concentrated nitric acid and impregnated with urea to form nitrogen-containing groups. Such a support was impregnated with...

Activated Carbon as a Support of Catalysts for the Removal of Nitrogen Oxides

Publié en ligne: 15 oct. 2020

Pages: 9 - 16

Reçu: 01 oct. 2019

Accepté: 06 juil. 2020

DOI: https://doi.org/10.2478/mipo-2020-0002

Mots clés
activated carbon, functionalisation, catalyst, metal oxides, nitrogen oxides

© 2020 Anna Białas et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Activated Carbon as a Support of Catalysts for the Removal of Nitrogen Oxides

Publié en ligne: 15 oct. 2020

Pages: 9 - 16

Reçu: 01 oct. 2019

Accepté: 06 juil. 2020

DOI: https://doi.org/10.2478/mipo-2020-0002

Mots clésactivated carbon, functionalisation, catalyst, metal oxides, nitrogen oxides

© 2020 Anna Białas et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Mots clés
activated carbon, functionalisation, catalyst, metal oxides, nitrogen oxides