MnOx-support interactions in catalytic bodies for selective reduction of NO with NH3
[EN] Catalytic bodies for selective reduction of NO with NH based on MnO, TiO and sepiolite as active phase, support, and binder, respectively, were prepared. The same amount of MnO (5 w%) was added by impregnation of the precursor over a 70/30 titania/sepiolite. One catalyst was obtained by wet equ...
| Authors: | , , , , , |
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| Format: | article |
| Status: | Versión aceptada para publicación |
| Publication Date: | 2019 |
| Country: | España |
| Institution: | Consejo Superior de Investigaciones Científicas (CSIC) |
| Repository: | DIGITAL.CSIC. Repositorio Institucional del CSIC |
| OAI Identifier: | oai:digital.csic.es:10261/218127 |
| Online Access: | http://hdl.handle.net/10261/218127 |
| Access Level: | Open access |
| Keyword: | Low temperature SCR Manganese oxides Catalytic bodies Operando XAS In situ spectroscopy |
| Summary: | [EN] Catalytic bodies for selective reduction of NO with NH based on MnO, TiO and sepiolite as active phase, support, and binder, respectively, were prepared. The same amount of MnO (5 w%) was added by impregnation of the precursor over a 70/30 titania/sepiolite. One catalyst was obtained by wet equilibrium impregnation of the pre-shaped support, while the other was prepared by incipient wetness impregnation of the TiO and then mixed with the binder and the PGA, and finally extruded. In order to study the role of the binder in the catalytic system, four models were also synthesized. According to characterization data and to catalytic activity results, sepiolite not only confers the rheological properties needed for extrusion, but it also modifies the physicochemical properties of the catalysts: it modulates the acidity and the NO adsorption capacity and lability, and, depending on the synthesis procedure, it enhances catalytic activity. |
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