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Título

CH4 and CO2 partial pressures influence and deactivation study on the Catalytic Decomposition of Biogas over a Ni catalyst

Autor de Llobet, Saúl; Pinilla Ibarz, José Luis; Lázaro Elorri, María Jesús; Moliner Álvarez, Rafael; Suelves Laiglesia, Isabel
Palabras clave Catalytic decomposition of biogas
CH4-CO2 reaction
Ni/Al2O3 catalyst
Nanostructured carbon
Fecha de publicación 2013
EditorElsevier
Citación Fuel 111: 778- 783 (2013)
ResumenA conceptually similar approach to dry reforming of CH4 (DRM) called Catalytic Decomposition of Biogas (CDB) is proposed. CDB is based on the direct decomposition of CH4 and CO2, which are the most abundant components in biogas (typically with CH4:CO2 molar ratios higher than 1). The main difference between DRM and CDB lies in the desired products obtained in each process. While in DRM carbon formation is not desired and thus avoided, in CDB carbon accumulation in form of filamentous structures is promoted. In this work, the effect of CH4 and CO 2 partial pressures on the initial reaction rates of CDB was studied using a Ni/Al2O3 catalyst. Furthermore, a deactivation study was carried out in order to determine the experimental conditions (CH 4 and CO2 partial pressures and temperature) at which carbon formation did not deactivate the catalyst. It was proved that after a certain time on stream, CDB can reach the steady state even though the CH 4:CO2 molar ratio is higher than one (typical biogas conditions). In addition, temperature increased reaction rates since CDB is an endothermic process, but it had no effect on catalyst deactivation. © 2013 Elsevier Ltd. All rights reserved.
Descripción 5 págs, 6 figures, 2 tbles.--Available online 17 May 2013
Versión del editorhttp://dx.doi.org/10.1016/j.fuel.2013.05.001
URI http://hdl.handle.net/10261/95035
DOI10.1016/j.fuel.2013.05.001
Identificadoresdoi: 10.1016/j.fuel.2013.05.001
issn: 0016-2361
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