De Lucas-Consuegra A. , Caravaca A. , Martínez P.J. , ENDRINO ARMENTEROS, JOSÉ LUIS, Dorado F. , Valverde J.L.
Si
J. Catal.
Article
Científica
5.415
3.38
01/01/2010
000282116100015
2-s2.0-77956360366
A new electrochemical catalyst (Pt-Pt/YSZ/Na-ßAl2O 3) has been prepared and characterized for the H2 production at low temperature from CH4 with a high CO2 selectivity. It has been tested under electrochemical promotion conditions under different reaction systems: steam reforming, partial oxidation and autothermal steam reforming. Among them, the latter system seems to be the most suitable one for the operation of the electrochemical catalyst in a cyclical way between positive and negative polarizations. Under positive polarization, the electrochemical catalyst produced a high amount of H2. However, it was deactivated due to a strong increase in the CH4-derived chemisorption species, which led to carbon deposition. Nevertheless, the subsequent application of negative polarization led to a strong increase in the coverage of O2- and H2O-derived species that caused the removal of the deposited carbon and, hence, the regeneration of the catalyst. The possibility of in situ electrochemical regeneration of a catalyst under fixed conditions could have a significant importance from both theoretical and technological points of view. © 2010 Elsevier Inc. All rights reserved.
Electrochemical promotion; Electrochemical regeneration; H2 production; Methane steam reforming; NEMCA effects; Partial oxidations; Steam reforming; Chemisorption; Low temperature production; Methane; Oxidation; Platinum; Polarization; Steam; Steam engineering; Catalyst regeneration