Abstracts Book - IMRC 2018

• SF3-O038
DRY REFORMING OF METHANE OVER BIMETALLIC CERIA
SUPPORTED Ni-Pt CATALYSTS
Antonio Gomez 1 , Diego Daniel Gonzalez Araiza 1 , Gabriela Díaz 1 , Diana Griselda Arcos Alvaro 1
1 Universidad Nacional Autónoma de México, Instituto de Física, Mexico.
The steady increase of CO2 and CH4 cause global warming of the planet. The
concentration of these gases can be decreased by the catalytic reaction of dry
reforming of methane to produce syngas (CH4 + CO2 ® 2CO + 2H2). Due to the
endothermic nature of this reaction (DH298K = +247 kJ/mol) high temperatures
(> 700 °C) are required to reach competitive yield. Under these conditions, the
catalysts exhibit deactivation due to sintering or to the blocking of catalytic sites
by carbon deposits. In this work, a study of the effect of the metallic composition
of Ni-Pt/CeO2 catalysts on their catalytic properties is carried out, in particular
its effect on the deactivation of the catalyst is explored. The use of CeO2 as
catalytic support is due to its redox properties that influence the elimination of
the carbon that deactivates the catalyst. For this study, a series of Ni-Pt catalysts
supported in CeO2 at different atomic concentrations was prepared. They were
characterized using various analysis techniques. The catalytic activity is
determined as a function of the temperature and the reaction time, as well as
the molar ratio H2/CO. A good performance of the Ni-Pt/CeO2 catalysts is
observed. In particular, a marked resistance to the deactivation of bimetallic
catalysts Pt50Ni50 and Pt25Ni75 is observed as well as a higher H2/CO ratio
during 24 hours of reaction.
Acknowledgment:
CONACyT-176509 Project is recognized for funding. LCMIF (Samuel Tehuacanero
Cuapa, Roberto Hernández y Manuel Aguilars) for TEM images and EDS
determination and LAREC-IF (Antonio Morales) for XRD assistance.
Keywords: Dry reforming of CH4, Bimetallic catalysts, Ni-Pt/CeO2, Carbon deposition
Presenting authors email: gomez@fisica.unam.mx