INTEQUI   20941
INSTITUTO DE INVESTIGACIONES EN TECNOLOGIA QUIMICA
Unidad Ejecutora - UE
artículos
Título:
Carbon dioxide reforming of methane over K-modified Ni-Al2O3 catalysts. Effect of the potassium content
Autor/es:
ADOLFO EDUARDO CASTRO LUNA; MARÍA ELENA IRIARTE; MARÍA MARTHA BARROSO QUIROGA
Revista:
INDIAN JOURNAL OF CHEMICAL TECHNOLOGY
Editorial:
NATL INST SCIENCE COMMUNICATION
Referencias:
Año: 2010 vol. 5 p. 72 - 78
ISSN:
0971-457X
Resumen:
The influence of the potassium content on the performance of a Ni-Al2O3 catalyst, prepared by a sol–gel method, in the CO2 reforming of methane was studied. For this purpose, catalytic activity and resistance to carbon deposition were measured. The characterization techniques used were BET surface area, X-ray diffraction, Transmission Electron Microscopy (TEM),Temperature-Programmed Reduction (TPR) and Temperature-Programmed Oxidation (TPO). The CO2 reforming of methane was carried out at 750ºC and at a CO2/CH4 ratio of 1. K-modified catalysts were prepared by incipient wetness impregnation. The effects of K addition on the physicochemical properties were studied at different potassium contents, from 0 to 1 wt.% K.Compared to the unmodified catalyst, the introduction of K showed constant but slightly less activity, a lowering in the hydrogen yield and a lower carbon deposition after the same operation period. Our results showed the highest increase in resistance to carbon accumulation at a K load of 0.5 wt.%