INCAPE   05401
INSTITUTO DE INVESTIGACIONES EN CATALISIS Y PETROQUIMICA "ING. JOSE MIGUEL PARERA"
Unidad Ejecutora - UE
congresos y reuniones científicas
Título:
Co/ZrO2, Co/CeO2 and MnCoCe structured catalysts for COPROX
Autor/es:
LETICIA E. GÓMEZ; ALICIA V. BOIX; MARIA ALICIA ULLA; EDUARDO E. MIRÓ
Lugar:
Beijing
Reunión:
Congreso; 4th International Conference on Structured Catalysts and Reactors; 2013
Institución organizadora:
State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology
Resumen:
One way to produce hydrogen to be used in PEM cells is by means of steam reforming or autothermal reforming of hydrocarbons. Generally, this step is followed by the Water Gas Shift reaction, where the hydrogen stream is purified. However, the effluent of the WGS reaction contains around 1%CO and it could poison the cell anode. The CO preferential oxidation is an adequate method to reduce the CO concentration to less than 10 ppm. In this work, three kinds of structured catalysts were prepared over cordierite monoliths to be used in the COPROX reaction: Co/ZrO2, Co/CeO2 and MnCoCeOx. Moreover, the catalysts were characterized by Laser Raman spectroscopy, XPS, XRD and SEM. Co/ZrO2 and Co/CeO2 were prepared in a similar way. First, a support layer was deposited by successive immersing cycles of a cordierite substrate in a suspension of commercial powder ZrO2 in acetic acid or CeO2 in deionized water. The cobalt was incorporated immersing covered monoliths in a Co(NO3)2 solution. The MnCoCe monolith was prepared by washcoating of the MnCoCe catalyst which had been previously synthesized by co-precipitation of Mn, Co and Ce nitrates in order to get 10 wt% Co and an molar ratio Mn/Co=1/4. This powder was used to form an aqueous suspension, and then the bare cordierite pieces were immersed in this suspension successively in order to get an adequate catalytic layer thickness.