1. Ni-loaded nanocrystalline ceria-zirconia solid solutions prepared via modified Pechini route as stable to coking catalysts of CH4 dry reforming
- Author
-
Sadykov Vladislav A., Simonov Mikhail N., Mezentseva Natalia V., Pavlova Svetlana N., Fedorova Yulia E., Bobin Aleksei S., Bespalko Yulia N., Ishchenko Arcady V., Krieger Tamara A., Glazneva Tatiana S., Larina Tatyana V., Cherepanova Svetlana V., Kaichev Vasilii V., Saraev Andrey A., Chesalov Yurii A., Shmakov Aleksandr N., Roger Anne-Cecile, and Adamski Andrzej
- Subjects
methane dry reforming ,ce-zr-o oxide ,ni stabilization ,coking stability ,Chemistry ,QD1-999 - Abstract
Mixed nanocrystalline Ce-Zr-O oxides (Ce/Zr = 1 or 7/3) were prepared by modified Pechini route using ethylene glycol solutions of metal salts. Detailed characterization of their real structure and surface properties by X-ray diffraction on synchrotron radiation with the full-profile Rietveld analysis, high resolution electron microscopy with elemental analysis, Raman spectroscopy, UV-Vis and X-ray photoelectron spectroscopy revealed a high homogeneity of cations distribution in nanodomains resulting in stabilization of disordered cubic phase. This provides a high dispersion of NiO loaded on these mixed oxides by wet impregnation, a high reactivity and mobility of oxygen in these catalysts and strong interaction of Ni with support in the reduced state. This helps to achieve a high activity and coking stability of developed catalysts in CH4 dry reforming in feeds with CH4 concentration up to 15% and CH4/CO2 ratio =1.
- Published
- 2016
- Full Text
- View/download PDF