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Unraveling the effects of Ce/Zr molar ratio in mesoporous CexZr1−xO2 on the performance of dry reforming of methane over the supported Ni catalysts.
- Source :
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Chemical Engineering Research & Design: Transactions of the Institution of Chemical Engineers Part A . May2023, Vol. 193, p626-640. 15p. - Publication Year :
- 2023
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Abstract
- Ni supported on the ordered mesoporous Ce x Zr 1−x O 2 with various Ce/Zr molar ratios prepared by a programmed evaporation-induced self-assembly method were employed for dry reforming of methane. The systematical techniques, including X-ray diffraction, N 2 physisorption, Raman, transmission electron microscope, chemisorption, X-ray photoelectron spectroscopy, diffuse reflection Fourier transform infrared spectrum, thermogravimetric analysis, etc. were used to clarify the structure-activity relationship. It was found that the prepared catalysts all had highly ordered mesoporous structures, and compared to the sole ZrO 2 and CeO 2 , the CeO 2 -ZrO 2 composites exhibited the best thermal stability, stronger basicity, and greater oxygen migration. Especially, the composite with Ce/Zr ratio of 1/4 possessed the suitable basicity and most oxygen vacancies, which were closely related to the excellent anti-carbon ability. Moreover, its supported catalyst had the strongest metal-support interaction and highest Ni dispersion. Expectedly, the catalyst showed the superior activity and the robust stability for at least 1800 min [Display omitted] • Ce x Zr 1−x O 2 were prepared by programmed evaporation-induced self-assembly method. • Composites had higher thermal stability, stronger basicity, greater oxygen migration. • C1Z4 possessed suitable basicity, most oxygen vacancies, highest anti-carbon ability. • NC1Z4 showed the superior activity and the long-term stability. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 02638762
- Volume :
- 193
- Database :
- Academic Search Index
- Journal :
- Chemical Engineering Research & Design: Transactions of the Institution of Chemical Engineers Part A
- Publication Type :
- Academic Journal
- Accession number :
- 163514071
- Full Text :
- https://doi.org/10.1016/j.cherd.2023.04.020