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Dry reforming over mesoporous nanocrystalline 5% Ni/M-MgAl2O4 (M: CeO2, ZrO2, La2O3) catalysts.
- Source :
-
International Journal of Hydrogen Energy . Jun2019, Vol. 44 Issue 31, p16516-16525. 10p. - Publication Year :
- 2019
-
Abstract
- In this article mesoporous nanocrystalline 5 wt%M-95 wt%MgAl 2 O 4 (M: CeO 2 , ZrO 2 , La 2 O 3) powders were prepared by a novel on-step sol-gel process and employed as a support for the synthesis of 5 wt%Ni catalysts for synthesis gas production via dry reforming. The magnesium aluminate spinel prepared with this sol-gel method possessed a high BET area of 264 m2 g−1 with a high pore volume of 0.436 cm3 g−1. The results indicated that the addition of promoters (CeO 2 , ZrO 2 , La 2 O 3) to magnesium aluminate improved the BET area and pore volume and also decreased the crystallite size. Among the prepared powders and catalysts, 5 wt%La 2 O 3 -95 wt%MgAl 2 O 4 and 5 wt%Ni/5 wt%CeO 2 -95 wt%MgAl 2 O 4 exhibited the highest BET area of 306 m2 g−1 and 263 m2 g−1, respectively. The catalytic results indicated that the 5 wt%Ni/5 wt%CeO 2 -95 wt%MgAl 2 O 4 catalyst exhibited the highest activity and the lowest carbon formation among the prepared catalysts with the same content of the promoter. The influence of the CeO 2 content on the textural and catalytic performance was also investigated and the results illustrated that the increment in CeO 2 content improved the methane conversion and reduced the amount of deposited carbon, which could be related to the redox properties of the catalyst support. • Dry reforming over 5% Ni/M-MgAl 2 O 4 (M: CeO 2 , ZrO 2 , La 2 O 3) catalysts was studied. • 5 wt%La 2 O 3 -95 wt%MgAl 2 O 4 powders showed the highest BET area. • The prepared catalysts exhibited mesoporous structure with high BET area. • 5%Ni/5%CeO 2 –95%MgAl 2 O 4 exhibited the highest activity and the lowest carbon formation. • The increment in CeO 2 content improved the activity and reduced the amount of deposited carbon. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 03603199
- Volume :
- 44
- Issue :
- 31
- Database :
- Academic Search Index
- Journal :
- International Journal of Hydrogen Energy
- Publication Type :
- Academic Journal
- Accession number :
- 136912048
- Full Text :
- https://doi.org/10.1016/j.ijhydene.2019.04.213