Journal
CATALYSIS TODAY
Volume 138, Issue 1-2, Pages 28-32Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.cattod.2008.04.038
Keywords
dry reforming; carbon deposition; spinel; NiCeO2ZrO2/MgAl2O4
Funding
- Science and Technology in Flanders (IWT-Vlaanderen)
- IAP
- GOA
- CECAT
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Dry reforming of methane was studied over Ni catalysts supported on gamma Al2O3, Ceo(2), ZrO2 and MgAl2O4 (670 degrees C, 1.5 bar, 16-20 I CH4 ml(catalyst)(-1) h(-1)). It is shown that MgAl2O4 supported Ni catalysts promoted with both CeO2 and ZrO2 are promising catalysts for dry reforming of methane with carbon dioxide. Within a certain composition range, the simultaneous promotion with CeO2 and ZrO2 has great influence on the amount of coke and the catalyst service time. XRD analyses indicate that formation of crystalline CexZr1-xO2 mixed oxide phases occurs on double promotion. In particular, incorporation of low amounts of Zr in the CeO2 fluorite structure provides stable dry reforming catalysis. As shown with TPR, promotion leads to a higher reduced state of Ni. SEM, XRD and TPR analyses demonstrate that highly dispersed, doubly promoted Ni catalysts with a strong metal-support interaction are essential for stable dry reforming and suppression of the formation of carbon filaments. (C) 2008 Elsevier B.V. All rights reserved.
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