The influence of the support modification over Ni-based catalysts for dry reforming of methane reaction

Autor:	Agnieszka Pietraszek, Alain Kiennemann, Bachar Koubaissy, Anne-Cécile Roger
Rok vydání:	2011
Předmět:	Carbon dioxide reforming Chemistry Non-blocking I/O Inorganic chemistry chemistry.chemical_element General Chemistry Fluorite Catalysis Methane symbols.namesake chemistry.chemical_compound Nickel symbols High activity Raman spectroscopy Nuclear chemistry
Zdroj:	Catalysis Today. 176:267-271
ISSN:	0920-5861
DOI:	10.1016/j.cattod.2010.12.015
Popis:	5 wt.%Ni/CeZr0.5 wt.%Me (Rh,Ru) catalysts were synthesized by mixed sol–gel and impregnation method. Their catalytic activity was examined in dry reforming of methane reaction (DR) and compared with CeZrMe (Rh,Ru) parent catalysts prepared by sol–gel method. The as prepared fresh catalysts were characterized by XRD while the aged catalysts by XRD, TPO, TEM and Raman. It was found that the Rh and Ru were well incorporated into CeZr fluorite structure. Nickel was present in NiO form. Ni/CeZrRh catalyst demonstrated the highest activity reaching at 800 °C CH4 conversion near thermodynamic one. Ageing of the catalysts shows that the introduction of Rh into CeZr structure results in high activity and good stability even without Ni addition. However for CeZrRu catalyst deactivation is observed. The subsequent impregnation of Ni over CeZrRu catalyst leads to the considerable increase in its stability.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::bc4000d15800943d24341aa18620fbf1 https://doi.org/10.1016/j.cattod.2010.12.015 Zobrazit plný text záznamu Full Text from ScienceDirect