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Dry reforming of methane over Ni/La2O3 nanorod catalysts with stabilized Ni nanoparticles.
- Source :
-
Applied Catalysis B: Environmental . Mar2017, Vol. 202, p683-694. 12p. - Publication Year :
- 2017
-
Abstract
- This paper describes the design of a Ni/La 2 O 3 catalyst using La 2 O 2 CO 3 nanorod as a support precursor (denoted as Ni/La 2 O 3 -LOC) via a wet impregnation method for dry reforming of methane (DRM). The results showed that La 2 O 3 derived from the La 2 O 2 CO 3 precursor maintained its initial morphology upon thermal treatment and could highly disperse Ni particles on it. Additionally, the nanorod-shaped support could provide more medium-strength basic sites to facilitate CO 2 adsorption and activation on its surface. Consequently, the Ni/La 2 O 3 -LOC catalyst reached 70% of CH 4 conversion and 75% of CO 2 conversion at 700 °C after 50 h DRM reaction with a H 2 /CO ratio of 0.87. The enhanced metal-support interaction restricted the sintering of nickel particles under harsh reaction conditions. Coke evolution on the catalysts was also investigated to understand coke formation mechanism and the role of La 2 O 2 CO 3 in coke elimination. It has been found that nickel dispersion can affect distribution of coke and La 2 O 2 CO 3 on the surface of catalyst, both of which have a close relation with catalytic performance. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 09263373
- Volume :
- 202
- Database :
- Academic Search Index
- Journal :
- Applied Catalysis B: Environmental
- Publication Type :
- Academic Journal
- Accession number :
- 119218953
- Full Text :
- https://doi.org/10.1016/j.apcatb.2016.09.071