1. Silica-coated LaNiO3 nanoparticles for non-thermal plasma assisted dry reforming of methane: Experimental and kinetic studies.
- Author
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Zheng, Xiaogang, Tan, Shiyu, Dong, Lichun, Li, Shaobo, and Chen, Hongmei
- Subjects
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SILICA nanoparticles , *NON-thermal plasmas , *LANTHANUM compounds , *SURFACE coatings , *METHANE , *CHEMICAL kinetics - Abstract
Silica-coated LaNiO 3 nanoparticles (LaNiO 3 @SiO 2 NPs) were prepared by the modified Stöber method for the conversion of methane with carbon dioxide into syngas in a dielectric barrier discharge reactor (DBD) under ambient conditions. The synergistic effect of LaNiO 3 @SiO 2 NPs and DBD plasma toward the dry reforming of methane was investigated as a function of flow rate of feed gases, input power, and molar ratio of CH 4 /CO 2 . The results indicated that the Ni–La 2 O 3 @SiO 2 produced from LaNiO 3 @SiO 2 NPs showed high catalytic activity for the plasma-assisted dry reforming of methane due to the creation of a silica shell. The Koros–Nowak criterion test demonstrated that the catalytic activity of Ni–La 2 O 3 @SiO 2 sample was independent of the transport phenomenon. A semi-empirical power-law rate equation was applied to investigate the kinetic behavior of Ni–La 2 O 3 @SiO 2 catalyst for the plasma-assisted dry reforming of CH 4 and evaluate its kinetic parameters, including activation energy, rate constant, and reaction orders. Compared to the activation energy estimated for CO 2 consumption, lower value of CH 4 conversion corresponded to its higher reaction rate. [ABSTRACT FROM AUTHOR]
- Published
- 2015
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