Methanation of carbon dioxide over the LaNiO3 perovskite catalysts activated under the reactant stream

✍ Scribed by Jing GAO; Li-shan JIA; Wei-ping FANG; Qing-biao LI; Hao SONG

• Book ID: 104453036
• Publisher: Elsevier
• Year: 2009
• Tongue: Chinese
• Weight: 361 KB
• Volume: 37
• Category: Article
• ISSN: 1872-5813
• DOI: 10.1016/s1872-5813(10)60008-4

✦ Synopsis

In this study, LaNiO 3 perovskite catalysts were prepared by citrate method and used for carbon dioxide (CO 2 ) methanation.The catalysts were activated at different temperatures (400-700 o C) under the reactant stream. The activation led to the formation of small metallic nickel particles and hexagonal lanthanum oxocarbonate (La 2 O 2 CO 3) . Ni 0 was highly dispersed and enveloped by La 2 O 2 CO 3 , which was responsible for the high catalytic activity and stability of the LaNiO 3 perovskite catalysts even at high temperature (400-500 o C). The X-ray diffraction, X-ray photoelectron spectroscopy, transmission electron microscopy, and H 2 -temperature-programmed desorption measurements illustrated that La 2 O 2 CO 3 generated from the activation might play an important role in the methanation of CO 2 .