Mechanochemical activation of catalysts for CO2 methanation

✍ Scribed by S. Mori; W.-C. Xu; T. Ishidzuki; N. Ogasawara; J. Imai; K. Kobayashi

• Publisher: Elsevier Science
• Year: 1996
• Tongue: English
• Weight: 716 KB
• Volume: 137
• Category: Article
• ISSN: 0926-860X
• DOI: 10.1016/0926-860x(95)00319-3

✦ Synopsis

The hydrogenation of CO 2 to CH 4 was carried out using MgO-mixed catalysts of Ru, Ni, Fe or their combinations at temperatures ranging from 80 to 150°C under initial pressures of 100 Tort CO 2 and 500 Torr H 2. The effect of the mechanical milling of catalysts on the reaction was investigated. It was found that (1) the yield of CH 4 strongly depended on the kind of catalysts; the highest yield was achieved with Ru-MgO catalyst and the lowest yield with Ni-Fe catalyst. (2) Mechanochemically activated catalysts largely increased the production rate of CH 4 and considerably decreased the activation energy of the reaction from 74 kJ/mol to 41 kJ/mol for Ru-MgO catalyst.