Disproportionation of CO on iron-cobalt alloys—II: Kinetic study on iron-cobalt alloys of different compositions

✍ Scribed by M. Audier; M. Coulon; L. Bonnetain

• Publisher: Elsevier Science
• Year: 1983
• Tongue: English
• Weight: 530 KB
• Volume: 21
• Category: Article
• ISSN: 0008-6223
• DOI: 10.1016/0008-6223(83)90163-x

✦ Synopsis

A&tract--The catalytic activities in CO dispropo~ionation of iron-cobalt alloys of various composition have been compared to the activities of the pure metals at 600°C using a CO/CO* gas mixture (75% CO). The catalytic activities of the alloys are all greater than those of the pure metals. The synergetic effect is maximum for cobalt content between 37.5 and 50wt %. These findings are consistent with a prebious thermodynamic study which predicts that such compositions are the least liable to be poisoned by side reactions of carburization and oxidization. Furthermore X-ray diffraction studies show that contrary to pure metals the structures of the alloys are not modified by carbon deposition. The fiIamentous carbon deposit induces an impo~ant f~entation of the metal catalyst ori~nally under the form of coarse filings. The smallest particle sizes are obtained from the most active alloy composition.