A study of carbon-oxygen surface complexes using O18 as a tracer

✍ Scribed by F.J. Vastola; P.J. Hart; P.L. Walker Jr.

• Publisher: Elsevier Science
• Year: 1964
• Tongue: English
• Weight: 625 KB
• Volume: 2
• Category: Article
• ISSN: 0008-6223
• DOI: 10.1016/0008-6223(64)90029-6

✦ Synopsis

Upon the reaction of carbon with O,, three products form: CO, CO,, and a carbonoxygen surface complex. The CO and CO, are produced through two paths: (1) via a fleeting oxygen surface intermediate and (2) via the breakdown of an oxygen surface complex. Oz1"-16 and 0,18-1" were used in this study to ascertain the extent to which the breakdown of the surface complex contributes to the formation of CO and CO, during the combustion of Graphon at temperatures between 505 and 555°C. The rate of complex breakdown to CO and CO, is a function of the total rate of carbon gasification, the fraction of active surface area covered with complex, and the reaction temperature through a participation factor. The fraction of the total CO and CO, produced which is contributed by complex breakdown decreases with increasing combustion temperature.

In a complementary study, again using 0,16-16 and 0218-18, it was shown that the ease of oxygen complex desorption from the surface of Graphon is independent of its time of information.