The effects of hydrogen and helium upon carbon deposition onto metal surfaces

✍ Scribed by Y. Tamai; Y. Nishiyama; M. Takahashi

• Publisher: Elsevier Science
• Year: 1969
• Tongue: English
• Weight: 314 KB
• Volume: 7
• Category: Article
• ISSN: 0008-6223
• DOI: 10.1016/0008-6223(69)90103-1

✦ Synopsis

The initial rates of carbon deposition onto iron and nickel surfaces from nlixtures of hydrocarbon-hydrogen and -helium were measured and the effects of the composition were studied. Hydrogen accelerated the deposition onto iron, when the parl.ial pressure of hydrocarbon was such that the rate of the deposition from undiluted hydrocarbon was dependent on the pressure. Helium retarded the deposition from ethylene onto iron. Neither hydrogen nor helium affected the rates of deposition onto nickel. Ilydrogen was believed to act on the gas phase reactions.