Influence of low CO concentration on catalysed carbon deposition on 20Cr25Ni steel in CO⁠2 environments containing ethene

Rengen Ding, Mary Taylor, Hugh Evans, Clive Mowforth, Neal Smith, Yu-Lung Chiu, Brian Connolly

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Abstract

Carbon deposition on 20Cr25Ni steel at 700 °C has been investigated in CO2-based gases containing 0.7 vol%, 1.0 vol% and 1.4 vol% CO, each with ∼1000vpm C2H4, at 700 °C. Filamentary carbon deposits were formed at the two lowest CO contents but not at 1.4 vol% CO. TEM analyses have shown that the different CO levels change the propensity for deposition by altering the ratio of Ni:Fe in the nanometre sized catalytic particles produced during oxidation.
Original languageEnglish
Pages (from-to)56-64
Number of pages9
JournalCorrosion Science
Volume143
Early online date15 Aug 2018
DOIs
Publication statusPublished - 25 Sep 2018

Keywords

  • CO
  • CO2
  • Carbon deposition
  • Austenitic stainless steel

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