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TitleSeasoning hydrous pyrolysis reactor vessels
AuthorSnowdon, L R; Jiang, C; Nightingale, M; Snowdon, R W
SourceOrganic Geochemistry vol. 110, 2017 p. 57-59,
Alt SeriesEarth Sciences Sector, Contribution Series 20160360
Mediapaper; on-line; digital
File formatpdf
SubjectsProcesses; pyrolysis; stainless steel reactor; metallurgy; hydrous pyrolysis; hydrogen generation; seasoning
Illustrationsimages; graphs
ProgramCanadian Energy Geoscience Innovation Cluster (CEGIC), Geoscience for New Energy Supply (GNES)
AbstractFresh stainless steel (316) surfaces were blackened by heating at 250 °C for 2-20 hours in the presence of water and argon. Headspace gas after heating contained up to 1 mol% molecular hydrogen. These results indicate that the water oxidized the metal surfaces causing the blackening and released molecular hydrogen. Oxidation must be considered as an alternative or complementary process to carburization during the seasoning of 316 stainless steel reactor vessels during hydrous pyrolysis.
Summary(Plain Language Summary, not published)
Pyrolysis experiments have been carried out on a brand new 250 ml size stainless steel cylindrical reactor at 250C in the presence of distilled water and argon only. It was found that the shiny stainless steel surface was blackened after the experiment for only 2 to 20 hours, likely due to oxidation. Hydrogen was also found to be present in the headspace at a concentration up to 1% mole. This suggests an occurrence of water split during the experiment. This finding has significant implications for not only the understanding of hydrous pyrolysis of source rocks widely used in the petroleum geochemical labs, but also for the industries involved in high temperature and high pressure steam generating.