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Formation of carbides and hydrocarbons in chondritic interplanetary dust particles: A laboratory study
Author(s) -
LLORCA JORDI,
CASANOVA IGNASI
Publication year - 1998
Publication title -
meteoritics and planetary science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.09
H-Index - 100
eISSN - 1945-5100
pISSN - 1086-9379
DOI - 10.1111/j.1945-5100.1998.tb01629.x
Subject(s) - kamacite , interplanetary dust cloud , chondrite , carbide , formation and evolution of the solar system , carbon fibers , hydrocarbon , particle (ecology) , silicon carbide , materials science , astrobiology , analytical chemistry (journal) , chemistry , solar system , meteorite , metallurgy , geology , physics , composite material , environmental chemistry , composite number , organic chemistry , oceanography
— The reaction between kamacite grains and H 2 + CO gas mixture has been tested in the laboratory under experimental conditions presumed for interplanetary dust particle (IDP) formation in a nebular‐type environment (H 2 :CO = 250:1; 5 × 10 −4 atm total pressure, and 473 K). Carbon deposition, hydrocarbon production in the C 1 –C 4 range, and the formation of an ɛ‐carbide phase occur when well‐defined model FeNi bcc alloy (kamacite) particles are exposed to a mixture of H 2 + CO during 10 3 h. These results strongly support the idea that gas‐solid reactions in the solar nebula during CO hydrogenation represent a plausible scenario for the formation of carbides and carbonaceous materials in IDPs, as well as for the production of hydrocarbons through Fischer‐Tropsch‐type reactions.