Physics
Scientific paper
Mar 1998
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998m%26ps...33..243l&link_type=abstract
Meteoritics & Planetary Science, vol. 33, no. 2, pages 243-251.
Physics
16
Scientific paper
The reaction between kamacite grains and H2+CO gas mixture has been tested in the laboratory under experimental conditions presumed for IDP formation in a nebular- type environment (H2:CO=250:1; 5x10-4 atm total pressure, and 473 K). Carbon deposition, hydrocarbon production in the C1-C4 range, and the formation of an e-carbide phase occur when well-defined model FeNi bcc alloy (kamacite) particles are exposed to a mixture of H2+CO during 103 hours. 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.
Casanova Ignasi
Llorca Jordi
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