Reaction between H2, CO, and H2S over Fe,Ni metal in the solar nebula: Experimental evidence for the formation of sulfur-bearing organic molecules and sulfides

Details Reaction between H2, CO, and H2S over Fe,Ni metal in the solar nebula: Experimental evidence for the formation of sulfur-bearing organic molecules and sulfides Reaction between H2, CO, and H2S over Fe,Ni metal in the solar nebula: Experimental evidence for the formation of sulfur-bearing organic molecules and sulfides

Jul 2000

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000m%26ps...35..841l&link_type=abstract

Meteoritics & Planetary Science, vol. 35, no. 4, pp. 841-848 (2000).

Physics

16

Scientific paper

Detailed laboratory studies have been carried out in order to simulate the interaction between nanometer-sized kamacite metal particles and different gas mixtures consisting of H2:H2S (250:0.1), H2:CO (250:1) and H2:CO:H2S (250:1:0.1) under nebular-type conditions (5x10-4 atm and 473 K). Reaction of H2+H2S with kamacite particles for 1000 h leads to the formation of pyrrhotite. Incorporation of CO into the gaseous reactant mixture results in the formation of both sulfide and carbide phases. At the same time, amorphous carbon is deposited onto the metal particles and organic molecules are evolved, namely hydrocarbons and thiols in the C1-C5 and C1-C2 range, respectively. Carbon deposition and production of organics are enhanced with respect to experiments performed with H2+CO, where a carbide phase is formed. There is no evidence for the existence of sulfur poisoning effects on the metal-catalysed hydrogenation of CO through Fischer-Tropsch-type reactions in nebular environments. In fact, it is experimentally demonstrated that sulfur-containing organic species could be synthesized by such reactions from nebular gas.

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