Physics
Scientific paper
Aug 1985
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985geokh...8.1206m&link_type=abstract
Geokhimiia (ISSN 0016-7525), no. 8, Aug. 1985, p. 1206-1217. In Russian.
Physics
1
Carbon Monoxide, Chemical Evolution, Nitrogen, Planetary Nebulae, Reaction Kinetics, Reduction (Chemistry), Carbon, Iron, Phosphorus, Radial Distribution, Sulfur, Thermodynamic Properties
Scientific paper
The physical and chemical changes in the evolution of the protoplanetary nebula are discussed. The equations necessary to determine the distribution of the thermodynamic parameters of temperature, pressure, and density along the radius of the nebula are explained. With these formulas the T(R) and P(R) for various states of the nebula evolution can be calculated; graphs of these distributions are provided. The reduction kinetics of CO and N2 with an iron catalyst are described. The two models used to determine the equilibrium gas distribution in the H-O-C-N-S-P system are discussed. These data combined with CO and N2 reduction data are used to calculate the forms of carbon and nitrogen occurrence in the gaseous phase of the protoplanetary nebula. The data reveal that the main forms of carbon and nitrogen occurrence in the nebula were CO and N2.
Dorofeeva V. A.
Khodakovskii I. L.
Lavrukhina A. K.
Makalkin A. B.
Mendybaev Ruslan A.
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