Shock compression of liquid carbon monoxide and methane to 90 GPa (900 kbar)

Journal Article · Tue Sep 15 04:00:00 EDT 1981 · J. Chem. Phys.; (United States)

DOI:https://doi.org/10.1063/1.442401· OSTI ID:6201501

Nellis, W J; Ree, F H; van Thiel, M; Mitchell, A C

Dynamic equation-of-state data for liquid CO and CH/sub 4/ were measured in the shock pressure range 5--92 GPa (50--920 kbar) using a two-stage light-gas gun. The liquids were shocked from initial states near their saturation curves at 77 and 111 K for CO and CH/sub 4/, respectively. The experimental technique used to double-shock CH/sub 4/ is described. The CO data were examined by using three theoretical models: (1) a chemically nonreactive model, (2) a quasi-chemical-equilibrium model that allows CO to dissociate into gaseous species and graphite, and (3) a chemical-equilibrium model that also includes a dense carbon phase which exists at higher pressures and temperatures than graphite. This dense phase is assumed to be diamond. Our analysis shows that at low pressure chemical equilibrium takes much longer than a typical shock passage time. As a consequence, the experimental data initially follow the nonreactive Hugoniot to pressures well beyond the chemical dissociation limit. Both the experimental data and the Hugoniot computed with case (3) agree satisfactorily at high pressure. Further consequences of these observations to high-explosive studies are discussed. The theoretical analysis for the CH/sub 4/ data was presented in an earlier paper.

• Research Organization: University of California, Lawrence Livermore National Laboratory, Livermore, California 94550
• OSTI ID: 6201501
• Journal Information: J. Chem. Phys.; (United States), Journal Name: J. Chem. Phys.; (United States) Vol. 75:6; ISSN JCPSA
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360603* -- Materials-- Properties
ALKANES
CARBON COMPOUNDS
CARBON MONOXIDE
CARBON OXIDES
CHALCOGENIDES
COMPRESSIBILITY
EQUATIONS
EQUATIONS OF STATE
FLUIDS
HYDROCARBONS
LIQUIDS
LOW TEMPERATURE
MECHANICAL PROPERTIES
METHANE
ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
SHOCK WAVES
VERY HIGH PRESSURE