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Chinese Journal of High Pressure Physics  > 2003  >  17(2): 101-105 .
ZHAO Xian-Feng, HONG Shi-Ming, LIU Fu-Sheng. Effect of Pressure on Carbon Concentration in C-H-O Supercritical-Fluid[J]. Chinese Journal of High Pressure Physics, 2003, 17(2): 101-105 . doi: 10.11858/gywlxb.2003.02.004
Citation: ZHAO Xian-Feng, HONG Shi-Ming, LIU Fu-Sheng. Effect of Pressure on Carbon Concentration in C-H-O Supercritical-Fluid[J]. Chinese Journal of High Pressure Physics, 2003, 17(2): 101-105 . doi: 10.11858/gywlxb.2003.02.004
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Effect of Pressure on Carbon Concentration in C-H-O Supercritical-Fluid

doi: 10.11858/gywlxb.2003.02.004

  • Laboratory of High Pressure Physics, Southwest Jiaotong University, Chengdu 610031, China

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  • Corresponding author: ZHAO Xian-Feng
  • Received Date: 06 Aug 2002
  • Rev Recd Date: 16 Oct 2002
  • Publish Date: 05 Jun 2003
    Abstract
  • By statistical thermodynamics methods and CHEQ code, the concentrations of carbon in the system of graphite-water were calculated at 5.5~7.7 GPa and 1 000~2 900 K. Relation between the concentration of carbon in water and the pressure was mainly studied. Results could be summarised as follows: (1) At a fixed pressure, there is a definite down-limit and a up-limit of temperature, between them the concentration difference of graphite and diamond in water X(C) is positive; (2) Under a definite pressure, there is a maximum of the concentration difference of graphite and diamond in water. Both of the maximum of X(C) and the temperature, which make X(C) maximum, increase with the increase of the pressure remarkably.

     

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