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压力对碳氢氧超临界流体中碳的溶解度的影响

DOI: 10.11858/gywlxb.2003.02.004, PP. 101-105

Keywords: 高压,碳氢氧超临界流体,金刚石合成

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Abstract:

采用统计热力学方法,利用CHEQ程序对5.5~7.7GPa的压力和1000~2900K温度下碳加水体系中碳的溶解度进行了计算。重点研究了石墨和金刚石在水中溶解度差与压力的关系,得出如下结果:(1)在一定压力下,使石墨和金刚石在水中的溶解度之差ΔX(C)为正值的温度有确定的下限和上限。(2)在高温高压下,对每一个压力,石墨和金刚石在水中的溶解度之差ΔX(C)都有一个极大值。使ΔX(C)为极大值的温度随着压力的升高而增大,同时,溶解度差的极大值本身也随压力的升高而增大。

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