摘要
本文运用热力学原理确立了方解石、白云石、菱铁矿分别与含CO_2水溶液反应平衡时的温度和压力函数关系式。它们反应平衡所需要的最高临界温度分别为266K,264K和261K,最低临界压力分别为86.5MPa,106.8MPa和133.7MFa;在含CO_2水溶液中的溶解度均随压力增大、温度降低而增加;其生成则随压力减小和温度升高而变易。当温度、压力和水中含CO_2的量相同时,它们的溶解度大小顺序是方解石>白云石>菱铁矿。
The article establishes, by means of thermodynamics,the functions of temperature and pressure in the equlibrium state while calcite,dolomite and siderite react on liquid water containing gas CO_2. Their highest critical temperatures are 266K and 264K and 261K and their lowest critical pressures 86. 5MPa,106. 8MPa and 133. 7MPa respectively. The solubility of the three minerals in the liquid water containing gas CO_2 increases with the increase of pressure and decrease of temperature,and their production varies with the decrease of pressure and increase of temperature. When the temperature,pressure and the amount of CO_2 keep constant,the solubility of the three minerals is as follows:calite>dolomite>siderite.
出处
《矿物岩石》
CAS
CSCD
1993年第2期37-41,共5页
Mineralogy and Petrology
关键词
方解石
菱铁矿
二氧化碳
温度
calcite
standard enthalpy change
free enthalpy change
ritical temperature
ritical pressure
