| 方解石,白云石,菱铁矿分别与含CO2水溶液反应平衡时的温度和压力 |
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| 引用本文： | 蔡杰兴.方解石,白云石,菱铁矿分别与含CO2水溶液反应平衡时的温度和压力[J].矿物岩石,1993,13(2):37-41. |
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| 作者姓名： | 蔡杰兴 |
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| 作者单位： | 重庆煤炭工业学校 重庆 |
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| 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。
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| 关 键 词： | 方解石 菱铁矿 二氧化碳 温度 |
TEMPERATURE AND PRESSURE IN EQUILIBRIUM STATE WHILE CALCITE,DOLOMITE AND SIDERITE REACTING ON LIQUID WATER CONTAINING CO_2 RESPECTIVELY |
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| Cai Jixin.TEMPERATURE AND PRESSURE IN EQUILIBRIUM STATE WHILE CALCITE,DOLOMITE AND SIDERITE REACTING ON LIQUID WATER CONTAINING CO_2 RESPECTIVELY[J].Journal of Mineralogy and Petrology,1993,13(2):37-41. |
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| Authors: | Cai Jixin |
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| Abstract: | 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. |
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| Keywords: | calcite standard enthalpy change free enthalpy change ritical temperature ritical pressure |
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