| FeS2-H2O系综合平衡电势-pH图及其应用 |
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| 引用本文： | 易平贵,刘俊峰,金一粟. FeS2-H2O系综合平衡电势-pH图及其应用[J]. 湖南科技大学学报(自然科学版), 1999, 14(1) |
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| 作者姓名： | 易平贵 刘俊峰 金一粟 |
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| 作者单位： | 湘潭矿业学院化学工程系,湖南湘潭,411201 |
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| 摘 要： | 根据综合平衡原理，建立和讨论了一种新型的ＦｅＳ２－Ｈ２Ｏ系电势－ｐＨ图及该体系中溶液态物质的浓度分布函数单质硫只有较小的稳定区且依赖于溶液中含硫物种总浓度Ｃｔ（Ｓ）和Ｈ２Ｓ气体的分压大小，当Ｃｔ（Ｓ）固定时，分压小于某临界值后单质硫的稳定区将消失Ｆｅ２Ｏ３（Ｓ）和ＦｅＳ２（Ｓ）的稳定区均很大，Ｆｅ２Ｏ３的稳定性与溶液中含铁总浓度Ｃｔ（Ｆｅ）有关，而ＦｅＳ２的稳定性与Ｃｔ（Ｓ）、Ｃｔ（Ｆｅ）及Ｈ２Ｓ气体的分压均有关图３，表３，参４
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| 关 键 词： | 电势-pH图 FeS_2-H_2O系 综合平衡 热力学 |
OVERALL EQUILIBRIUM POTENTIAL-pH DIAGRAM FOR FeS2-H2O SYSTEM AND ITS APPLICTION |
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| Yi Pinggui,Liu Junfeng,Ji Yisu. OVERALL EQUILIBRIUM POTENTIAL-pH DIAGRAM FOR FeS2-H2O SYSTEM AND ITS APPLICTION[J]. Journal of Hunan University of Science & Technology(Natural Science Editon), 1999, 14(1) |
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| Authors: | Yi Pinggui Liu Junfeng Ji Yisu |
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| Abstract: | A new type of potential-pH diagram and concentration distribution functions of aqueous species for FeS2-H2O system are established and discussed by overall equilibrium principle. The stable region of elemental sulfer is little and narrow,and depends on the total concentration Ct(S) of all species in solution and partial pressure pH2S/p of H2S gas. For the Ct(S) fixed,the stable region of sulfur disappears when pH2S/p is lower than correspending critical value. Both Fe2O3 and FeS2 are of big stable region, and the stability of Fe2O3 is related to total concentration Ct(S) of Fe2 and Fe3 in solution, the stability of FeS2 is affected by Ct(S) and Ct(Fe) and pH2S/p.3figs.,3tabs.,4refs. |
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| Keywords: | potential-pH diagram FeS2-H2O system overall equilibrium thermodynamics |
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