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碳酸钙纳米孔隙中凝聚水数学模型及实验研究

胡云皓 于青春

胡云皓, 于青春. 碳酸钙纳米孔隙中凝聚水数学模型及实验研究[J]. 中国岩溶, 2020, 39(3): 311-318.
引用本文: 胡云皓, 于青春. 碳酸钙纳米孔隙中凝聚水数学模型及实验研究[J]. 中国岩溶, 2020, 39(3): 311-318.
HU Yunhao, YU Qingchun. Mathematical modeling and experimental study on water condensation in nanopores of calcium carbonate[J]. CARSOLOGICA SINICA, 2020, 39(3): 311-318.
Citation: HU Yunhao, YU Qingchun. Mathematical modeling and experimental study on water condensation in nanopores of calcium carbonate[J]. CARSOLOGICA SINICA, 2020, 39(3): 311-318.

碳酸钙纳米孔隙中凝聚水数学模型及实验研究

基金项目: 国家自然科学基金项目(41877196,U1612441)

Mathematical modeling and experimental study on water condensation in nanopores of calcium carbonate

  • 摘要: 岩石纳米孔隙中的凝聚水与许多水文地质工程地质问题关系密切:干旱区凝聚水是维持当地生态平衡的重要水资源,石雕石刻文物保护中凝聚水问题是需要考虑的关键因素之一,页岩气工程中页岩纳米孔隙中的凝聚水对页岩气的聚集和流动有重要影响,全球碳循环问题中凝聚水会影响C02与碳酸盐岩的作用。本文给出了单位体积岩石形成的凝聚水的质量与温度、相对湿度、孔隙度、颗粒大小之间数学关系式。在这一关系式中,通过分离压理论计算吸附水,通过开尔文方程考虑了毛细作用。把解析计算结果与三个平行样四个不同湿度下的凝聚水量实验值对比,对所提出的数学表达式进行了验证。实验时选取直径500 nm的碳酸钙球形颗粒,采用夯实的办法加工成样,把样品置于恒温恒湿环境中令水汽在孔隙中凝聚,定期对样品称重计算凝聚水质量,直到凝聚过程达到平衡。

     

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  • 刊出日期:  2020-06-25

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