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Experimental and theoretical study of CO2 adsorption by activated clay using statistical physics modeling

机译：统计物理建模活化粘土对二氧化碳吸附的实验与理论研究

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The objective of this paper was to study CO2 adsorption on activated clay in the framework of geological storage. The activation of clay was characterized via scanning electron microscopy, N-2 adsorption-desorption isotherms, and X-ray diffraction. The adsorption isotherms were generated at different temperatures, namely, 298 K, 323 K, and 353 K. Based on the experimental result, a new model was simulated and interpreted using a multi-layer model with two interaction energies. The physicochemical parameters that described the CO2 adsorption process were determined by physical statistical formalism. The characteristic parameters of the CO2 adsorption isotherm such as the number of carbon dioxide molecules per site (n), the receptor site densities (NM), and the energetic parameters were investigated. In addition, the thermodynamic functions that governed the adsorption process such as the internal energy, entropy, and Gibbs free energy were determined by a statistical physics model. Thus, the results showed that CO2 adsorption on activated clay was spontaneous and exothermic in nature.
机译：本文的目的是研究地质储存框架中活化粘土的CO 2吸附。通过扫描电子显微镜，N-2吸附 - 解吸等温和X射线衍射表征粘土的活化。在不同的温度下产生吸附等温，即，基于实验结果，使用具有两个交互能量的多层模型进行模拟和解释新模型。描述了CO 2吸附过程的物理化学参数通过物理统计形式主义确定。研究了CO2吸附等温线的特征参数，例如每位位点（N），受体位点密度（NM）和能量参数的二氧化碳分子数。此外，通过统计物理模型确定了治理的吸附过程，例如内部能量，熵和Gibbs自由能量的热力学功能。因此，结果表明，活化粘土上的CO 2吸附是自然的，放热本质上。

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    《RSC Advances》 |2019年第66期|共10页
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  • 正文语种 eng
  • 中图分类 化学;
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