雷红艳. 煤吸附CO2压缩因子快速计算模型研究[J]. 煤矿安全,2024,55(6):40−48. doi: 10.13347/j.cnki.mkaq.20231354
    引用本文: 雷红艳. 煤吸附CO2压缩因子快速计算模型研究[J]. 煤矿安全,2024,55(6):40−48. doi: 10.13347/j.cnki.mkaq.20231354
    LEI Hongyan. Study on rapid calculation model of CO2 compression factor for coal adsorption[J]. Safety in Coal Mines, 2024, 55(6): 40−48. doi: 10.13347/j.cnki.mkaq.20231354
    Citation: LEI Hongyan. Study on rapid calculation model of CO2 compression factor for coal adsorption[J]. Safety in Coal Mines, 2024, 55(6): 40−48. doi: 10.13347/j.cnki.mkaq.20231354

    煤吸附CO2压缩因子快速计算模型研究

    Study on rapid calculation model of CO2 compression factor for coal adsorption

    • 摘要: 为研究Virial、V-d-W、R-K、S-R-K、P-R、童景山等6种工程常用气体状态方程中适合煤吸附CO2压缩因子最优方程及快速计算模型,以3种不同变质程度煤样为研究对象,采用容量法实测了试验温度为30 ℃时应用以上6种方程所得煤的CO2吸附量、CO2吸附常数及吸附等温线。研究表明:与美国国家标准技术研究所(NIST)提供的CO2压缩因子相比,采用Virial状态方程得到的CO2压缩因子最大、绝对误差最小,为0.38%;吸附等温线拟合优度最高,CO2吸附常数a值绝对值误差最小,确定出煤吸附CO2压缩因子最优方程为Virial方程;同时,提出试验温度为30 ℃时,CO2压缩因子一种简便快捷计算模型,经检验,该模型相对美国标准计算所得CO2吸附常数a值绝对值误差最大不超过1%,且操作简便,快速精确。

       

      Abstract: In order to study the optimal equation and fast calculation model of CO2 compression factor suitable for coal adsorption among 6 kinds of gas state equations commonly used in engineering, such as Virial, V-d-W, R-K, S-R-K, P-R and Tongjingshan, three coal samples with different metamorphism degrees were taken as research objects. The CO2 adsorption capacity, CO2 adsorption constant and adsorption isotherm of coal obtained by using the above six equations at the test temperature of 30 ℃ were measured by volumetric method. The research shows that: compared with the CO2 compression factor provided by the National Institute of Standards and Technology (NIST), the maximum absolute error of CO2 compression factor obtained by Viral state equation is 0.38%. The adsorption isotherm has the highest goodness of fit; the absolute value error of the measured CO2 adsorption constant a is the smallest, and the optimal gas state equation to determine the adsorption CO2 compression factor of coal is the Viral equation. At the same time, a simple and fast calculation model of CO2 compression factor is proposed when the test temperature is 30 ℃. After testing, the absolute error of the absolute value of the CO2 adsorption constant a calculated by the US standard is less than 1%, and the operation is simple, fast and accurate.

       

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