不同变质等级煤吸附甲烷的能量计算与模拟。,ACS Omega

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不同变质等级煤吸附甲烷的能量计算与模拟。
ACS Omega ( IF 3.7 ) Pub Date : 2020-06-16 , DOI: 10.1021/acsomega.0c00462
Xiangchun Li _{1,

2,

3} , Xiaolong Chen ₁ , Fan Zhang ₁ , Mengting Zhang ₁ , Qi Zhang ₁ , Suye Jia ₁

Affiliation

吸附过程中比能的变化规律是研究煤气吸附机理的重要依据。根据吸附能理论，在三个不同温度（30、40和50°C）和六个不同压力（0.1、0.2、0.6、1.0、1.4，和1.8 MPa）。然后，使用单层吸附模型和多层吸附模型来计算吸附过程中的能量变化。就像吸附能力一样，很明显，比表面能与温度成反比，与气体压力成反比。单层吸附与多层吸附计算之间的能量差较大。因此，根据发热量计算吸附能，对比分析表明，基于多层吸附模型的比表面能比单层吸附模型能更好地反映气体的吸附能力。探索了气体吸附的机理，例如分子间力，能量变化和比表面积。模拟了吸附能，表明能量变化受煤的物理性质和内部化学结构的影响。能量变化和比表面积。模拟了吸附能，表明能量变化受煤的物理性质和内部化学结构的影响。能量变化和比表面积。模拟了吸附能，表明能量变化受煤的物理性质和内部化学结构的影响。

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Energy Calculation and Simulation of Methane Adsorbed by Coal with Different Metamorphic Grades.

The law of specific surface energy variation during the adsorption process is an important basis for studying the mechanisms of coal gas adsorption. Based on the theory of adsorption energy, eight coal samples with different ranks were analyzed using an isothermal adsorption experiment at three different temperatures (30, 40, and 50 °C) and six different pressures (0.1, 0.2, 0.6, 1.0, 1.4, and 1.8 MPa). Then, the single-layer adsorption model and multilayer adsorption model were used to calculate the energy variation during the adsorption process. Just like the adsorption capacity, it is clear that the specific surface energy is inversely proportional to temperature and proportional to gas pressure. The energy difference between the single-layer adsorption and the multilayer adsorption calculation is large. Therefore, the adsorption energy was calculated based on the calorific value, and the comparative analysis shows that the specific surface energy based on the multilayer adsorption model can better reflect the gas adsorption capacity than the single-layer adsorption model. The mechanisms of gas adsorption were explored, such as intermolecular force, energy variation, and specific surface area. The adsorption energy was simulated, which indicated that the energy variation is affected by both coal physical properties and internal chemical structure.

更新日期：2020-06-30

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