煤粒瓦斯解吸实验中的初始有效扩散系数

发布时间：2018-05-02 16:36

本文选题：煤粒 + 吸附平衡压力　；参考：《辽宁工程技术大学学报(自然科学版)》2016年11期

【摘要】：为研究煤体瓦斯解吸过程瓦斯初始扩散规律,采用理论分析煤粒瓦斯解吸扩散过程,根据扩散方程解析得到瓦斯初始有效扩散系数和扩散动力学参数的近似解计算方法.对振兴二矿煤样进行不同粒径煤样、不同温度条件和不同吸附平衡压力条件下的煤粒瓦斯解吸扩散实验,并计算各种实验状态下的瓦斯初始有效扩散系数和扩散动力学参数.研究结果表明:初始有效扩散系数与吸附平衡压力、温度和煤样粒径呈正相关.不同粒径的煤粒,在压力和温度相同的平衡条件下,煤粒的粒径越大,初始有效扩散系数越大.同一粒径条件下,初始有效扩散系数随温度和吸附平衡压力的升高而增大.而动力学扩散参数则基本随着粒径的减小而增大,随吸附平衡压力和温度的升高而增大.
[Abstract]:In order to study the law of initial gas diffusion in the process of gas desorption of coal body, the theoretical analysis of the process of gas desorption and diffusion of coal particles was carried out, and the approximate solution method of the initial effective diffusion coefficient and the diffusion kinetic parameters was obtained according to the diffusion equation. The desorption and diffusion experiments of coal samples with different particle sizes, different temperature conditions and different adsorption equilibrium pressures were carried out, and the initial effective diffusion coefficient and diffusion kinetic parameters of gas were calculated under various experimental conditions. The results show that the initial effective diffusion coefficient is positively correlated with adsorption equilibrium pressure, temperature and coal particle size. Under the same equilibrium conditions of pressure and temperature, the larger the particle size is, the greater the initial effective diffusion coefficient is. Under the same particle size, the initial effective diffusion coefficient increases with the increase of temperature and adsorption equilibrium pressure. The kinetic diffusion parameters increase with the decrease of particle size and with the increase of adsorption equilibrium pressure and temperature.
【作者单位】：华北科技学院安全工程学院;中国矿业大学(北京)资源与安全工程学院;
【基金】：中央高校基本科研业务费项目(3142015002,3142014012) 河北省高等学校科学技术研究项目(Z2015104)
【分类号】：TD712

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