摘要
通过实验研究了不同煤阶煤样在不同压力条件下吸附不同气体的综合传质系数α的变化规律。结果表明:α随着压力的增加而增加且呈指数变化关系;在相同压力下,α随着煤阶的增加而减小;煤层中注入的CO2优先提高CH4的解吸速率,增加了CO2对CH4的置换量。该结果从理论上说明了注入CO2提高煤层气采收率的有效性和可行性。
The law of the change of the combination mass transfer coefficient α was studied for the adsorption of different gases by different coal rank samples under different pressures.The results suggest： a positive correlation was found between α and pressure;a negative correlation was found between α and coal ranks.CO2 injection proferentially increased the desorption rate of CH4,and enhances the displacement volume of CO2 to CH4.The superiority and feasibility of CO2 injection to enhance CBM recovery was theoretically proved.
出处
《太原理工大学学报》
CAS
北大核心
2009年第5期518-520,524,共4页
Journal of Taiyuan University of Technology
基金
山西省科技攻关基金资助项目(2007031120-02)
科技部支撑计划项目(2007BAK29B01)
关键词
含瓦斯煤粒
综合传质系数
煤层气
注入CO2
提高采收率
methane-bearing coal particle
combination mass transfer coefficient
coalbed methane
CO2 injection
enhanced recovery
