摘要
为消除低浓度煤层气对煤层开采存在的安全隐患，提出了利用甲烷和氧气在炭分子筛上的动力学差异进行脱氧的工艺。采用容积法测定了纯CH4和O2在炭分子筛颗粒上的吸附动力学数据，并利用单床变压吸附装置测定了混合气体在298．15K，各压力下的穿透曲线。研究结果显示：吸附初期，O2在CMS上的扩散速率明显大于CH4；在混合体系穿透曲线上，O2的穿透时间远大于CH4，炭分子筛固定床表现出对O。的优先吸附选择性，可以实现出口直接富集甲烷的目的。0．4MPa时，当产品气中CH4含量为92．44％时，CH4回收率为73．27％。
In order to eliminate the safety hidden peril existed in the seam mining on the coal bed methane in the low gassy mine, a deoxidation technique based on the kinetic difference of CH4 and O2 on carbon molecular sieve （CMS） was put forward. The volume method was applied to get kinetic data of pure CH4 and O2 adsorbed on CMS. And a study of the breakthrough curve was carried out on one-bed pressure swing adsorption apparatus. The study results show that the diffusion rate of O2 is larger than CH4 at the initial time of adsorption. It demonstrates from the breakthrough curve that CH4 is first through the fixed be＆ Thus CH4 can be enriched directly at the outlet. 0.4MPa, the recovery of CH4 is 73.27% when the concentration of CH4 is 92.44% .
出处
《炭素》
2013年第2期36-41,共6页
Carbon
关键词
CH4
O2
炭分子筛
吸附动力学
穿透曲线
CH4/O2
carbon molecular sieve （CMS）
adsorption kinetics
breakthrough curve
