Methane separation from coal mine methane gas by vacuum pressure swing adsorption
Methane separation from coal mine methane gas by vacuum pressure swing adsorption
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DOI：
10.1205/026387603765173736
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发表时间：
2003-04-01
影响因子：
3.9
通讯作者：
Dula, J
中科院分区：
文献类型：
--
作者：
Olajossy, A;Gawdzik, A;Dula, J
研究结果来自于用于从煤矿甲烷气体中回收甲烷的 VPSA（真空变压吸附）工艺的实验室调查和计算机计算。煤甲烷气分离过程的温度为278 K，吸附压力为300 kPa绝对压力，解吸压力为25 kPa绝对压力。将CH4含量为55.2vol%的煤矿瓦斯气富集成CH4含量为96-98vol%的富甲烷瓦斯。甲烷回收率达到86-91%，再循环甲烷与进料引入甲烷的比例在P/F=1.8-2.12之间。在这些条件下，吸附流出气体中的甲烷含量为11-15体积％，同时氮和氧从富含甲烷的气体中去除了96-98％。当在吸附阶段将甲烷吸附波带到吸附床的出口点，然后在逆流吹扫阶段将甲烷吸附波带到吸附床的入口点时，可以实现煤矿瓦斯的分离水平。
he findings were presented from laboratory investigations and computer calculations for the VPSA (vacuum pressure swing adsorption) process employed to recover methane from coal mine methane gas. The separation process of coal methane gas was carried out at temperature of 278 K under adsorption pressure equal 300 kPa abs., and desorption pressure equal 25 kPa abs. Coal mine methane gas with the CH4 content of 55.2 vol% was enriched into methane-rich gas which contained 96-98 vol% CH4. The methane recovery efficiency reached 86-91% with the ratio for re-circulated methane to that introduced with the feed falling within P/F = 1.8-2.12. The methane content in the adsorption effluent gas was 11-15 vol% under those conditions while nitrogen and oxygen were removed at 96-98% from the methane-rich gas. That separation level of the coal mine gas can be achieved when the methane sorption wave is brought to the outlet point of the sorption bed at the adsorption phase, and then the methane sorption wave is brought to the entry point of the sorption bed at the counter-current purge phase.