abstract |
The rate of recovery of a purification target gas from a gas purification apparatus that uses a PSA device is improved, and both a high purity and a high recovery rate are achieved with good power efficiency. The present invention is directed to a gas purification method using the PSA method, in which a carbon molecular sieve having a pore volume, at a pore diameter of 0.38 nm or more, of not exceeding 0.05 cm3/g and a pore volume, at a pore diameter of 0.34 nm, of 0.15 cm 3/g or more, in a pore diameter distribution measured by the MP method is used as an adsorbent, and, in an adsorption step, a miscellaneous gas is adsorbed from a source gas by bringing the source gas into contact with the adsorbent for 10 seconds or more and 6000 seconds or less so as to obtain a concentrated methane. 10637622_1 (GHMatters) P100975.AU.1 uej seb jonPOJd 0 --> 00 (Y) > 0 CL 0 Q-- CY) > 00 C\l t-- > 04 0 "1" > 00 > co > > A: _j > > C\l cy.) CY) 00 CY) cy.) CY) C\l CY) > 00 CY) 00 MY) > Cl) i(y) coY > j CY) cy') CY) CY) -i _j > (Y) CY) > C\l CY) CY) C\J CN C, j > C C, CC) C14 > 00 j omo \4 > NT C\, C,4_J C14 j > C%4 04 N (N _,14 -i > C'14 cr) CY) C\l __JCY) > 00 t-,A > > n Q) 0 0 ,02 Nuel ser) C) _tL |