{HEAD ~ A portion} of the carbon dioxide product stream is utilized in the PSA unit as {TAIL ~ a cocurrent purge} at a pressure preferably above the operating pressure of the carbon dioxide PSA unit to obtain a product of higher purity 
is utilized as
{ HEAD ~ A portion } of the carbon dioxide product stream is utilized in the PSA unit as { TAIL ~ a cocurrent purge } at a pressure preferably above the operating pressure of the carbon dioxide PSA unit to obtain a product of higher purity
HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH REL REL OTH OTH OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH