In {TAIL ~ a second dual bed} adsorber 18, the gaseous stream is contacted with {HEAD ~ a bed} of LiAgX adsorbent under the conditions described above 
In { TAIL ~ a second dual bed } adsorber 18 , the gaseous stream is contacted with { HEAD ~ a bed } of LiAgX adsorbent under the conditions described above
OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH