The process utilizes {HEAD ~ three adsorbent layers}, the first primarily removes water; the second primarily removes CO2; and the third layer is designed to remove displaced gas components such as N2O and hydrocarbons which are displaced by {TAIL ~ the second layer} 
The process utilizes { HEAD ~ three adsorbent layers } , the first primarily removes water ; the second primarily removes CO2 ; and the third layer is designed to remove displaced gas components such as N2O and hydrocarbons which are displaced by { TAIL ~ the second layer }
OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL