It has been found that CaX type adsorbents provide the removal of N2O and {HEAD ~ hydrocarbons} in {TAIL ~ the third layer} 
in
It has been found that CaX type adsorbents provide the removal of N2O and { HEAD ~ hydrocarbons } in { TAIL ~ the third layer }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL