Furthermore, the method includes the step of separating {HEAD ~ the flue gas} into an end product portion and {TAIL ~ a recycling portion} 
into
Furthermore , the method includes the step of separating { HEAD ~ the flue gas } into an end product portion and { TAIL ~ a recycling portion }
OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL