During the combustion of a fuel in a combustion chamber enclosing a fluidized bed, a fuel and {HEAD ~ an absorbent} are supplied to {TAIL ~ the fluidized bed} 
are supplied to
During the combustion of a fuel in a combustion chamber enclosing a fluidized bed , a fuel and { HEAD ~ an absorbent } are supplied to { TAIL ~ the fluidized bed }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL