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