Keywords: ACQS; air quality control system; AD; Aspen Plus Dynamics; AH; air heater; AP; Aspen Plus; ASU; air separation unit; AT1, 2, 3; spray water attemperators; BI_O2; boiler inlet O2; CC_O2; flue gas O2 control; CC_OXY; oxidant O2 control; CCS; carbon capture