temperature of gas and partially oxidize excess methane to produce additional h2 and co for the dri process air for oxygen transport membrane can heated in the fired heater used for heating the dri reducing gases alternatively the oxygen transport membrane can be embedded inside the fired heater used for heating dri reducing gas to improve the performance of otm and avoid heat losses the combined heating of reducing gas and otm will save on capital cost for the furnace and piping etc the exhaust gas from the dri shaft furnace along with make up syngas can be used as fuel for the fired heater retentate side gas is at high temperature u02dc 900 u00b0 c and sensible heat is recovered by pre heating air or generating steam or pre heating reducing gas for the dri process retentate stream will contain unrecovered oxygen 3 18 and it can be used for combustion process in the fired heater both dri exhaust gas and make up syngas are cleaned to remove co 2 and other impurities gas cleaning can be combined or done separately for the two streams coal gasifier operates at much high pressure than the dri shaft furnace make up syngas is expanded in a turbo expander or any other expansion device electricity generation from turbo expander may be used to compress exhaust gas or any other purpose in the dri process coal gasification is a process that converts coal from a solid to a gaseous fuel through partial oxidation as given in equation 1 the amount of inlet oxygen is controlled carefully to provide heat of reaction and partially oxidize coal to produce hydrogen and co along with other by products such as co 2 ch.