Volume fraction of and as well as measured temperature for a CLOU experiment in a batch fluidized bed reactor, where 0.1 g petroleum coke reacted with 15 g oxygen carrier. The concentration during regeneration of the oxygen carrier is 21%. The set-point temperature is 985°C and the fluidizing gas is pure nitrogen. Also included is the equilibrium concentration of , as determined from the temperature measurement in the bed (+). Taken from [68].