Spent Isopropanol Solution as Possible Liquid Fuel for Moving Bed Reactor in Chemical Looping Combustion

Isopropanol (IPA) solution as liquid fuel for chemical looping combustion (CLC) with Fe2O3/Al2O3 oxygen carriers was investigated by a moving bed reactor. CO and H-2 were the fuel gases generated by IPA solution in the moving bed reactor prior to combustion with oxygen carriers. The yields of fuel gas generated from IPA solution were determined to modify the equation of oxygen carrier-to-fuel ratio for moving bed operation. The IPA conversion and CO2 yield in the outlet stream from moving bed reactor reached 100% as oxygen carrier-to-fuel ratio was higher than 7.94 at 900 degrees C. Heat balance for input and output processing capacities is approximately achieved by theoretical estimation. By analysis of system processing capacity, 70% of output processing capacity is available for energy use of external facility. By analysis of processing efficiency, aqueous solution as liquid fuel would cause considerable heat consumption for water evaporation, especially for dilute solution. Chemical looping combustion is suggested to be an alternative treatment technology with positive processing capacity for spent organic solvent as heat is well recovered in liquid fuel CLC system.