MIXED-OXIDES FOR CARBONACEOUS FUEL CONVERSION WITH INTEGRATED CO2 CAPTURE VIA CHEMICAL LOOPING WITH OXYGEN UNCOUPLING (CLOU)

摘要

The concept of cyclic redox conversion of carbonaceous fuels was proposed over half a century ago. "Rediscovered" as an effective approach for fossil fuel conversion and CO2 capture, the chemical looping concept has captured significant attention within the last two decades. In a CLC scheme, lattice oxygen in a solid oxygen carrier is used to fully oxidize a carbonaceous fuel, producing a stream of carbon dioxide and steam which can be easily separated. The reduced oxygen carrier is then transferred to a subsequent reactor for regeneration with air and/or steam. The cyclic redox operation avoids the needs for oxygen separation and reduces CO2 capture cost. To date, more than 700 oxygen carriers have been synthesized.