Coal Direct Chemical Looping Process Development and Scale-Up

摘要

The Coal-Direct Chemical Looping (CDCL) process is emerging as a promising technology capable of high efficiency for producing electricity with low cost for carbon capture. In the CDCL process, coal is fully combusted to form carbon dioxide (CO_2) and water via reaction with Fe_2O_3-based oxygen-carrier particles in a moving-bed reducer reactor. During reaction with coal, the Fe_2O_3 is reduced to form amixture of Fe and FeO. The reduced particles are then transported to the combustor reactor where they are re-oxidized with air. The oxidation of the Fe and FeO mixture generates heat that can be used to produce steam for power generation. Once the particles are fully regenerated, they are pneumatically recycled to the reducer reactor where another reduction-oxidation (Redox) cycle begins.