Assessment of chemical looping-based conceptual designs for high efficient hydrogen and power co-generation applied to gasification processes

The aim of this paper was to propose and evaluate conceptual designs of large scale coal gasification plants with pre- and post-combustion capture based on various chemical looping options. Hydrogen and power co-generation was evaluated as potential way to increase energy efficiency of such plants. The plant concepts generated around 420-600 MW net electricity with at least 90% carbon capture rate. For co-generation scenario, a flexible hydrogen output was evaluated in the range of 0-200 MWth (LHV). The results showed net electrical efficiency ranging from 35 to 41%, most of the cases having an almost total carbon capture rate (>99%). Hydrogen co-production show as promising way for efficiency increase.