Effect of support on the behavior of Cu-based oxygen carriers during long-term CLC operation at temperatures above 1073 K

Chemical-Looping Combustion (CLC) is a combustion technology with CO2 capture that is characterized by its low energy penalties because the CO2 separation is inherent to the process. The CLC concept is based on the transfer of oxygen from the combustion air to fuel by means of an oxygen carrier (OC) in the form of a metal oxide. The OC circulates between two interconnected reactors, the fuel (FR) and the air reactor (AR). To scale up the CLC process for industrial application OC materials suitable to work at high temperatures are needed. Cu-based OCs had been proved to fulfill the requirements for an OC material, although operating temperatures lower than 1073 K were recommended due to its likely agglomeration problems. In this work, several Cu-based OCs have been developed by impregnation on different supports. The supports were prepared by thermal or chemical modifications of commercial γAl2O3 with the aim to reduce the interaction with the metal oxide. The behavior of the OCs was studied in a CLC conti...

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