Abstract
Chemical looping combustion (CLC) currently is an attractive option to decrease the greenhouse gas emissions that affect global warming, because it is a combustion process with inherent CO2 separation and with low energy losses. The CLC concept is based on the transfer of oxygen from the combustion air to fuel by means of an oxygen carrier in the form of a metal oxide. The system consists of two separate but interconnected reactors, normally fluidized-bed type. In the fuel reactor, the oxygen carrier particles react with fuel and generate a gas stream mainly composed of CO2 and H2O. The reduced metal oxide is later transported to the air reactor, where oxygen from the air is transferred to the particles; in this way, one can obtain the original metal oxide ready to be returned to the fuel reactor for a new cycle. In this work, a 10 kWth pilot plant that is composed of two interconnected bubbling fluidized-bed reactors has been designed and built to demonstrate the CLC technology. The prototype was operate...
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