(358b) Design of a Chemical-Looping Combustion System Using Solids and Gaseous Fuels

Climate changing is a critical concern through out the world and it is due mostly to the burning of fossil fuels in the power plants.  Nearly 80% of energy production is from the combustion of fossil fuels and green house gas such as carbon dioxide emits into the atmosphere on the combustion of all fossil fuels. Chemical looping combustion (CLC) is a unique technology for carbon capture and is for the separation of carbon dioxide from nitrogen and excess air. In this process fuel is burnt using oxygen rich metal oxide. The oxygen carrier particles circulates in a reactor system composed of a fuel reactor, where oxygen carrier particles are reduced by the fuel, and an air reactor, where the particles are regenerated to the oxidized state. Method of determination of coal molecular formula will be presented. Coal combustion and heat of formation will be discussed. Mass and energy balance of the CLC reactors will be presented for both solid and gaseous fuels. A simplified mathematical relation is developed for solids circulation in the CLC reactors. Parameters such as nature of oxygen carrier, carrier oxidation state, carrier conversion, and fuel rate will be discussed.