In a circulating fluidised bed (CFB) system consisting of two separate reactors, an oxygen carrier in the form of a metal oxide is transported from the air reactor (AR) to the fuel reactor (FR). The metal oxide is reduced by the fuel and then transported to the AR where it is re-oxidised by the air. The main advantage of these technologies is that the combustion gas is kept separated from the rest of the flue gas, and so the CO2 [CO tief 2] can be captured easily.
This thesis represents the experimental work carried out for the further development of a compact laboratory scale reactor system for CLC and CLR. Based on earlier investigations on an existing cold flow model, different design improvements with the predominating aim to reduce gas leakage between the two reactors were carried out and the fluid dynamics of two similar reactor concepts were studied experimentally. The solid circulation rate and the gas leakage were investigated against variation of the amount of solid inventory, the fluidisation rate of the air reactor and the fluidisation rate of the fuel reactor.
Additionally, the effects of geometrical modifications of the downcomer and the slot section were studied and the measured values were compared with the original model.