Abstract
Chemical looping gasification (CLG) is a novel technology using lattice oxygen in a solid oxygen carrier (OC) for syngas production. The present work investigated the CLG performance of coal in a 5 kWth interconnected fluidized bed, in which the fuel reactor was designed as a two-stage-based circulating bed. The fresh OC from the air reactor entered into the upper stage of the fuel reactor, in which it was reduced by syngas. Then, the partial reduction of the OC was circulated to the bottom stage of the fuel reactor to be reduced further to low-valence metal oxide and catalyze the process of coal gasification. Afterward, the reduced OC was transported to the air reactor for regeneration. The influences of the coal feeding rate, gasification temperature, and gasification agent on the performance of CLG were evaluated in detail. The syngas yield and gasification efficiency were remarkably influenced by the coal feeding rate, with an optimal value of 487.5 g/h in the current unit. The high temperature promot...
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