Mengxiang Fang

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1. Introduction In the context of carbon neutrality, the DFB (dual fluidized bed) reactor has attracted more and more attention [1]. A DFB reactor is a coupling of two fluidized beds, which is widely used in a variety of energy efficient and clean utilization technologies, including coal staged conversion technology [2], biomass gasification technology [3], chemical looping combustion technology [4], and calcium looping technology [5].