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- W4245907208 abstract "This chapter mainly considers those fluidized bed reactors where the fluidizing fluid is a gas and the gas and the particles both move downwards co-currently in a vertical pipe or column. It illustrates the essential concept of a downer reactor and a practical downer in a circulating fluidized bed system. The chapter presents the basic hydrodynamic behaviour in downers with force balance analysis and the mixing behaviour of solids in downers. Theoretical modelling is helpful for scale-up, reactor design, and operation of downers. Different hydrodynamic models have been proposed such as reaction engineering model, Eulerian–Eulerian computational fluid dynamics (CFD) model, and Eulerian–Lagrangian CFD model. The chapter details the design of downer reactors focusing on inlet design, gas–solid separator at the downer outlet, and the downer–riser coupled reactors. Downer reactors find applications in fluid catalytic cracking process, gasification processes for conversion of fossil fuels, and coal pyrolysis to acetylene." @default.
- W4245907208 created "2022-05-12" @default.
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- W4245907208 date "2020-03-27" @default.
- W4245907208 modified "2023-10-16" @default.
- W4245907208 title "Downer Reactors" @default.
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- W4245907208 doi "https://doi.org/10.1002/9783527699483.ch20" @default.
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