A fluidized bed reactor (FBR) is a type of reactor device that can be used to carry out a variety of multiphase chemical reactions. In this type of reactor, a fluid (gas or liquid) is passed through a solid granular material (usually a catalyst possibly shaped as tiny spheres) at high enough velocities to suspend the solid and cause it to behave as though it were a fluid. A fluidized-bed reactor is a combination of the two most common, packed-bed and stirred tank, continuous flow reactors. It is very important to chemical engineering because of its excellent heat and mass transfer characteristics. Fluidized bed reactors (FBR) are chambers that allow the mixing of liquid or gas substrates with powdered catalysts such that the catalyst acts like a fluid, maximizing mixing and interaction.
Fixed-bed reactors can be equipped with internal tubes where a heat transfer fluid, such as boiler feed water, can circulate inside the tubes to control the temperature rise in the reactor. We constructed the first fluidized bed reactor for roasting of sulfur bearing materials in 1950 (at that time the company was Lurgi, the business was acquired by Outotec). A simplified model for gassolid reactions in fluidised bed (FB) is proposed. Such models already exist for catalytic gassolid reactions (CGSRs), providing.
Widespread application of bubbling fluidised bed reactors to chemical processes has been hindered by some inherent drawbacks, like the high degree of internal mixing and the low contact efficiency between gas and solid phases. In this study, we present the developments in modeling gas-phase catalyzed olefin polymerization fluidized bed reactors (FBR) using chromium catalyst technique. Mathematical modelling of both fluidised and packed bed reactors has been carried out. In the fluidised bed reactor, a two-phase bubbling bed model has been used in order to estimate the interaction between gas bubbles and the dense phase in the bed.
Fixed Bed Reactor
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