Investigating factors affecting the choice of reactor type (fixed bed or fluid bed) in chemical industries
Keywords:
Mass Transfer, Heat Transfer, Fixed Bed Reactor, Fluidized Bed, Chemical IndustriesAbstract
Reactors are among the most important equipment in the chemical industry, used for carrying out chemical reactions. Choosing the appropriate type of reactor for a technological process results in the production of high-quality chemical products with lower energy consumption in a short period. The aim of this research was to identify the appropriate type of reactor for specific productions, using credible domestic and international scientific sources for identification. Studies showed that fixed bed reactors consist of a spongy solid bed through which the interacting fluid passes, and chemical interactions occur on the surface of the catalytic or non-catalytic bed particles. Fluidized bed reactors are also composed of a spongy carrier bed that is suspended by the interacting fluid, with the particles in motion, and chemical interactions occur on the surface of these particles. Both types of reactors have their own advantages and disadvantages. Fixed bed reactors have advantages such as simplicity in design and construction, ease of use, and low consumption. However, they also have disadvantages such as the formation of hot spots and limited mass and heat transfer capacity. Fluidized bed reactors also have advantages such as excellent fluid mixing, uniform heat distribution, high mass and heat transfer capacity, and the absence of hot spots. On the other hand, they also have disadvantages such as complexity in design and construction, and erosion of bed particles. Considering the above factors, it can be concluded that the selection of the appropriate type of reactor in chemical industries depends on various factors such as the type of interaction, operating conditions, and technological process requirements.
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