Reforming reactor
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Reforming reactors are usually arranged in 3-4 series – why is that?
Since the reforming reaction is a highly endothermic reaction that requires a large amount of heat during its progression, when using an adiabatic fixed-bed reactor, multiple reactors connected in series with intermediate heating is often employed to maintain a high reaction temperature.
I agree with what was said on the second floor. To elaborate further, regarding the number of sections in a reforming reactor, it is related to the severity of the reaction and the composition of the feed; it should be determined based on the required octane value and the amount of heat generated by the reaction. The more reaction stages there are, the smaller the temperature variation within the reactor bed, which is favorable for the reaction. However, adding an additional reaction stage increases costs, and this may not be economically viable. Generally, the reaction severity is not high; the octane number of the product does not exceed 98, and the heat of reaction is below 1000 kJ/kg. A three-stage reaction can be considered, but a four-stage reaction is preferred in most cases.