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Why has the amount of hydrogen in the reforming cycle decreased, while the temperature drop in the reactor has increased?
There are many factors that affect the temperature; it isn’t necessarily a problem with the recycle hydrogen
For the dehydrogenation reaction, as hydrogen decreases, the reaction proceeds in the forward direction; consequently, more dehydrogenation reactions occur, and the temperature difference within the reactor increases.
There are various types of reactions during catalytic reforming, but overall it is a endothermic reaction. Assuming that the feed rate of the reformation feed oil remains constant, as the amount of recycle hydrogen in the reformation process decreases, the mass flow rate and heat capacity of the material passing through the reactor decrease; therefore, the temperature drop in the reactor increases as expected, and there is no such thing as an inverse effect.