What determines the magnitude of the hydrogen circulation flow in a hydrocracking unit?
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Related to the feed rate, to ensure the hydrogen-to-oil ratio
The actual flow rate of recycled hydrogen is directly related to the designed capacity of the compressor; once the machine is selected, it is important that the gas valves function properly to ensure the normal operation of the machine. Then, when the inlet pressure of the machine is high, the flow rate is high as well. The hydrogen-to-oil ratio takes into account a certain amount of feed; it determines what the minimum amount of circulating hydrogen is, and the same principle applies in reverse
The speed of the circulator, the composition of the recycled hydrogen, and the amount of recycled hydrogen returned – all of these are relevant
Cyclic hydrogen compressor speed, reaction depth, cyclic hydrogen purity, fresh hydrogen purity, etc
Pressure, hydrogen purity, the compressor itself