Issues with the condition of the reformation feed
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As the title suggests, the temperature inside the reforming reactor is around 450 degrees or higher. I would like to know whether the feedstock is in a gaseous state or a liquid state at this temperature. Also, is the naphtha entering the pre-hydrogenation reactor in a gaseous or liquid state?
The common catalytic reforming process today involves the feed oil passing through the catalyst in a gaseous state. Naphtha enters the pre-hydrogenation reactor in a liquid state
When starting up the reformation feed, the feed temperature is controlled at 370 degrees, as the feed is already vaporized at this point and no reaction takes place. The pre-hydrogenation reaction temperature is generally around 290 degrees, and at this temperature the naphtha has not fully vaporized; therefore, a two-phase system of gas and liquid coexists. To understand the state of oils, three factors are considered: temperature, pressure, and the composition of the raw materials. The answer can be found by checking the boiling points of the components in the raw material; the key is the lightest components and the heaviest components.
The feed temperature for catalytic reforming pre-hydrogenation is generally around 290, while the feed temperature for the reforming reaction is usually 370. Both are gas-phase reactions.