Paraffin oil hydrogenation
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When wax oil enters the facility, the raw material is analyzed; the sulfur content of the previous batch of raw material was similar to that of this batch as per laboratory tests. So why is the temperature rise during the refining process so high for this batch, given the presence of catalytically treated oil?
A large temperature rise indicates an increased reaction depth; it’s not just a matter of the sulfur content
Have there been any changes in the raw material composition, nitrogen content, and olefin content? And has the purity of the recycled hydrogen increased?
Catalytic oil is a type of refined oil; its sulfur content is similar to that of your previous raw materials, or even lower. However, it contains high levels of unsaturated hydrocarbons such as olefins and alkynes. The heat generated during hydrogenation to saturate these hydrocarbons is much greater than that produced by desulfurization and denitration processes, which makes the increase in temperature easier to understand
The cracking temperature rise is a bit low, while the refining temperature rise is quite high
There are many factors that affect the temperature rise, including the sulfur content of the raw materials, the presence of water, an increased amount of recycled hydrogen, and a high temperature at the reactor inlet.
Catalytic oil contains a high amount of unsaturated hydrocarbons, resulting in significant heat generation during hydrogenation
Catalytic oil has a high olefin content! In the refining reaction, the exothermic olefin saturation reaction is the most intense!