Intermediate severity hydrotreating

Figure 5. Flow diagram refining of SRC-II oil by intermediate severity hydrotreating, case 2...

REFINING OF SRC-II OIL BY INTERMEDIATE SEVERITY HYDROTREATING TO PRODUCE 50,000 BARRELS PER CALENDAR DAY OF MOTOR GASOLINE PLUS JET FUEL DOE CONTRACT EF-76-C-01-2315 ... 

Naphtha Hydrotreating - At both the moderate and intermediate severities, it is necessary to further hydrotreat the naphtha before it can be fed to a bimetallic reforming catalyst. Table VII summarizes results of further hydrotreating of... 

The results in Table X reveal that hydrotreating under the reaction conditions and catalyst specified in Table I reduced the moles of azaanthracenes and azaphenanthrenes by ca. 83%. However, it is important to note that the decrease of 6.7 millimoles in reactants (mass 179) essentially equals, within the limits of data precision, the increase of 6.3 millimoles in products (masses 181 through 189). Consequently, for the given catalyst, the reaction conditions were insufficiently severe to convert intermediate products to hydrocarbons and NH. ... 

If the SRC-II is hydrotreated at an intermediate or moderate severity, further processing will be necessary to upgrade the product to specification transportation fuels. A number of pilot plant tests have been made to determine the conditions and to demonstrate the feasibility of these processing steps. 

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