Diesel oil fraction hydrogenating modification process
A hydrogenation upgrading and fractionation technology, which is applied in the petroleum industry, refining hydrocarbon oil, etc., can solve the problems of difficult operation, complex structure of countercurrent reactor, and high investment cost, and achieve high volumetric space velocity, low operating cost, and reduced Effect of PAH content
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[0029] Example 1
[0030] The feedstock oil A and hydrogen enter the hydrogenation reactor together, and contact the hydroprocessing catalyst D to react. The effluent after the reaction is cooled and separated, the hydrogen-rich gas is recycled, and the liquid product enters the fractionation system to be separated into diesel fraction and a small amount of naphtha fraction , The reaction conditions are shown in Table 2, and the product yield and properties are shown in Table 3.
[0031] It can be seen from Table 3 that the yield of diesel distillate products is 95.3% by weight, and the cetane number is 33.4. Compared with the raw material, the cetane number is increased by 12.7 units and the density is 0.8733g / cm. 3 , Compared with the raw material, the density of the product decreases by 0.0435g / cm 3 , And the content of polycyclic aromatic hydrocarbons in diesel products is only 5.0% by weight, and the sulfur content is less than 10μg / g.
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[0032] Example 2
[0033] The feedstock oil B enters the hydrogenation reactor together with hydrogen and reacts with the hydroprocessing catalyst D. The effluent after the reaction is cooled and separated, the hydrogen-rich gas is recycled, and the liquid product enters the fractionation system to be separated into diesel fraction and a small amount of naphtha fraction , The reaction conditions are shown in Table 2, and the product yield and properties are shown in Table 3.
[0034] It can be seen from Table 3 that the yield of the diesel distillate product is 95.6% by weight, the cetane number is 44.6, compared with the raw material, the cetane number is increased by 13.6 units, and the density is 0.8465g / cm 3 , Compared with the raw material, the density of the product decreases by 0.0454g / cm 3 And the content of polycyclic aromatic hydrocarbons in diesel products is only 2.8% by weight, and the sulfur content is less than 10μg / g.
Example Embodiment
[0035] Example 3
[0036] The feedstock oil B enters the hydrogenation reactor together with hydrogen, and sequentially contacts and reacts with the hydrorefining catalyst E and the hydroprocessing catalyst D without intermediate separation (the filling volume ratio of the hydrorefining catalyst E and the hydroprocessing catalyst D is 1 :1), the effluent after the reaction is cooled and separated, the hydrogen-rich gas is recycled, and the liquid product enters the fractionation system to be separated into diesel fraction and a small amount of naphtha fraction. The reaction conditions are shown in Table 2, and the product yield and properties are shown in Table 3. Shown.
[0037] It can be seen from Table 3 that the yield of the diesel distillate product is 96.0% by weight, the cetane number is 46.0, compared with the raw material, the cetane number is increased by 15.0 units, and the density is 0.8459g / cm 3 , Compared with the raw material, the density of the product drops by 0.0...
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