Hydrogenation modification process for low grade gasoline
A technology of hydrogenation upgrading and low-quality gasoline, which is applied in the direction of removing heteroatoms through aromatics hydrogenation refining and refining, which can solve the problems of lowering the initial reaction temperature of the catalyst, prolonging the catalyst operation period, and catalyst performance limitations, so as to reduce equipment Low investment, low cost, and improved service life
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Embodiment 1
[0030] FCC gasoline I is fractionated on the true boiling point distillation unit to separate the 1 ) filled with Co-Mo / TiO 2 (No. A), the second reactor (R 2 ) filled with Ni ZSM-5 / TiO 2 (No. B), carry out hydrogenation upgrading on the >65°C fraction, and then mix the upgraded product with the <65°C fraction to produce qualified gasoline products. The chemical composition of the catalyst is shown in Table 1, and the test results are shown in Tables 2-4.
[0031] Table 1 Catalyst chemical composition
[0032] Catalyst chemical composition, w%
[0033] No. MoO 3 CoO NiO WoO 3 * TiO 2 * ZSM-5 / TiO 2
[0034] A 15.6 5.2 Margin
[0035] B 5.6 Margin
[0036] C 13.2 3.8 Margin
[0037] D 9.5 3.8 Margin
[0038] E 12.8 4.5 2.8 Margin
[0039] F 11.2 3.1 Margin
[0040] G 14.3 4.5 Margin
[0041] H 8.8 3.5 2.5 Margin
[0042] J 13.6 5.5 2.6 Margin
[0043] K 10.2 4.5 Margin
[0044] M 14.8 4.8 3.5 Margin
[0045] N 8.0 2.1 6.5 Margin
...
Embodiment 2
[0080] Using the same raw material oil and cutting scheme as in Example 1, on the medium-sized fixed-bed hydrogenation test device, the first reactor (R 1 ) filled with Mo-Ni / TiO 2 (Code C), the second reactor (R 2 ) filled with Co-Mo ZSM-5 / TiO 2 (No. D), carry out hydrogenation upgrading on the >65°C fraction, and then mix the upgraded product with the <65°C fraction to produce qualified gasoline products. The chemical composition of the catalyst is shown in Table 1, and the test results are shown in Tables 3-4.
[0081] From the data in Table 3, it can be seen that the sulfur content and olefin content of the >65°C fraction are significantly reduced after hydrodesulfurization and aromatization modification under the given catalyst and process conditions, the sulfur content is 55 μg / g, and the olefin content is 1.2v %, the aromatics content increased by 18 percentage points, and the octane number basically did not lose (RON decreased by 0.2 units).
[0082] As can be seen...
Embodiment 3
[0084] Using the same feed oil and catalyst as in Example 1, on a medium-sized fixed-bed hydrogenation test device, the operating conditions were changed to hydrogenate and upgrade the >65°C fraction, and the upgraded product was mixed with the <65°C fraction , so as to produce qualified gasoline products. See Table 3-4 for test results.
[0085] It can be seen from the data in Table 3 that the sulfur content and olefin content of the >65°C fraction are significantly reduced after hydrodesulfurization and aromatization modification under the given catalyst and process conditions, the sulfur content is 51 μg / g, and the olefin content is 3.4%. , the content of aromatics increased by 11 percentage points, the octane number decreased, and the RON decreased by 1 unit.
[0086] As can be seen from the data in Table 4, the sulfur content of product gasoline is 135 μg / g, the olefin content is 19.0v%, and the aromatic content is 27.0v%. Improve, its RON increased by 1 unit, and the y...
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