Gradation Combination Method and Application of Hydrodesulfurization Catalyst and Hydrofining Catalyst

A hydrodesulfurization and hydrofining technology, which is applied in the gradation combination of hydrofining catalysts and in the field of hydrodesulfurization catalysts, can solve the problems of affecting catalyst activity and life, no solution proposed, insufficient catalytic activity, etc., and achieve effective It is beneficial to desulfurization reaction, reduces catalyst cost and improves catalytic activity

Active Publication Date: 2021-03-02
CHINA NAT OFFSHORE OIL CORP +4
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these patents have not carried out research on the addition amount and gradation combination of mesoporous molecular sieve materials, and most of these catalysts involve binary metal active components, and the catalytic activity is still insufficient.
In addition, the acidic centers of existing catalysts are easily covered by carbon deposition, which affects the activity and life of the catalyst
[0004] Aiming at the relevant problems in the prior art, no effective solution has been proposed yet

Method used

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  • Gradation Combination Method and Application of Hydrodesulfurization Catalyst and Hydrofining Catalyst
  • Gradation Combination Method and Application of Hydrodesulfurization Catalyst and Hydrofining Catalyst
  • Gradation Combination Method and Application of Hydrodesulfurization Catalyst and Hydrofining Catalyst

Examples

Experimental program
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Effect test

preparation example Construction

[0062] According to some embodiments of the present application, the preparation method of the mesoporous alumina and mesoporous molecular sieve composite material includes:

[0063] Using P123 as a template agent, mix it with mesoporous molecular sieve evenly to prepare the first solution;

[0064] adding an aluminum source and an inorganic acid to the first solution to prepare a second solution;

[0065] The second solution is left to stand for a specified time, dried to remove the solvent, and calcined to obtain a composite material of mesoporous alumina and mesoporous molecular sieve.

[0066] According to some preferred embodiments of the present application, the aluminum source is aluminum isopropoxide; the inorganic acid is nitric acid; the specified time is 2-6 hours; and the calcination temperature is 500-580°C.

[0067] According to some embodiments of the present application, the mesoporous molecular sieve is one or more of Beta-FDU-12, Beta-SBA-16 and Beta-KIT-6 c...

Embodiment 1

[0080] This example presents a hydrodesulfurization catalyst.

[0081] The pore size of the hydrodesulfurization catalyst particles gradually decreases from the outer side to the inner side, and the acidity of the catalyst gradually transitions from L acid to L acid and B acid.

[0082] The carrier of the hydrodesulfurization catalyst particles is a composite material of mesoporous alumina and mesoporous molecular sieve, wherein the mesoporous alumina is located on the outside of the composite material, and the mesoporous molecular sieve is located on the inside of the composite material. The average pore diameter of the catalyst is 9nm, and the active metal loads are respectively NiO (6% by mass fraction, the following percentage examples are all mass fractions), MoO 3 (8%) and WO 3 (12%).

[0083] This example also provides a method for gradation combination of hydrorefining catalysts.

[0084] The loading sequence of the catalysts in the reactor along the flow direction ...

Embodiment 2

[0111] This example provides a method for gradation combination of hydrofining catalysts.

[0112] The filling sequence in the reactor along the flow direction of the reactant materials is the mesoporous alumina-based hydrogenation protection catalyst and the mesoporous alumina and mesoporous molecular sieve composite material-based hydrodesulfurization catalyst.

[0113] The pore size of hydrodesulfurization catalyst particles gradually decreases from the outside to the inside, and the acidity of the catalyst gradually transitions from L acid to L acid and B acid.

[0114] Specifically, the hydrogenation protection catalyst adopts mesoporous alumina carrier, the most probable pore diameter is 20nm, and the active metal loading is MoO 3 (12%) and NiO (3%), the loading accounts for 50% of the total catalyst mass.

[0115] The particle carrier of hydrodesulfurization catalyst is mesoporous alumina and mesoporous molecular sieve composite material with mesoporous molecular sieve...

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Abstract

The invention discloses a hydrodesulfurization catalyst, a grading combination method of a hydrofining catalyst and application of the grading combination method. The most probable aperture of hydrodesulfurization catalyst particles is gradually decreased from the outside to the inside and the acidity of the catalyst is gradually transited from L acid to L acid and B acid. The grading combinationmethod comprises the following steps: filling a hydrogenation protective catalyst and the hydrodesulfurization catalyst in sequence along the flow direction of reaction materials, wherein the most probable aperture of the hydrodesulfurization catalyst particles is gradually decreased from the outside to the inside and the acidity of the catalyst is gradually transited from the L acid to the L acidand the B acid. A graded catalyst provided by the method disclosed by the invention has a multistage porous structure and suitable acidity collocation; by matching the graded catalyst with ternary metal active components, the effect of the hydrodesulfurization catalyst can be fully played and an active center of the hydrodesulfurization catalyst is effectively utilized, so that catalytic activityof a whole reaction system is improved while the cost of the catalyst is reduced.

Description

technical field [0001] The invention relates to the fields of petroleum refining and chemical industry, in particular to a gradation combination method and application of a hydrodesulfurization catalyst and a hydrorefining catalyst. Background technique [0002] With the rapid development of China's economy, the number of automobiles has increased year by year, and the environmental pollution caused by automobile exhaust has also followed, which has brought enormous pressure to the oil industry. Under the pressure of environmental protection, the production of clean oil has become the primary task of many fuel oil production enterprises. Studies have shown that the reduction of sulfur content in fuel oil can effectively reduce the emission of a large number of harmful substances. Therefore, how to reduce the sulfur content in fuel oil has become a concern of many researchers. At present, the hydrogenation process is still recognized as the most effective desulfurization me...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J29/78B01J29/035B01J29/03B01J35/10C10G45/12
CPCB01J23/002B01J23/883B01J29/0341B01J29/0358B01J29/7815B01J35/0006B01J35/1061B01J2229/18B01J2523/00C10G45/12B01J2523/31B01J2523/68B01J2523/847
Inventor 韩龙年段爱军侯章贵孟前辛靖陈禹霏陈新国田义斌李玉洋杜鹏
Owner CHINA NAT OFFSHORE OIL CORP
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