Fischer-Tropsch synthetic oil hydrofining catalyst and preparation method and application thereof

A technology for Fischer-Tropsch synthetic oil and hydrotreating, which can be applied in the direction of selective hydrotreating, chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, etc., and can solve problems such as reducing the rate of coking and carbon deposition. , to achieve the effect of enhanced hydrogenation function, reduced coking and carbon deposition, and long service life

Inactive Publication Date: 2019-07-09
BEIJING SJ ENVIRONMENTAL PROTECTION & NEW MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Therefore, the technical problem to be solved by the present invention is to overcome the defect that the Fischer-Tropsch synthetic oil hydrofinishing in the prior art needs to be carried out step by step with different catalysts to reduce the coking and carbon deposition rate, thereby providing a catalyst that does not require A Fischer-Tropsch synthetic oil hydrofinishing catalyst that can complete the hydrofining reaction step by step, has a low coking carbon deposition rate, and can maintain a high olefin conversion rate and oxygen-containing compound conversion rate for a long time, its preparation method and its Application in Fischer-Tropsch synthetic oil hydrogenation process

Method used

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Examples

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Effect test

Embodiment 1

[0029] This embodiment provides a Fischer-Tropsch synthetic oil hydrotreating catalyst, including noble metal palladium Pd and γ-Al 2 o 3 carrier, wherein the mass of noble metal is γ-Al 2 o 3 0.2% of the mass of the carrier, γ-Al 2 o 3 The specific surface area of ​​the carrier is 460m 2 / g, the average pore size is 3.5nm.

[0030] The preparation method of this Fischer-Tropsch synthetic oil hydrotreating catalyst is as follows:

[0031] S1. Dissolve 75g of aluminum nitrate in 100g of deionized water, add ammonia solution and aluminum nitrate solution with a mass concentration of 2.5% into the beaker in parallel, so that the pH of the final solution is 8; the obtained precipitate is washed and filtered repeatedly and uniform Disperse in deionized water to make the volume 200 mL, add 16 mL of 1 mol / L nitric acid dropwise under stirring at 80°C, and continue stirring for 4 hours to obtain a 1 mol / L precursor sol.

[0032] S2. Take 40mL precursor sol, add 4.64g polyethyle...

Embodiment 2

[0038] This embodiment provides a Fischer-Tropsch synthetic oil hydrotreating catalyst, including noble metal palladium Pd and γ-Al 2 o 3 carrier, wherein the mass of noble metal is γ-Al 2 o 3 0.5% of the mass of the carrier, γ-Al 2 o 3 The specific surface area of ​​the carrier is 350m 2 / g, the average pore size is 5.0nm.

[0039] The preparation method of this Fischer-Tropsch synthetic oil hydrotreating catalyst is as follows:

[0040] S1. Dissolve 75g of aluminum nitrate in 100g of deionized water, add ammonia solution and aluminum nitrate solution with a mass concentration of 2.5% into the beaker in parallel, so that the pH of the final solution is 9; repeatedly wash and filter the obtained precipitate to obtain a uniform Disperse in deionized water to make the volume 200 mL, add 20 mL of 1.5 mol / L nitric acid dropwise under stirring at 100°C, and continue stirring for 2 hours to obtain a 1 mol / L precursor sol.

[0041] S2. Take 40mL precursor sol, add 4.64g polyet...

Embodiment 3

[0047] This embodiment provides a Fischer-Tropsch synthetic oil hydrotreating catalyst, including noble metal palladium Pd and γ-Al 2 o 3 carrier, wherein the mass of noble metal is γ-Al 2 o 3 1.0% of the carrier mass, γ-Al 2 o 3 The specific surface area of ​​the carrier is 500m 2 / g, the average pore size is 2.1nm.

[0048] The preparation method of this Fischer-Tropsch synthetic oil hydrotreating catalyst is as follows:

[0049] S1. Dissolve 15g of aluminum nitrate in 80g of deionized water, add ammonia solution and aluminum nitrate solution with a mass concentration of 2.0% into the beaker in parallel, so that the pH of the final solution is 8; the obtained precipitate is washed and filtered evenly Disperse in deionized water to make the volume 200 mL, add 12 mL of 0.5 mol / L nitric acid dropwise under stirring at 90°C, and continue stirring for 3 hours to obtain a 0.2 mol / L precursor sol.

[0050] S2. Take 40mL of precursor sol, add 9.28g of polyethylene oxide-propy...

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Abstract

The present invention provides a Fischer-Tropsch synthetic oil hydrotreating catalyst comprising a precious metal and a gamma-Al2O3 carrier, wherein the mass of the noble metal is 0.2% to 2.0% of themass of the gamma-Al2O3 carrier. By controlling the content of the precious metal, the catalyst reaches a balance between metallization and acidity, the hydrogenation function is enhanced, and cokingcarbon of the catalyst due to a dehydrogenation reaction of olefins is reduced. Therefore, the invention only adopts one catalyst, and can complete the hydrofining of the Fischer-Tropsch synthetic oilwithout step reaction. The catalyst has a low coking and carbon deposition rate and long service life, and can ensure a higher olefin conversion rate and oxygen-containing compound conversion rate for a long time.

Description

technical field [0001] The invention relates to the technical field of hydrogenation catalysts, in particular to a Fischer-Tropsch synthetic oil hydrotreating catalyst and its preparation method and application. Background technique [0002] With the increasing scarcity of petroleum resources and people's emphasis on environmental protection, vigorously developing coal liquefaction technology has become the focus of attention. Indirect coal liquefaction can not only make full use of abundant coal resources, but also produce a large amount of clean and high-quality fuel oil, relieve the pressure of oil dependence on foreign countries, and maintain strategic security. The low-temperature Fischer-Tropsch synthetic oil produced by indirect coal liquefaction is a "sulfur-free, nitrogen-free and aromatic-free" clean fuel, but it contains a large amount of olefins and oxygen-containing compounds, and is relatively acidic. Treatment is not only easy to corrode equipment, but also a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/44B01J23/42B01J35/10C10G45/10C10G45/40
CPCB01J23/44B01J23/42B01J35/1019B01J35/1061C10G45/10C10G45/40
Inventor 刘营高群仰胡胜
Owner BEIJING SJ ENVIRONMENTAL PROTECTION & NEW MATERIAL CO LTD
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