Cobalt-based catalyst for Fischer Tropsch synthesis and preparation method thereof

A cobalt-based catalyst and Fischer-Tropsch synthesis technology, which is applied in the preparation of liquid hydrocarbon mixtures and the petroleum industry, can solve the problems of low selectivity of effective products and poor abrasiveness, reduce synthesis costs, improve bonding energy, and facilitate the process The effect of control

Active Publication Date: 2013-12-25
NANJING TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] Most of the currently developed F-T synthesis catalysts have disadvantages such as poor abrasiveness, easy formation of inactive components inside the catalyst, and low selectivity of effective products.

Method used

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  • Cobalt-based catalyst for Fischer Tropsch synthesis and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Add 4500g of deionized water to reactor A, and add 500g of γ-Al after turning on the stirring motor 2 o 3 Mix the powder, add hydrochloric acid and continue mixing until the pH value of the slurry is 5.0. Add 5500g of deionized water to reactor B, and add 500g of γ-Al2 o 3 powder, after stirring and mixing evenly, mix the slurry in AB two kettles evenly, heat to 80°C and let it stand for 1 hour, continue to stir, add alkaline silica sol, so that the mass ratio of silicon to aluminum is SiO 2 : Al 2 o 3 =20:80, continue to stir and mix evenly. Slowly add the prepared 0.1mol / L zirconium oxychloride solution into the above slurry. The temperature of the slurry is controlled at 25°C. Medium SiO 2 、Al 2 o 3 And 0.5% of the total mass of zirconium oxychloride. The obtained granular powder material was calcined at 650° C. for 6 hours, cooled and cooled for later use. Configure 1mol / L cobalt nitrate solution, 0.5mol / L lanthanum nitrate solution, 0.1mol / L ruthenium nit...

Embodiment 2

[0034] Add 2000g of deionized water into reaction kettle A, start the stirring motor, add 200g of pseudoboehmite and stir, add nitric acid and continue mixing until the pH value of the slurry is 6.5. Add 8100g deionized water and 900g pseudo-boehmite to reaction kettle B, stir and mix evenly, mix the slurry in AB two kettles evenly, heat to 90°C and let stand for 0.5 hours, continue stirring, add Sexual silica sol makes the ratio of silicon to aluminum to SiO 2 : Al 2 o 3 =30:70, continue to stir and mix evenly. Slowly add the prepared 0.2mol / L zirconium oxychloride solution into the above slurry. The temperature of the slurry is controlled at 20°C. Medium SiO 2 、Al 2 o 3 and 8% of the total mass of zirconium oxychloride, the obtained granular powder material was roasted at 300° C. for 10 hours, cooled and cooled for later use. Configure 0.1mol / L cobalt nitrate solution, 0.1mol / L cerium nitrate solution, 0.1mol / L potassium nitrate solution and 0.1mol / L ruthenium nitrate...

Embodiment 3

[0036] Add 1200g of deionized water to reactor A, and add 50g of γ-Al after turning on the stirring motor 2 o 3 Stir the powder, add hydrochloric acid and continue mixing until the pH value of the slurry is 0.5. Add 22800g deionized water to reactor B, and add 950g γ-Al 2 o 3 After stirring and mixing evenly, mix the slurry in AB two kettles evenly, heat to 40°C and let it stand for 5 hours, continue to stir, add neutral silica sol to make the mass ratio of silicon to aluminum to SiO 2 : Al 2 o 3 =10:90, continue to stir and mix evenly. Slowly add the prepared 0.3mol / L zirconium oxychloride solution into the above slurry. The temperature of the slurry is controlled at 15°C. Medium SiO 2 、Al 2 o 3 and 15% of the total mass of zirconium oxychloride, the obtained granular powder material was roasted at 800° C. for 3 hours, cooled and cooled for later use. Configure the cobalt nitrate solution of 0.5mol / L, the lanthanum nitrate solution of 0.5mol / L, the manganese chlorid...

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Abstract

The invention relates to a cobalt-based catalyst for Fischer Tropsch synthesis and a preparation method thereof. The method comprises the following specific steps of: mixing acidified gamma-Al2O3 slurry with non-acidified gamma-Al2O3 slurry in a reaction kettle, heating and standing; adding silica sol, stirring and uniformly mixing; adding a zirconium component, continually stirring, and uniformly mixing; performing spray drying and forming to obtain particle powder, and baking the particle powder to obtain a catalyst carrier; and soaking a catalyst carrier into a solution containing cobalt and an activity assisting component to obtain a catalyst, drying and baking. The preparation method is simple, and a process is easy to control; by controlling operation parameters in a preparation process such as temperature, pH value and the like, the pole volume, specific surface area and pore structure of the carrier can be effectively adjusted, active components can be distributed more uniformly, the selectivity of the product is effectively increased, and the synthesizing cost of a liquid hydrocarbon is lowered; and the zirconium component is added, so that the wear resistance of the catalyst can be improved, and the service life of the catalyst is prolonged.

Description

technical field [0001] The invention relates to a catalyst for Fischer-Tropsch synthesis and a preparation method thereof. Specifically, it is a cobalt-based catalyst for Fischer-Tropsch synthesis and its preparation method, through which synthesis gas can be prepared into liquid hydrocarbons under certain conditions. Background technique [0002] Fisher-Tropsch synthesis (referred to as F-T synthesis, Fischer-Tropsch synthesis) is an important way to produce liquid hydrocarbons from coal and natural gas. my country's energy structure is characterized by rich coal and little oil and gas. Comparatively speaking, the reserves of coal and natural gas are relatively abundant. Therefore, it is of great significance to develop coal / natural gas to produce liquid hydrocarbons through synthesis gas. [0003] It is an indisputable fact that my country is a net oil importer. As of 2010, my country's imported crude oil has exceeded 50% of the domestic processing volume. With the deve...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/89B01J23/83C10G2/00
Inventor 管国锋万辉王磊
Owner NANJING TECH UNIV
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