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High-specific-surface-area Fischer-Tropsch synthesis catalyst and preparation method and application of high-specific-surface-area Fischer-Tropsch synthesis catalyst

A Fischer-Tropsch synthesis and catalyst technology, applied in chemical instruments and methods, preparation of liquid hydrocarbon mixtures, physical/chemical process catalysts, etc., can solve problems such as limiting catalyst activity, reducing system disorder, reducing catalyst surface area, etc., to achieve Avoid shrinkage and collapse, simple and easy to operate, and improve the effect of activity

Active Publication Date: 2015-05-20
SYNFUELS CHINA TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The surface area of ​​the catalyst prepared by the precipitation method is generally difficult to exceed 200m 2 / g, which greatly limits the improvement of catalyst activity
This is because during the precipitation reaction, due to the inevitable direct contact between the particles, the particles are irreversibly stuck together and aggregated, thereby reducing the disorder of the entire system and finally reducing the surface area of ​​the catalyst.

Method used

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  • High-specific-surface-area Fischer-Tropsch synthesis catalyst and preparation method and application of high-specific-surface-area Fischer-Tropsch synthesis catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0074] Take by weighing 28.0 kilograms of iron nuggets, 0.28 kilograms of electrolytic chromium sheet, 0.28 kilograms of electrolytic copper and make concentration be the mixed nitrate solution of 10.18wt% standby with nitric acid dissolving, and its composition is: Fe:Cr:Cu=100:1.00:1.00( mass ratio); take by weighing 14.0 kilograms of silica sol with a solid content rate of 30wt%, join in the above-mentioned mixed solution, fully stir; take by weighing 0.14 kilograms of glucose and join in the above-mentioned mixed solution, so that the mass ratio of iron and glucose is 100: 0.5, stir well and evenly, and heat up to 80°C; take a certain amount of ammonia solution with a concentration of 5.5wt%, preheat to 60°C, and continuously co-precipitate at 80°C with a pH value of 6.0 under stirring; After aging for 5 minutes, wash until the ammonium nitrate content in the slurry is less than 0.1wt%, and filter to obtain a filter cake with a solid content rate of 16.5%; add 5L of deioniz...

Embodiment 2

[0078] Take by weighing 212.6 kilograms of ferric nitrate nonahydrate, 5.7 kilograms of copper nitrate trihydrate, 35.8 kilograms of 50wt% manganese nitrate solution and be dissolved in deionized water, and the obtained concentration is that 29.57wt% mixed nitrate solution is standby, and it is composed of: Fe:Mn: Cu=100:19.6:5.3 (mass ratio); 14 kilograms of silica sols with a solid content rate of 30.0wt% are weighed and added in the mixed nitrate solution, fully stirred evenly; 0.28 kilograms of oxalic acid are weighed and added in the above mixed solution, so that The mass ratio of iron to oxalic acid is 100:1.0 and the temperature is raised to 50°C; a certain amount of ammonia solution with a concentration of 19.6wt% is taken, preheated to 20°C, and continuously co-flowed at 50°C and a pH value of 9.0 under stirring Co-precipitation; aging for 120 minutes after precipitation, washing until the ammonium nitrate content in the slurry is less than 0.5wt%, and filtering to obt...

Embodiment 3

[0080] Take by weighing 212.6 kilograms of ferric nitrate nonahydrate, 7.0 kilograms of nickel nitrate hexahydrate, 5.7 kilograms of copper nitrate trihydrate, and 17.7 kilograms of 50wt% manganese nitrate solution are dissolved in deionized water, and the obtained concentration is a 20.00wt% mixed nitrate solution for subsequent use. The composition is: Fe: Ni: Mn: Cu = 100: 5.0: 9.7: 5.3; weigh 18.6 kg of silicon solution with a solid content rate of 30.0 wt%, add it to the mixed nitrate solution, and stir evenly; weigh 0.28 kg of sucrose and add In the above mixed solution, the mass ratio of iron to sucrose is 100:1.0, and the mixed salt solution is heated up to 80°C; a certain amount of ammonia solution with a concentration of 10.0wt% is taken, preheated to 50°C, and heated at 80°C under stirring. ℃, pH value of 8.5 continuous co-precipitation; aging for 10 minutes after precipitation, washing until the ammonium nitrate content in the slurry is less than 0.2wt%, and filteri...

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Abstract

The invention provides a high-specific-surface-area Fischer-Tropsch synthesis catalyst and a preparation method and application of the high-specific-surface-area Fischer-Tropsch synthesis catalyst. Organisms with different types and contents are added into different stages of catalyst preparation by a traditional coprecipitation method, for example, micromolecule organisms are added in the precipitation process so as to inhibit the aggregation of particles in the precipitation process, so that the dispersion degree of the whole system is improved; macromolecule organisms are introduced into a filter cake so as to inhibit the clustering of particles in the thermal treatment process, and can play a role of pore forming when being removed in a baking process; meanwhile, with the combination of the use of a high-thermal-stability additive, the contraction and collapse of a framework of the catalyst in the thermal treatment process can be prevented effectively; the method can be used for obviously improving the specific surface area of the Fischer-Tropsch synthesis ferrous catalyst, so that the activity of the catalyst can be improved greatly.

Description

technical field [0001] The invention belongs to the technical field of catalyst preparation, and in particular relates to a high specific surface area Fischer-Tropsch synthesis catalyst and its preparation method and application. Background technique [0002] The Fischer-Tropsch synthesis reaction refers to the process of converting the synthesis gas obtained from the gasification of carbon-containing resources such as coal, natural gas, and biomass into hydrocarbons and chemicals. Due to the depletion of petroleum resources, Fischer-Tropsch synthesis technology has received more and more attention in recent years. Catalysts commonly used in the Fischer-Tropsch synthesis process include Fe, Co, Ru, etc. Among them, Ru is not suitable for industrial applications due to its high price. Fe and Co are the only two types of Fischer-Tropsch synthesis catalysts suitable for industrialization. [0003] Most of the existing Fischer-Tropsch synthesis iron catalysts are prepared by ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/86B01J23/889C10G2/00
Inventor 杨勇青明王洪王珏白云坡任利荣王有良巩月伟郑林李永旺
Owner SYNFUELS CHINA TECH CO LTD
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