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Fischer-Tropsch synthesis catalyst, its preparation method and application thereof

A Fischer-Tropsch synthesis and catalyst technology, which is applied in chemical instruments and methods, preparation of liquid hydrocarbon mixtures, physical/chemical process catalysts, etc., can solve problems not involved in catalyst applications, etc., and achieve improved activity stability, increased selectivity, The effect of improving the selectivity of light olefins

Inactive Publication Date: 2012-10-17
SYNFUELS CHINA TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The patent does not involve the application of the prepared catalyst in the Fischer-Tropsch synthesis system

Method used

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  • Fischer-Tropsch synthesis catalyst, its preparation method and application thereof
  • Fischer-Tropsch synthesis catalyst, its preparation method and application thereof

Examples

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Embodiment 1

[0062] Take 1000 ml of 1M ferric nitrate solution (56 g of iron) and preheat to 80°C. Take a sufficient amount of 3M ammonia solution and preheat it to 60°C in an alkali-resistant tank. Add the nitrate solution into the continuously stirring precipitation tank and keep the temperature at 80°C, the pH value is 7.0±0.5, take a sufficient amount of 3M ammonia solution dropwise into the solution until precipitation occurs, stop adding ammonia solution and continue stirring After 3 hours, a catalyst precipitated slurry of 100 Fe was obtained. The precipitated slurry is left to stand for aging, washed, and suction filtered to obtain a precipitated filter cake. Dry the filter cake in an oven at 120°C for 24 hours, send the catalyst particles into a muffle furnace and bake at 300°C for 8 hours to obtain a shaped catalyst.

[0063] The obtained catalyst was subjected to a reaction pressure of 0.5MPa, a reaction temperature of 350°C, and a space velocity of 3000h -1 , H of syngas 2 ...

Embodiment 2

[0066] Take 1000ml of 1M ferric nitrate solution (56g iron) and 10ml of 1M copper nitrate solution (0.64g copper) and mix and preheat to 80°C. Take a sufficient amount of 3M ammonia solution and preheat it to 60°C in an alkali-resistant tank. Mix nitrate and 20ml of 1M ammonium metatungstate (3.68g tungsten) into the continuously stirring precipitation tank and keep the temperature at 80°C and the pH value of 7.0±0.5, add the ammonia solution dropwise to the stirring In the solution, until precipitation occurs, stop adding ammonia water dropwise, and continue to stir for 3 hours. The precipitated slurry is left to stand for aging, washed, and suction filtered to obtain a precipitated filter cake. The weight ratio of deionized water / filter cake is 1 / 1 deionized water, and the mass ratio is 100Fe / 16SiO 2 30wt% silica sol solution and 0.2M K with a mass ratio of 100Fe / 2K 2 CO 3 The solution is added to the filter cake, fully stirred and beaten to obtain a mass ratio of 100Fe / ...

Embodiment 3

[0070] Take 1000 ml of 1M ferric nitrate solution (56 g of iron) and preheat to 80°C. Take a sufficient amount of 3M ammonia solution and preheat it to 60°C in an alkali-resistant tank. Mix the nitrate solution and 50ml of 1M ammonium metatungstate (9.19g tungsten) into the continuously stirring precipitation tank, keep the temperature at 80°C, and the pH value is 7.0±0.5, add the ammonia solution drop by drop until Precipitation occurs, the dropwise addition of ammonia water is stopped, and stirring is continued for 3 hours to obtain a catalyst precipitation slurry having a tungsten / iron mass ratio of 16.4W / 100Fe. The precipitated slurry is left to stand for aging, washed, and suction filtered to obtain a precipitated filter cake. Deionized water with a weight ratio of deionized water / filter cake of 1 / 1, a 0.2M potassium silicate solution with a mass ratio of 5.6K / 100Fe and a mass ratio of 16.1SiO 2 The 30Wt% silica sol solution of / 100Fe is added to the filter cake, fully ...

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Abstract

The invention relates to a Fischer-Tropsch synthesis catalyst, its preparation method and an application thereof. The catalyst comprises the following main components: Fe, a metal auxiliary component W, a Cu auxiliary agent, an alkaline auxiliary agent selected from Li, Na, K, Mg, Ca, Rb and Cs, and a structural promoter which contains at least one ingredient or any combination selected from SiO2, active carbon, Al2O3, ZrO2 and TiO2. The specific surface area of the catalyst provided by the invention is usually 50-240 m<2> / g. The catalyst can be prepared by a sol-gel method, a coprecipitation method, an immersion method or any combination of the above preparation methods, but preferably by a parallel flow precipitation method. The catalyst provided by the invention can be used in high selectivity production of hydrocarbons, oxygen-containing compounds and the like through Fischer-Tropsch synthesis of synthetic gas. its reaction activity and stability are obviously improved. And selectivity of light olefins in the Fischer-Tropsch synthesis product hydrocarbon is obviously raised.

Description

technical field [0001] The present invention relates to a kind of Fischer-Tropsch synthesis catalyst, its preparation method and application, specifically, the present invention relates to a kind of tungsten-containing iron-based catalyst for Fischer-Tropsch synthesis, its preparation method, and the Fischer-Tropsch synthesis catalyst used in the production of hydrocarbons Applications in synthetic reactions. Background technique [0002] Fischer-Tropsch synthesis refers to the conversion of carbon monoxide and hydrogen (synthesis gas) into hydrocarbons under the catalysis of iron, cobalt, ruthenium and other metals. The raw materials of syngas are mainly carbonaceous materials such as coal, natural gas or biomass. Due to the dwindling crude oil reserves in the world and the sharp rise and fluctuation of crude oil prices, it is necessary to produce syngas through coal gasification, and then to produce vehicle fuel through Fischer-Tropsch synthesis indirect coal liquefaction...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/888C10G2/00
Inventor 许健薛彦峰张成华杨勇吴宝山李永旺
Owner SYNFUELS CHINA TECH CO LTD
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